WO2012172025A1 - Radiation-emitting component and method for producing a radiation-emitting component - Google Patents

Abstract

A radiation-emitting component is specified, comprising a first electrode (20), a radiation-emitting organic layer (30) on the first electrode (20), and a second electrode (40) on the radiation-emitting organic layer (30), wherein the organic layer (30) contains an ionic component and comprises at least one phosphorescent rare earth metal complex. Furthermore, a method for producing a radiation-emitting component and the use of a phosphorescent rare earth metal complex in a radiation-emitting component are specified.

Description

description

Radiation-emitting component and method for

Production of a radiation-emitting component

The invention relates to a radiation-emitting component which contains an ionic component in its organic layer and to a method for producing a

Radiation-emitting device with an ionic

Component. Furthermore, the use of a

Phosphorescent rare earth metal complex in one

Radiation-emitting device indicated.

This patent application claims the priority of German Patent Application 102011104169.2, the disclosure of which is hereby incorporated by reference.

Organic electroluminescent devices contain at least one organic layer between two electrodes. For example, between the electrodes

 Hole injection layer, a hole transport layer, a

Perforated block layer, three emission layers, one

Electron block layer, an electron transport layer and an electron injection layer to be stacked. In the case of organic light-emitting diodes

(OLEDs) are electrons injected from the cathode in the LUMO (lowest unoccupied molecular orbital) in the organic layer when a voltage is applied, and migrate from there towards the anode. Accordingly, holes injected from the anode migrate through the HOMO (highest occupied molecular orbital) of the organic layer to the cathode. When holes and electrons meet in the organic layer, they can become an excited state, the so-called Excitons, form and emit light at their decay. To decouple the light, at least one of the electrodes is transparent. If small molecules are used in OLED structures, the organic layer stack contains, in addition to the actual emission layer, several functional layers, such as, for example, electron transport layers, hole transport layers, electron block layers,

Perforated block layers and optionally further emitting layers. For electron injection into OLEDs

highly reactive materials used to create an efficient

To achieve light emission, which is why a hermetic

Sealing of the components is essential.

In contrast to OLEDs, light-emitting organic electrochemical cells (OLEEC) generally have a simpler structure. Usually only one organic layer is arranged between two electrodes. Reactive electrodes such as in OLEDs (for example, barium, calcium, lithium fluoride, cesium fluoride or magnesium) are not needed. This represents a simplification in terms of encapsulation requirements compared to OLEDs. OLEECs can thus be regarded as a cost-effective alternative to OLEDs.

So far, ionic transition metal complexes have been used as emitting species in OLEECs. For example

Ruthenium (tris-bipyridine) hexafluorophosphate [Ru (bpy) 3] ²⁺ (PF ₆ ^~ ) ₂ . But also complexes with osmium, copper and iridium as the central atom are known. An object of the invention is to provide a

Radiation-emitting device, which is cheaper to produce compared to known components. Another object is to provide a method for Production of a radiation-emitting component.

Finally, another task is the realization of the use of cost-effective materials for

Radiation-emitting components.

These objects are achieved by a radiation-emitting component according to claim 1, a method according to claim 11 and a use according to claim 15. Further embodiments of the component and the method are the subject of dependent claims.

A radiation-emitting component is provided which comprises a first electrode, a radiation-emitting organic layer on the first electrode and a second electrode on the radiation-emitting organic layer. In this case, the organic layer contains an ionic component and comprises at least one phosphorescent

Rare earth metal complex. The formulation that the organic layer contains an ionic component and at least one phosphorescent

In this context, it should be understood that the ionic component is a component present in the organic layer in addition to the phosphorescent rare earth metal complex, and / or at least one rare earth metal complex itself constitutes an ionic component in the organic layer.

This is a radiation-emitting device

provided as a phosphorescent emitter

Rare earth metal complex comprises, which has a sufficiently high quantum efficiency. Since rare earth metals are inexpensive, even rare earth metal complexes can be inexpensive to be provided. Thus, these emitters provide a cost effective alternative to previously known emitters in radiation emitting devices used in their

Radiation-emitting organic layer containing an ionic component, is.

Under rare earth metal complex is a compound too

in which a metallic central atom selected from the rare earth metals is coordinated by at least one ligand. In this context, ligands can also be understood as meaning solvent molecules.

In this context and in the following, an ionic component is understood as meaning an anionic or a cationic component. The ionic component may be in the form of a salt, for example.

According to one embodiment, the organic layer further comprises at least one matrix material, wherein at least one rare earth metal complex and / or at least one matrix material is ionic.

Thus, for example, an ionic or neutral rare earth metal complex can be combined with a matrix material comprising an ionic component. Alternatively, an ionic rare earth metal complex in a

nonionic matrix material present. Is an ionic or neutral in the organic layer

Rare earth metal complex, this can be combined with an ionic matrix material, wherein the matrix material also contains components that improved for an improved

Energy transfer to the rare earth metal complex provide and / or radiation having a lower wavelength

can emit as the rare earth metal complex. Even when combining the rare earth metal complex with another emitting component, the emitted light of the wavelength emitted by the rare earth metal complex is largely perceptible to an external observer, since usually excited states are present in the lower energy

longer wavelength emitting components are formed, for example, when the emitting components are present with a distance of less than 10 nm in the organic layer.

The matrix material may be selected from a group comprising ionic liquids, polymers, hole transporting small molecules, electron transporting small molecules, ionic transition metal complexes, and combinations thereof.

When an ionic liquid is used as the matrix material, it is an ionic matrix material which avoids triplet-triplet annihilation for improving the turn-on performance of the device, and the

Charge transport in the organic layer increased. Triplet-triplet annihilation can occur when the emitters, the rare-earth phosphorescent complex molecules, are present at a short distance in the organic layer. The ionic liquid is used for dilution, so that the excited states formed are no longer mutually exclusive

influence. Examples of ionic liquids which can be used as matrix material in the radiation-emitting component are given below, partially with structural formula: 1-Benzyl-3-methylimidazolium hexafluorophosphate

, 3-dimethylimidazolium hexafluoroph

r

r

 1-butyl-3-methylimidazolium hexafluorophosphate

 1-ethyl-3-methylimidazolium hexafluorophosphate

/ T ^{N +}

PF ₆ - N

CH ₃

r 1-hexyl-3-methylimidazolium hexafluorophosphate

r

1-butyl-1- (3,3,4,4,5,5,6,6,7,7,8,8,8-ridecafluorooctyl) imidazolium hexafluorophosphate

1 -Methyl-3-octylimidazolium hexafluorophosphat

l-methyl-3- (3,3,4,4,5,5,6,6,7,7,8,8,8-tridecafluorooctyl) imidazolium hexafluorophosphate

1-methyl-3-octylimidazolium hexafluorophosphate

1-Benzyl-3-methylimidazolium tetrafluoroborate

Butyl 2, 3-dimethylimidazolium tetrafluoroborate

l-But l-3-methylimidazolium tetrafluoroborate

1-ethyl-3-methylimidazolium tetrafluoroborate 3

1-hexyl-3-methylimidazolium tetrafluoroborate CH ₃

Λ BF. ^"

 N

CH ₂ (CH ₂ ) ₄ CH 3

 r

-Butyl-3-methylimidazolium trifluoromethanesulfonat -Methyl-3-octylimidazolium tetrafluoroborate

Butyl-3-methylimidazolium trifluoromethanesulfonate

 -N ''

 > O-S-CF »

OI-ethyl-3-methylimidazolium trifluoromethanesulfonate

1,2,3-trimethylimidazolium trifluoromethanesulfonate

l-ethyl-3-methyl-imidazolium

l-Butyl-3-methylimidazolium bis (trifluoromethylsulfonyl) imid

bis (pentafluoroethylsulfonyl) imide

l-Butyl-3-methylimidazolium bis (trifluoromethylsulfonyl) imide

1-butyl-3-methylimidazolium methanesulfonate

I 3 © -S-CH,

 N Ä

Tetrabutylammonium bis-trifluoromethanesulfonimidate

H ₃ C-

N +

H ₃ C ~, CH, O - O

 Tetrabutylammonium methanesulfonate

H ₃ C- _^ / ^ ^ V ^ -CH ₃ O * _F

 Tetrabutylammonium nonafluorobutanesulfonate

H ₃ C o

H ₃ C- CH ₃ O ^'

Tetrabutylammonium heptadecafluoro-octanesulfonate Tetrahexylammonium tetrafluoroborate

Tetrabutylammonium trifluoromethanesulfonate

 Tetrabutylammonium benzoate

chloride

bromide

l-benzyl-3-methylimidazolium tetrafluoroborate,

Trihexyltetradecylphosphonium hexafluorophosphate,

Tetrabutylphosphonium methanesulfonate, tetrabutylphosphonium tetrafluoroborate, tetrabutylphosphonium bromide, 1-butyl-3-methylpyridinium bis (trifluoromethylsulfonyl) imide, 1-butyl-4-methylpyridinium hexafluorophosphate, 1-butyl-4

methylpyridinium tetrafluoroborate Sodium tetraphenylborate, tetrabutylammonium tetraphenylborate, sodium tetrakis (1-imidazolyl) borate, cesium tetraphenylborate.

Furthermore, polymers can be used as matrix material in the

Radiation-emitting device can be used.

For example, the polymers may be from a group

be selected, the polyethylene oxides (polyethylene glycols), polyethylenediamines, polyacrylates such as polymethyl methacrylate (PMMA) or polyacrylic acid or salts thereof

 (Superabsorber), substituted or unsubstituted

Polystyrenes such as poly-p-hydroxy-styrene, polyvinyl alcohols, polyesters, polyurethanes, polyvinylcabazoles, polytriarylamines, Polythiophene and Polyvinylidenphenylene includes. Polymers as matrix materials can improve the semiconductive properties. Alternatively or additionally, as a matrix material

electron or hole transporting low molecular weight

Compounds in the organic layer may be present, for example, to improve the electron and hole conductor capabilities. The following compounds can be used by way of example as hole-transporting small molecules:

N, '-Bis (naphthalen-1-yl) -N,' -bis (phenyl) -9,9-dimethyl-fluorene, N, '-Bis (3-methylphenyl) -N,' -bis (phenyl) - 9,9-diphenyl-fluorene, N, '- bis (naphthalen-1-yl) -N,' - bis (phenyl) - 9, 9-diphenyl-fluorene, N, N'-bis (naphthalen-1-yl ) -N, N'-bis (phenyl) -2,2-dimethylbenzidine, N, '-Bis (3-methylphenyl) - Ν, Ν'-bis (phenyl) -9,9-spirobifluorene, 2, 2', 7, 7'-tetrakis (N, N-diphenylamino) -9,9'-spirobifluorene, N, '- bis (naphthalen-1-yl) -N, N'-bis (phenyl) -benzidine, N,' - Bis (naphthalen-2-yl) - N, '- bis (phenyl) benzidine, N,' - bis (3-methylphenyl) - N, '- bis (phenyl) benzidine, N,' - bis (3) methylphenyl) -N, N'-bis (phenyl) -9,9-dimethyl-fluorene, N, '-Bis (naphthalen-1-yl) - Ν, Ν'-bis (phenyl) -9,9-spirobifluorene, Di- [4- (N, N-ditolylamino) -phenyl] cyclohexane, 2, 2 ', 7, 7' tetra (N, N-di-tolyl) amino spiro-bifluorene, 9, 9-bis [4- (N, N-bis-biphenyl-4-yl-amino) -phenyl] -9H-fluorene, 2, 2 ', 7, 7' -tetrakis [N-naphthalenyl (phen yl) -amino] -9,9-spirobifluorene, 2,7-bis [N, N-bis (9,9-spiro-bifluoren-2-yl) -amino] -9,9-spirobifluorene, 2,2 ' Bis [N, N-bis (biphenyl-4-yl) amino] -9,9-spirobifluorene, N, '-bis (phenanthrene-9-yl) -N,' -bis (phenyl) -benzidine, N, Ν, Ν ', Ν' -tetra-naphthalen-2-yl-benzidine, 2,2 '-bis (N, N-diphenyl-amino) -9, 9-spirobifluorene, 9, 9-bis [4- (N, N-bis-naphthalen-2-yl-amino) phenyl] -9H-fluorene, 9,9-bis [4- (N, N'- bis-naphthalen-2-yl-N, '-bis-phenyl-amino) -phenyl] - 9H-fluorene, titanium oxide phthalocyanine, copper phthalocyanine,

2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane,

4,4 ', 4 "-tris (Ν-3-methylphenyl-N-phenyl-amino) triphenylamine, 4,4', 4" -tris (N- (2-naphthyl) -N-phenyl-amino) triphenylamine, 4,4 ', 4 "-Tris (N- (1-naphthyl) -N-phenyl-amino) triphenylamine, 4,4', 4" -Tris (N, -diphenyl-amino) triphenylamine, pyrazino [2, 3 - f] [1, 10] phenanthroline-2, 3-dicarbonitrile, Ν, Ν, Ν ', Ν'-tetrakis (4-methoxyphenyl) benzidine, 2,7-bis [N, N-bis (4-methoxy) phenyl) amino] -9, 9-spirobifluorene, 2,2 '-bis [Ν, Ν-bis (4-methoxy ^¬ phenyl) amino] -9, 9-spirobifluorene, N, N'-di (naphthalene-2- yl) - N, N'-diphenylbenzene-1,4-diamine, N, N'-di-phenyl-N, '- di- [4- (N, N-di-tolylamino) phenyl] benzidine, N , N'-Di-phenyl-N, N'-di- [4- (N, N-di-phenyl-amino) -phenyl] -benzidine.

Examples of electron transporting small molecules are:

2, 2 ', 2 "- (1, 3, 5-benzene triyl) tris (1-phenyl-1-H-benzimidazole), 2- (4-biphenylyl) -5- (4-tert-butylphenyl) -1 , 3, 4-oxadiazole, 2, 9-dimethyl-4,7-diphenyl-l, 10-phenanthroline, 8-hydroxyquinolinolato-lithium, 4- (naphthalen-1-yl) -3, 5-diphenyl-4H-1 , 2,4-triazole, 1,3-bis [2- (2,2'-bipyridin-6-yl) -1,3,4-oxadiazo-5-yl] benzene, 4,7-diphenyl-1, 10-phenanthroline, 3- (4-biphenylyl) -4-phenyl-5-tert-butylphenyl-1,2,2-triazole, bis (2-methyl-8-quinolinolato) -4- (phenylphenolato) aluminum, 6, 6'-bis [5- (biphenyl-4-yl) -1,3,4-oxadiazol-2-yl] -2,2'-bipyridyl, 2-phenyl-9,10-di (naphthalen-2-yl ) anthracene,

2, 7-bis [2- (2,2'-bipyridin-6-yl) -1, 3, 4-oxadiazo-5-yl] -9,9-dimethylfluorene, 1,3-bis [2- (4 tert-butylphenyl) -1,3,3,4-oxadiazo-5-yl] benzene, 2- (naphthalen-2-yl) -4,7-diphenyl-l, 10-phenanthroline, 2,9-bis (naphthalene 2-yl) -4,7-diphenyl-l, 10-phenanthroline, tris (2,4,6-trimethyl-3- (pyridine-3-) yl) phenyl) borane, 1-methyl-2- (4- (naphthalen-2-yl) phenyl) -1H-imidazo [4,5-f] [1,10] phenanthroline.

Furthermore, ionic transition metal complexes can also be used as matrix material in the organic layer. Examples of such complexes are bis [2- (4, 6-difluorophenyl) pyridinato-N, C2] iridium (III) [1,1'-dimethyl-3,3'-methylenediimidazoline-2,2'-diylidene] hexafluorophosphate (Ir (ppy) 2 (pbpy) PFg or (bis [2- (4,6-difluorophenyl) pyridinato-N,] iridium (III) [1, 1 '-dimethyl-

3,3'-methylene-diimidazoline-2, 2'-diylidene]) hexafluorophosphate. Such matrix materials can charge transport

improve and enable triplet-exciton transitions. According to one embodiment, the phosphorescent

 Rare earth metal complex to be selected from a group, the anionic rare earth metal complexes of the general formula

[Kat] ^{n +} [M (if _L-w) (i-L _x) (i _y -L) (i -L _z)] ^"n (formula I),

Cationic rare earth metal complexes of the general formula [M (T-L _w ) (i -L _x ) (T -L _y ) (i -L _z )] ^{+ n} [An] ⁿ (Formula II) and

neutral rare earth metal complexes of the general formula

[M (r | ^w -L _w ) (r | ^x -L _x ) (r | ^y -L _y ) († -L _z )] ⁰ (Formula III). In this case, L _w , L _x , Ly and L <are each a ligand, wherein the ligands may be the same or different. M stands for a rare earth metal, ie Sc, Y, and lantanoids. n in the general formulas I to III stands for the

The denticity of the ligand and w, x, y and z are independently selected from the range of 0 to 8, where 6 <w + x + y + z <8. The notation for example (n ^w - L _w ) is thus meant in that a w-dentate ligand L _w is coordinated to the rare earth metal M. For example, if w is 0, and x, y, and z are each other than 0, then that is Metal M coordinates only the three ligands L _x , Ly and L _z , which may be the same or different. Because the

 Accordingly, the coordination number of rare earth metals is generally 8, the denticity of the ligands may therefore be selected between 1 and 8, preferably between 1 and 3. Accordingly, depending on the denticity, different numbers of ligands may be coordinated to the rare earth metal atom.

For example, a rare earth metal of four bidentate ligands may be coordinated with a formal charge of -1 each, thus yielding a singly negatively charged complex.

For anionic rare earth metal complexes, the sum of w + x + y + z gives about 8, for cationic and neutral

 Rare earth metal complexes give the respective sum approximately greater than 6 to 8. n in the general formulas I to III may each be 1, 2 or 3, depending on how much charged the respective

Rare earth metal complex and the corresponding counter anion or counter cation are. Accordingly, in the general formula, Kat means counter cation, and An means counter anion. In the anionic rare earth metal complexes, n is preferably equal to 1, in cationic rare earth metal complexes n is preferably 3. The notation [cat] ^{+ n} is one

summary notation for a mixture of [Cat] ^{+ n,} n [Cat] + and mixtures [KAT] ^+0, [Katj] + P [Cat _k] ^{+ c} t with o + p + q containing = n , This means that either a rare earth metal complex has a counter cation of charge + n

is coordinated, or n counter cations of charge + or

Cation mixtures containing a cation Katj_, a cation Katj, and a cation Kat ^ with the respective charges + o, + p and + q contain, wherein the sum of the charges o, p and q equal to n.

The statements made for [Kat] ^{+ n} apply analogously to the notation

[An] ^{~ n} .

The countercations in the general formula I can be selected from a group comprising metal cations,

for example, alkali metal or alkaline earth metal cations and complex derivatives such as 18-crown-6-potassium, substituted and unsubstituted ammonium compounds, for example

Trimethylbenzylammonium, which is highly solvent-diluting, and complex cations, such as ferricinium (bis-cyclopentadienyl) iron (III) comprises.

Gegenanionen of the general formula II can from a

Fluoride, chloride, bromide, iodide, sulfate, phosphate, carbonate, trifluoromethanesulfonate,

Trifluoroacetate, tosylate, bis (trifluoromethylsulfone) imide,

Tetravinylborate, BgC2H _] _ _] _, hexafluorophosphate,

Tetrafluoroborate, hexafluoroantimonate, Tetrapyrazolatoborat and complex anions such as Fe (CNG) 3 ^~, Fe (CN) g ^ ^~, Cr (C ₂ 04) ^3_, Cu (CN) ₄ ^3_ and Ni (CN) ₄ comprises ^2_. The ligands L ^ _j , L ^, Ly and L <may independently of one another be selected from a group comprising the 2,2'-bipyridine derivatives, phenanthroline derivatives, 2, 2 ', 2''- terpyridyl derivatives, imidazoles, benzimidazoles, oxazoles,

Triazines, phthalocyanines, amino acids, 2,6-bis (2'-quinolyl) pyridine, oximes, nitroso compounds, amides,

 Hydrazides, oxo compounds of N-heterocycles, crown ethers, pyridine derivatives with azo compounds, alcohols, phenols,

Polyalcohols, hydroaldehydes, ketones, sulfonic acids, quinones, Benzoquinones, anthraquinones, macrocycles, sulfoxides,

Sulfonamides, thiols, thiocarboxylates, dithiocarbamic acids, thioureas, sulfur-containing heterocycles,

Bistrimethylsilylamides, phosphines, phosphine oxides,

Phosphoric acids and their esters, phosporous acid and its esters, amides of phosphinic acid, amides of phosphonic acid, amides of sulfur and arsenic acids, hydroxo,

Nitrato, azido, halogeno, phosphato, sulfito, sulfato,

Thiosulfato, carbonates, isocyanato, mono-, di-, tri-, tetra- and polyphosphato derivatives, cytosine derivatives, coumarin derivatives, adenine derivatives, purine derivatives and carboxylate derivatives. For example, the ligands L ^ _j , L ^, Ly and L <

independent from Pheenantrolinen and

Acetylacetates are selected.

By way of example, the ligands may be substituted or

unsubstituted 2, 2 'bipyridine derivatives include, as well as

fused derivatives, such as

Phenanthroline derivatives. Also derivatives with higher

Teeth, such as 2, 2 ', 2' '-Terpyridylderivate can

to be selected. Also suitable are nitrogen derivatives such as imidazoles, benzimidazoles, oxazoles, triazines,

Phthalocyanines, amine acids such as pyridine carboxylic acids or EDTA, and 2, 6-bis (2'-quinolyl) pyridine.

Furthermore, the ligands may, for example, selected from complex pyridine ligands with azo compounds such as 2, 6-pyridinediyl bis [a- (ethylidene hydrazone benzyl alcohol)], or oximes, nitroso compounds, amides, hydrazides, oxo compounds of N-heterocycles such as lactams or succinimides and cryptands be. Further examples of ligands are alcohols, phenols,

Polyalcohols such as sugar molecules,

Hydroaldehydes, ketones, for example salicylaldehyde,

Sulfonic acids, quinones, benzoquinones, anthraquinones,

Crown ethers and macrocycles (12-crown-4, 15-crown 5, 18-

Krone-6, Dibenzo-18-Krone-6 up to Dibenzo-30-Kronel0), as well as 1, 3-Diketone.

Sulfur derivatives can also be selected as ligands. Exemplary here are sulfoxides, sulfonamides, thiols,

Thiocarboxylates, dithiocarbamic acids, thioureas, sulfur-containing heterocycles such as 1, 4-oxathiane or dithiane, and called Bistrimethylsilylamide. Also suitable are phosphorus derivatives such as phosphines, phosphine oxides, phosphoric acids and their esters, phosphorous acid and its esters, amides of phosphinic acid and amides of phosphonic acid. Also conceivable are amides of sulfur and arsenic acids.

Suitable ligands may also be selected from inorganic derivatives such as hydroxo, nitrato, azido, halo, phosphato, sulfito, sulfato,

Thiosulfato-, Carbonato-, Isocyanato derivatives, and

cyclic or straight-chain mono-, di-, tri-, tetra- and polyphosphate derivatives. An example of an anionic ligand is bis (trifluoromethylsulfone) amide.

Other possible ligands are biologically active

Heterocyclic derivatives such as cytosine derivatives, coumarin derivatives, adenine derivatives and purine derivatives. Another class of suitable ligands are

Carboxylate derivatives, for example, acetates and their

substituted derivatives. Substituents are here

for example, F, Cl, Br, I, substituted and

unsubstituted aromatics. Further examples are di- to polycarboxylates (malonates, succinates, glutarates,

Oxydiacetates, fumarates, oxalates, phthalates,

Cyclopropane tetracarboxylates, benzene tricarboxylates,

Benzene tetracarboxylates to benzene hexacarboxylates).

The ligands can be combined in almost any manner. The choice of ligands can be made according to their respective charge, depending on what is to be achieved for a total charge of the rare earth metal complex.

The ligands in the complex have little effect on the emission wavelength of the rare earth metal complex, but allow control of quantum efficiency and solubility for processing. Many of the ligands are also designed so that the rare earth metal complexes containing these ligands are soluble in the water, so that the radiation-emitting organic layer can optionally also be prepared from inexpensive aqueous solution. The rare earth metals in the rare earth metal complexes may be selected from a group comprising Eu, Tb and Gd.

For example, for the general formula I as

Ligands acetylacetonates with different substituents (for example, F, Cl, Br, I, aromatics, substituted and unsubstituted benzoates or higher homologs) can be used. Other possible ligands are, for example

Picolinate, guanidinate, cyclopentadienyl or two-fold negative charged ligands, such as oxalate. Monodentate ligands can, for example, Cl ^~, Br ^", I and CN ^~ be.

If the anionic ligands in the anionic complexes are replaced by neutral ligands, cationic rare earth metal complexes according to the general formula II are obtained. In this formula, at least one of the ligands is uncharged. For example, nitrogen based ligands based on 2,2'-bipyridine, such as

substituted or unsubstituted 2, 2 'bipyridines or bridged phenantroline derivatives can be used. Also mono- or polydentate phosphine ligands are conceivable.

In the neutral rare earth metal complex according to the general formula III, it is possible in particular to use three singly negatively charged, bidentate ligands and one bidentate neutral ligand. An example of such a complex is tris (benzoylacetonato) mono (phenanthroline) europium (III).

Due to the lack of charge of this complex, such compounds become associated with an ionic matrix

used.

Further possible ligands can be found, for example, in the Gmelin Handbook of Inorganic Chemistry, Sc, Y, La-Lu Rare Earth Elements, parts D1 to D5.

The first and / or the second electrode in the

Radiation-emitting device can be transparent

be educated. Here, for example, the first

Electrode a cathode and the second electrode to be an anode or vice versa. For example, a transparent electrode may contain indium tin oxide (ITO). Other materials include aluminum zinc oxide (AZO) or doped Tin oxides. For example, electrode materials may also be selected from gold, silver and aluminum. When

Electrode material can furthermore also be used PEDOT: PSS (poly-3,4-ethylenedioxythiophene doped with polystyrene sulfonate) or polyaniline, which additionally provide planarization and uniform current distribution in the respective electrode.

The radiation-emitting component may be an organic light-emitting electrochemical cell. When an electric field is applied in a light-emitting electrochemical cell, the mobile ions in the organic layer redistribute under the electric field. As a result, a high electric field is generated at the electrodes, which makes both contacts ohmic and thus the

Charge injection into the organic layer facilitates. The charges are then transported within the organic layer and generate light emission as holes and electrons meet and recombine to form excitons. The use of phosphorescent

 Rare earth metal complexes in organic light-emitting electrochemical cells brings cost advantages due to the favorable emitter material with it. It will continue a process for producing a

Radiation emitting device indicated by the

Method steps A) providing a substrate on which a first electrode is arranged, B) producing and

Applying an organic solution to the first electrode, and C) applying a second electrode to the organic solution. In this case, the organic solution contains an ionic component and comprises a solvent and at least one phosphorescent rare earth metal complex. With this method, a radiation-emitting

Component be prepared according to the above statements. By the formulation that the organic solution contains an ionic component and comprises a solvent and a phosphorescent rare earth metal complex, it is understood that the ionic component in the solution is the phosphorescent rare earth metal complex and / or other components, such as matrix materials, are present in the solution which have ionic components.

The solvent for producing the organic solution may be selected from a group called PGMEA

(Propylene glycol monoethyl ether acetate), tetrahydrofuran,

Dioxane, chlorobenzene, diethylene glycol diethyl ether,

Diethylene glycol monoethyl ether, γ-butyrolactone, N-methylpyrolidinone, ethoxyethanol, xylene, toluene, anisole, phenetole, acetonitriles, and mixtures thereof. However, other organic solvents which are not explicitly mentioned here are also usable.

The application of the organic solution may be carried out by a method selected from a group consisting of

Spin Coating, Doctor Blades, Slot Coating, dip coating, spraying and printing includes. examples for

Printing techniques include flexographic printing, gravure printing, inkjet printing and screen printing. Thus, the organic solution can be applied by a wet chemical method, which allows the use of rare earth metal complexes

allows. An evaporation process is therefore not

necessary, which also thermally labile Rare earth metal complexes in the manufacturing process

can be used.

The organic solution can be dried before process step C). Thus, the solvent is removed, so that the organic layer, the at least one

phosphorescent rare earth metal complex is formed. Such a layer may, for example, have a thickness of 50 to 200 nm.

With the method, it is also possible to produce components which, in addition to the phosphorescent rare earth metal complex in the organic layer, have one or more matrix materials as described above.

It will continue to use a phosphorescent

Rare earth metal complex as a radiation-emitting material in a radiation-emitting device specified, wherein the radiation-emitting device is an ionic

Component having radiation-emitting organic

Layer has. With phosphorescent rare earth metal complex is that described in the above

Rare earth metal complex meant. The radiation-emitting component may be an organic light-emitting component

be electrochemical cell.

In the following figures and embodiments, the invention will be explained in more detail. Figure la shows the schematic side view of a

organic light-emitting electrochemical cell, Figure lb shows the schematic side view of another embodiment of an organic light-emitting

electrochemical cell, Figure 2 shows the schematic side view of a

organic light emitting diode,

FIGS. 3a to 3c show results of comparative measurements on an organic light emitting diode,

FIGS. 4a to 4d show characteristic measured values of an organic light-emitting electrochemical cell.

Figure la shows the schematic side view of a

organic light-emitting electrochemical cell

 (OLEEC). This has a substrate 10, on which a first electrode 20, which may be designed, for example, as an anode, is applied. On the first electrode 20 is a radiation-emitting organic layer 30 comprising an ionic component. A second electrode 40, for example an electrode, is on the organic

Layer applied and the layer stack finally encapsulated by means of an encapsulation 50. The encapsulation 50 can encapsulate the entire component, even at the lateral edges, which is not shown here for reasons of clarity.

The substrate 10 may comprise glass, for example. The first electrode 20 may be transparent, for example, so that the device is a bottom emitter. Materials of the first electrode 20 may be, for example, ITO, AZO or doped tin oxide. The second electrode 40 may include materials such as Au, AI and Ag included. If both electrodes 20, 40 are to be made transparent, the second electrode 40 may also contain, for example, ITO, AZO or doped tin oxide. Also, only the second electrode 40 may be formed transparent, which is a top emitter in the device.

The radiation-emitting organic layer 30 contains at least one rare-earth phosphorous complex as described above. Furthermore, matrix materials as stated above may be present in the organic layer 30. The rare earth metal complex may be anionic or

be cationic executed. In combination with

Matrix materials can be an ionic or neutral

Rare earth metal complex with an ionic matrix material, an ionic rare earth metal complex with a neutral matrix material or an ionic or neutral

Rare earth metal complex with an ionic matrix material, which additionally comprises further components, are present in the organic layer 30. The matrix materials can be selected as outlined above.

Figure lb shows the schematic side view of a

alternative embodiment of an organic

light-emitting electrochemical cell. Here is in

 In contrast to the embodiment of FIG. 1a, additionally a hole transport layer 25 is arranged between the first electrode 20 and the organic layer 30. The

Hole transport layer 25 may, for example, the first

Planarize electrode 20 and improved

Uniformity of the current distribution cause. FIG. 2 shows the schematic side view of an organic light emitting diode (OLED) in comparison to the embodiments of an OLEEC shown in FIGS. 1 a and 1 b. With respect to this figure, only those of Figures la and lb will be elements with different ones

 Reference numerals explained. The OLED according to FIG. 2 has a hole injection layer 31 on the first electrode 20. This can, for example, a 100 nm thick PEDO: PSS layer (PEDOT: PSS: poly-3, 4-ethylenedioxythiophen, with

Polystyrene sulfonate is doped). On top of this is the emission layer 32, for example a 30 nm thick layer comprising a matrix material and a

Rare earth metal complex comprises as emitter. On the

Emission layer 32 is a hole block layer 33 is arranged, which can be 20 nm thick example, and 2, 9-dimethyl-4, 7-diphenyl-1, 10-phenanthroline (BCP) may contain. When

Electron transport layer 34 is on the hole block layer 33, for example, a 30 nm thick Alq layer (Alq: tris (8-hydroxy-quinolinato) aluminum) applied. The second

For example, electrode 40 may be composed of a 0.7 nm-thick LiF layer and a 200 nm-thick Al layer, with the LiF layer serving for electron injection. The first electrode 20 may include ITO in this example. The OLED also has the encapsulation 55, which must be hermetically sealed compared to the encapsulation 50 of an OLEEC due to the reactive materials of the layer sequence.

With reference to the following embodiment, the

Production process of an OLEEC device shown:

The active area of an OLEEC device is about 4 mm ² . On a glass substrate 10 and an ITO deposited thereon. Anode 20 further layers are deposited by spin coating techniques or vapor deposition. A hole transport layer 25 made of PEDOT: PSS, as well as an organic layer 30 serving as ion conductor BMIM-PF ₆ (butylmethylimidazolium hexafluorophosphate), and optionally as further matrix materials S-TAD (2, 2 ', 7, 7' tetrakis (N , N-diphenylamino) -9,9-spirobifluorene), TCTA (4,4 ', 4 "-tris (carbazol-9-yl) triphenylamine) or TAPC (di- [4- (N, N-ditolyl-amino) All solutions are prepared prior to spin-coating with a 0.1 μm PTFE

 Filtered (polytetrafluoroethylene) filter. The wet film is dried for 2 h at 80 ° C in a vacuum oven. Finally, the cathode 40 consisting of a 150 to 200 nm thick Al layer is vapor-deposited and encapsulated with a glass cap 50 to interact with the organic layers

Air molecules and water to prevent.

Analogous to this method, it is also possible to produce OLED components.

To investigate electroluminescent properties of OLEEC devices and comparatively OLED devices, luminance-current-voltage measurements, so-called LIV measurements (at variable voltage) and lifetime measurements (at constant voltage) as well as spectral measurements

carried out .

For LIV measurements, the current density D in [mA / cm ² ] and the luminance L in [cd / cm ² ] as a function of the voltage U in [V] starting at -2V (time 0) to 11 to 17 V in steps measured from 1V. For lifetime measurements, the voltage U is set to a constant value in each case and the current and luminance D, L are sampled in steps of 1 s. The OLED current-voltage characteristic is measured, for example, by means of a Keithley SMU 236, a source measuring unit, ie a power supply with built-in current-voltage measurement. The luminance L is measured here by means of color-calibrated photodiodes (type 6514, Keithley Instruments). The measurement of the current and luminance D, L as a function of time is carried out for the OLEEC components with a life span measuring station Botest System OLT-3. EL spectra are detected by means of a spectral camera (PR650) in the visible wavelength range between 380 nm and 780 nm.

FIGS. 3a to 3c show the results of FIG

Comparative measurements performed on an OLED to provide evidence of the electroluminescence of the emitter class of rare earth metal complexes.

For this purpose, the rare earth metal complex (hereinafter also Eu complex) sodium tetrakis (dibenzoylmethane) europium (III)

([Eu (dpm) 4] Na) selected and first tested in an OLED device according to FIG. For this approach, the Eu complex was co-vaporized with the charge transport matrix TCTA (4,4 ', 4 "-tris (carbazol-9-yl) triphenylamine) to produce the emission layer 32 on a PEDOT: PSS layer 31 deposited

Layer sequence consists of:

 - Anode 20, ITO,

 - Hole injection layer 31 of PEDOT: PSS with a thickness of 100 nm

 Emission layer 32 of matrix material: Eu complex

(Ratio 90:10) with a thickness of 30 nm - Hole block layer 33 of 2, 9-dimethyl-4, 7-diphenyl-l, 10-phenanthroline (BCP) with a thickness of 20nm

 Electron transport layer 34 of Alq with a thickness of 30 nm,

- Cathode 40 containing an electron injection layer of LiF with a thickness of 0.7 nm and a 200 nm thick Al layer.

All layers except for the hole injection layer 31 are applied by vapor deposition. The hole injection layer 31 is applied by spin coating.

FIG. 3a shows the result of the LIV measurement on the OLED described above, in which the current density D is measured as a function of the voltage U. FIG. 3b correspondingly shows the luminance L as a function of the voltage U measured for the OLED described above. Thus, Figures 3a and 3b show characteristic graphs of the OLED. FIG. 3 a shows how the current changes as the voltage increases. The y-axis is logarithmic, so the increase of the current with the voltage is expotential, which corresponds to a diode characteristic. The current flowing through the component generates excitons which decay with the release of light. How this light output changes with the voltage and therefore the current is shown in FIG. 3b. From this can be, for example, the

Calculate efficiency.

Figure 3c shows the electroluminescence spectrum measured for the OLED described above. It is the relative

Intensity I _re i as a function of the wavelength λ in [nm]. It can be clearly seen that the device exhibits luminescence at a wavelength of 612 nm. in the

Operation, the OLED lights red. The electroluminescence in the OLED device can be attributed to the matrix having three functions

takes over: it transports electrons, blocks holes and serves as a host molecule for triplet states. All three

 Properties together promote the formation of triplet excitons in the matrix material, which can be referred to as a high energy host, which is then energy transferred to the Eu emitter as a guest molecule (low energy guest).

diffuse and radiantly recombine there.

In the following embodiment, the

Electroluminescence of rare earth metal complexes can be shown in OLEEC devices.

By way of example, the Eu complex sodium tetrakis (4,4,4-trifluoro-1- (2-naphthyl) -1,3-butanedione) europium (III)

([Eu (NTA) ₄ ] Na). The OLEEC component is composed of:

Anode 20 of ITO with a thickness of 100 nm,

 PEDOT hole transport layer 25: PSS having a thickness of 100 nm,

 organic layer 30 containing matrix material: Eu complex and an ionic liquid (IL) having a thickness of 80 nm to 100 nm,

 Cathode 40 made of Al with a thickness of 200 nm.

OLEEC devices with various organic layers 30 for a series of measurements are produced. The ionic liquid (IL) is imidazolium BMIM-PF ₆ im

Molar ratio matrix material + Eu complex: IL = 1: 1 used. As matrix materials come S-TAD, as well as cationic iTMCs (ionic transition metal complexes) such as Ir (ppy) 2 (pbpy) PF6 (bis [2- (4, 6-difluorophenyl) pyridinatoN, C2] iridium (III) [1,1'-dimethyl-3,3'-methylene-diimidazoline-2, 2'-diylidene] hexafluorophosphate) and Ir-749-PF6 (bis [2- (4,6-difluorophenyl) pyridinato-N, C ² ] iridium (III) [1,1'-dimethyl-3,3'-methylene diimidazoline-2, 2'-diylidene]

hexafluorophosphate, a blue emitting heteroleptic Ir (III) metal complex, used to improve charge transport and triplet-exciton transitions

enable .

As concentrations between matrix material and

Rare earth metal complex is selected 0: 100, 90:10, 70:30 and 50:50 vol%. Both the PEDOT: PSS layer 25 and the radiation-emitting organic layer 30 are applied by spin-coating. Matrix material and emitter are dissolved in anisole. The solids concentration in solution is 4% by weight for all subsequent mixtures.

In the following, the measurement series will be explained in more detail by OLEEC components having the following compositions of the organic layer 30 (see FIG.

Composition K: [Eu (NTA) ₄ ] Na + IL

Composition L: S-TAD: [Eu (NTA) ₄ ] Na (70:30) + IL

Composition N: Ir (ppy) ₂ (pbpy) PF ₆ : [Eu (NTA) ₄ ] Na (90:10) + IL

Composition 0: Ir-749-PF ₆ : [Eu (NTA) ₄ ] Na (90:10) + IL

Composition P: Ir-749-PF ₆ : [Eu (NTA) ₄ ] Na (50:50) + IL.

At least the use of the carrier-transporting matrix materials S-TAD, Ir (ppy) ₂ (pbpy) PF ₆ and Ir-749-PF ₆ allows a current to flow through the component. typical

Current-voltage characteristics of these matrix emitters are shown in FIG. 4a, in which for compositions K, , 0 and P the current density D as a function of the voltage U is shown.

In Figure 4b, the electroluminescence spectra of

Compositions 0 and P and compared to the

Composition S, in which no emitter, but only IL and the matrix material Ir-749-PF6 is present in the organic layer 30, is shown. The normalized intensity I _{n is} plotted as a function of λ.

In Figure 4b it can be seen that for the matrix Ir-749-PF6 a complete energy transfer from the Ir matrix material, which itself can emit, to the Eu complex with subsequent radiative recombination of the triplet excitons can be observed. The degree of energy transfer depends on the concentration of the Eu emitter in the matrix Ir-749-PF6. At a low

Concentration Ir-749-PF ₆ : [Eu (NTA) ₄ ] Na (90:10)

 (Composition O) is similar to the EL spectrum of that of a "pure" Ir-749-PF6 device (Composition S) .This OLEEC will be light blue in operation

Concentration (here 50:50, composition P) increases the tunneling probability for the excitation energy from the matrix material (high energy host) to the Eu emitter (low energy guest) with subsequent radiative recombination of the triplet excitons. Such OLEECs turn red during operation.

Figures 4c and 4d show typical OLEEC characteristics for compositions 0 at 6V and 9V, and P at 15V. FIG. 4c shows the current density D as a function of the time t in [min], FIG. 4d shows the luminance L in

Dependence of time t in [min]. It can be shown with FIGS. 4c and 4d that red emission of the Eu complex is based on the above

described host guest energy transfer for 15V

Forward voltage is observed.

Such a combination of cationic iTMC host

(Matrix material) and anionic Eu complex not only has the advantage of a possible incomplete energy transfer, so electroluminescence from both the host and the guest, and thus the possible realization of a two-color white, but could also be known by a host-guest principles of the OLED enhanced Coulomb exchange interaction between host and guest. The increased Coulomb coupling could self-assemble the overlap of the wave functions between the two species and thus the exciton diffusion, which in turn results in a more radiant yield

Exciton transitions could be increased.

The embodiments show that phosphorescent

Rare earth metal complexes in OLEEC devices

 Have electroluminescence and can be used as an emitter.

Solubilities of some exemplary Eu complexes in various solvents are also shown in Table 1 below. It can be seen that the solubility depends not only on the solvent but also on the choice

Ligands on the rare earth metal complex. The better the better

Solubility is, the easier the complexes can be deposited, that is, the easier the manufacturing process for producing an OLEEC.

In the table mean -: no solubility

 +: hardly solubility

 ++: average solubility

+++: good solubility

 ++++: very good solubility,

 [Eu (hfac) 4] Na: sodium tetrakis (1, 1, 1, 5, 5, 5

Hexafluoroacetoacetonate) europium (III),

 [Eu (hfac) 4] CTA: hexacetyltrimethylammonium

Tetrakis (1,1,5,5,5-hexafluoroacetoacetonate) europium (III),

Eu (TTA) 4] CTA: hexacetyltrimethylammonium tetrakis (2)

Theonyl trifluoroacetonate) europium (III),

 [Eu (PTA) 4] CTA: hexacetyltrimethylammonium

 Tetrakis (4,4,4-trifluoro-1- (2-phenyl) -1,3-butanedione) europium (111),

[Eu (NTA) ₄ ] Na: sodium tetrakis (4, 4, 4-trifluoro-1- (2-naphthyl) -1,3-butanedione) europium (III)

[Eu (NTA ₄ )] CTA: hexacetyltrimethylammonium

 Tetrakis (4,4,4-trifluoro-1- (2-naphthyl) -1,3-butanedione) europium (I I I),

 [Eu (dbm) 4] Na: sodium

 Tetrakis (dibenzoylmethane) europium (III),

[Eu (dbm) ₄ ] [C ₄ mim]: 1-butyl-3-methylimidazolium

 Tetrakis (dibenzoylmethane) europium (III),

[Eu (dbm) 4] CTA: hexacetyltrimethylammonium

 Tetrakis (dibenzoylmethane) europium (III).

Water ethanol dichloro-ether n-methane hexane

[Eu (hfac) ₄ ] Na +++ ++++ ++++ ++++ ++

[Eu (hfac) ₄ ] CTA +++ ++++ ++++ ++++ +++

[Eu (TTA) ₄ ] CTA + ++ ++++ +++ - [Eu (PTA) ₄ ] CTA - + ++++ +++ -

[Eu (NTA) ₄ ] Na - + ++++ +++ -

[Eu (NTA) ₄ ] CTA - + ++++ + -

[Eu (dbm) ₄ ] Na - - ++ - -

[Eu (dbm) ₄ ] [c4mim] - - ++ + +

[Eu (dbm) ₄ ] CTA - - ++ - -

Table 1

Solubilities of other complexes in various solvents are shown in the following Table 2:

 Table 2

In Table 2, the "+" and "-" symbols have the same meaning as in Table 1. In addition, mean:

[Tb (bpy) _2] [PF _{6] 3:} Di-2, 2 ^λ -bipyridylterbium (III) Trihexafluorophosphat

[Tb (phen) ₂ ] [PF ₆ ] ₃ : di-1,10-phenanthrolinterbium (III) trihexafluorophosphate

[Eu (bpy) ₂ ] [PF ₆ ] ₃ : Di-2, 2 ^λ- bipyridyl europium (III) trihexafluorophosphate [Eu (phen) ₂ ] [PF ₆ ] ₃ : di-1, 10-phenanthrolineuropium (III)

Trihexafluorophosphate.

Furthermore, synthesis examples of some exemplary rare earth metal complexes are given below:

1) Synthesis of hexacetyltrimethylammonium tetrakis (2-thionyltrifluoroacetonate) europium (III) (Formula 1)

Formula 1 In a 250 ml 2-necked flask, 1.18g

Cetylhexamethylammonium bromide and 2.67 g of 2-thyltrifluoroacetylacetone dissolved in 25 ml of ethanol and stirring at 60 ° C, a solution consisting of 15 ml

Ethanol and 1.1 g europium trichloride hexahydrate, added dropwise. After addition of 10 ml of 1N sodium hydroxide solution is stirred at 60 ° C for one hour. After cooling to room temperature, 100 ml of water are added to the reaction mixture, the chewing gum-like crude product settling on the flask wall. in the

The solvent is subsequently removed by means of a vacuum, the residue is admixed with 40 ml of n-hexane and stirred overnight. This forms a whitish suspension. The precipitate is filtered off and washed three times with a solution of ethanol and water in a ratio of 1: 1. After pre-drying under vacuum at 50 ° C, the complex becomes azeotropic

Distillation with cyclohexane completely dried.

This produces 2.26 g of product, which corresponds to a yield of 65.

 The product was determined by elemental analysis:

C H N

 Found 45.70% 4, 25% 1, 11%

 Calculated 46, 36% 4, 39% 1.09%

2) Synthesis of sodium tetrakis (4,4,4-trifluoro-1- (2-naphthyl) -1,3-butanedione) europium (III) (Formula 2)

Formula 2

Into a 250 ml two-necked flask, add 11 ml of an IM

Sodium hydroxide solution and 2.90 g of 4, 4, 4-trifluoro-1- (2-naphthyl) -1, 3-butanedione and 0.8 g of europium trichloride

Hexahydrate added. The reaction mixture is stirred at 50 ° C overnight. After that the solvent gets under

Removed vacuum, added the gum residue with 30 ml of n-hexane and stirred for one hour. The crude product is suspended. It is filtered off, washed with 30 ml of water and predried at 50 ° C under vacuum. Complete drying is achieved by azeotropic distillation with cyclohexane. This gives 2.20 g of a light yellow solid, which corresponds to a yield of 74%.

 The product is analyzed analytically by elemental analysis

demonstrated.

C H N

 Calculated 54, 41% 2, 61% 0.00%

 Found 54, 39% 2.62% 0.00%

The invention is not limited by the description with reference to the embodiments. Rather, the includes

Invention every new feature as well as every combination of

 Features, which includes in particular any combination of features in the claims, even if this feature or this combination itself is not explicitly in the

Claims or embodiments is given.

Claims

claims 1. Radiation-emitting component comprising a first electrode (20),  a radiation-emitting organic layer (30) on the first electrode (20), and  a second electrode (40) on the radiation-emitting organic layer (30), the organic layer (30) containing an ionic component and at least one phosphorescent rare earth metal complex. 2. Radiation-emitting component according to the preceding claim, wherein the organic layer (30) comprises at least one matrix material, wherein at least one  Rare earth metal complex and / or at least one matrix material are ionic. 3. Radiation-emitting component according to the preceding claim, wherein the matrix material from a group the ionic liquids, polymers, hole transporting small molecules, electron transporting small molecules, ionic transition metal complexes and Combinations thereof. 4. Radiation-emitting component according to one of preceding claims, wherein the phosphorescent  Rare earth metal complex is selected from a group, the anionic rare earth metal complexes of the general formula [Kat] ^{+ n} [M ^ i -L _x ) (T -L _y ) (i -L _z )] -n cationic  Rare earth metal complexes of the general formula [M (T -L _w ) (r | ^x -L _x ) (r | ^y -L _y ) († -L _z )] ^{+ n} [An] ⁿ and neutral Rare earth metal complexes of the general formula [M (T -L _w ) (r | ^x -L _x ) (r | ^y -L _y ) (r | ^z -L _z )] ^ü where L _w , L _x , L _y, and L _{z are} each for Ligand, M for a rare earth metal, η for the denticity of the ligand, Kat for counter cation, An Counter anion, n = 1, 2 or 3, and w, x, y and z are independently selected from the range of 0 to 8, and 6 <w + x + y + z <8. 5. Radiation-emitting device according to the preceding claim, wherein the rare earth metal from a group is selected, which includes Eu, Tb and Gd. A radiation-emitting device according to claim 4, wherein L _w , L _x , L _y and L _{z are} independently selected from a group comprising 2, 2 '-bipyridine derivatives, Phenanthroline derivatives, 2, 2 ', 2' '- terpyridyl derivatives,  Imidazoles, benzimidazoles, oxazoles, triazines, phthalocyanines, amino acids, 2, 6-bis (2'-quinolyl) pyridine, oximes, Nitroso compounds, amides, hydrazides, oxo compounds of N-heterocycles, crown ethers, pyridine derivatives with azo compounds, alcohols, phenols, polyalcohols, hydroaldehydes, ketones, Sulfonic acids, quinones, benzoquinones, anthraquinones, Macrocycles, sulfoxides, sulfonamides, thiols, thiocarboxylates, dithiocarbamic acids, thioureas, sulfur-containing Heterocycles, bistrimethylsilylamides, phosphines, Phosphine oxides, phosphoric acids and their esters, phosphorous acid and its esters, amides of phosphinic acid, amides of phosphonic acid, amides of sulfur and arsenic acids, hydroxo, nitrato, azido, halogeno, phosphato, sulfito, Sulfato, thiosulfato, carbonates, isocyanato, mono-, di-, tri-, tetra- and polyphosphate derivatives, cytosine derivatives, Coumarin derivatives, adenine derivatives, purine derivatives and Carboxylate derivatives includes. 7. Radiation-emitting component according to one of Claims 4 to 6, wherein the counter anions are selected from the group consisting of fluoride, chloride, bromide, iodide, sulfate, phosphate, carbonate, trifluoromethanesulfonate, trifluoroacetate, tosylate, bis (trifluoromethylsulfone) imide, tetraphenylborate, B ₉ C 2 H ₁₁ , hexafluorophosphate, Tetrafluoroborate, Hexafluoroantimonate, tetrapyrazolato borate, Fe (CNe) ³ , Fe (CNe) ⁴ , Cr (C ₂ O ₄ ) ^{3 "} , Cu (CN) ₄ ^3", and Ni (CN) ₄ ^{2 "} . 8. Radiation-emitting component according to one of  Claims 4 to 6, wherein the counter cations are selected from a group comprising metal cations, substituted or unsubstituted ammonium compounds and complex cations. 9. Radiation-emitting component according to one of preceding claims, wherein the first and / or the second electrode (20,40) are transparent. 10. Radiation-emitting component according to one of preceding claims, which is formed as an organic light-emitting electrochemical cell. 11. A method for producing a radiation-emitting component with the method steps  A) providing a substrate (10) on which a first electrode (20) is arranged,  B) producing and applying an organic solution to the first electrode (20), C) applying a second electrode (40) on the organic solution, wherein the organic solution contains an ionic component and at least one solvent and at least one phosphorescent rare earth metal complex. 12. The method according to the preceding claim, wherein for the preparation of the organic solution, the solvent is selected from a group comprising PGMEA, tetrahydrofuran, dioxane, chlorobenzene, diethylene glycol diethyl ether, Diethylene glycol monoethyl ether, γ-butyrolactone, N-methylpyrollidinone, ethoxyethanol, xylene, toluene, anisole, phenetole, acetonitrile, and mixtures thereof. 13. The method according to any one of claims 11 or 12, wherein the application of the organic solution by a method which is selected from a group comprising spin coating, knife coating, slot coating, dip coating, spraying and printing. 14. The method according to any one of claims 11 to 13, wherein the organic solution is dried before step C). 15. Use of a phosphorescent  A rare earth metal complex as a radiation-emitting material in a radiation-emitting device having an ionic-component radiation-emitting organic layer (30).