TW200846441A - Fluorescence main host material and organic electroluminescence device using the material - Google Patents

Abstract

The present invention provides a fluorescence host material and an organic electroluminescence device using the material. The fluorescence host material of the present invention has structures shown in the following chemical formula (I) or (II), where Ar.sub.1 and Ar.sub.2 independently represent phenyl, 1- naphthyl or 2- naphthyl. The organic electroluminescence device using the fluorescence host material can enhance the luminous efficiency of the organic electroluminescence device through cooperation of the fluorescence host material and fluorescence dopants.

Description

200846441 IX. INSTRUCTIONS OF THE INVENTION: TECHNICAL FIELD The present invention relates to a fluorescent main illuminant material, and further, the present invention relates to a high luminescence efficiency of using the aforementioned fluorescent main illuminant material. Electromechanical excitation device. [Prior Art] Recently, organic semiconductors and organic conductive materials have been enthusiastically studied, and in particular, organic light-cooling devices using light-emitting elements of organic semiconductors have been remarkably improved. Organic electroluminescence (OEL) is a phenomenon in which an organic substance is excited by a corresponding electric energy under a certain electric field. In 1963, when P〇pel et al. studied a single-wafer of anthracene of 1〇20-20m thick, it was first discovered that after applying 400 volts across the crystal, it was observed that the onion emits blue fluorescence, so that The research on electromechanical excitation light has taken the first step. However, due to the difficulty in growing single crystal and large area, and the required driving voltage is too large, the luminous efficiency is inferior to that of inorganic materials, so it has no practical value. Subsequently, Helfrich and Williams and others continued their efforts to study, φ reduced the voltage to about 1 〇 0 volts, obtained about 5% of the photon / electron external, quantum efficiency, but because the thickness of the single crystal is still too large, so the driving voltage is also High, the efficiency of converting electrical energy into light energy is too low. In 1982, Vincett et al. made a 50 nm thick onion film by vacuum evaporation, and further reduced the driving voltage to 30 volts to observe blue fluorescence, but the electron injection efficiency was too low and the onion film formation. The sex is not good, so its external quantum efficiency is only about 0.03%. After more than 20 years of sporadic development, there have been no major breakthroughs. It was not until 1987 that Eastman Kodak company Tang and Van Slyke first published organic light-emitting diodes (〇rganic 5 200846441 light-emitting diodes, OLEDs) that they had a breakthrough. They use aromatic diamine (HTM-2) as the material for the hole transport layer, and the film-forming property & hydroxyquinoline aluminum Alq3 (tris(84iydroxyquinolinato)aluminum(III)) = electricity = transport layer and luminescent material utilization The film is formed by vacuum evaporation to a film of 6 〇 to 7 〇 11111, and a magnesium alloy with a low work function is used as a cathode to improve the injection efficiency of electrons and holes. The organic small molecule luminescent material developed by the two electrodes is placed between them to emit light, which generates green light with a wavelength of 53 〇nm, which can exhibit low driving voltage and high quantum efficiency (> 丨% ) and the stability of components, etc., greatly improve the characteristics and practicality of organic small molecule electroluminescent devices. Then in 1990, Friend et al., Cambridge University, UK, subsequently published polymer light-emitting diodes (PLEDs), which spin-coated a total of plutonium molecules PPV (p〇ly (p-phenylene vinylene)) as a light-emitting layer, a polymer electroluminescent device having a single-layer structure, which has a simple process, good mechanical properties of a ruthenium molecule, and semiconductor-like properties, so that a conjugated polymer luminescent material is obtained. Research in the field has developed rapidly. It is worth noting that OLED φ not only self-illuminates, but also does not require a backlight module, and has low driving voltage, high brightness, high contrast, wide viewing angle, fast response, and simple structure compared to the current FPD with LCD as the mainstream. , ultra-thin film, • light weight and other advantages, can be effectively applied to lighting or made into displays, photoelectric couplers, etc. If fabricated on a flexible substrate such as a plastic substrate, the device can be bent, folded and portable, and due to the process Simple, it is expected to significantly reduce costs. At present, more than 80 companies around the world have been attracted to invest heavily in the development of organic electroluminescent display technology, which has become the mainstream of another display technology. In 1997, Pi〇neer of Japan first published a low-molecular monochromatic (green) passive display that successfully used organic electroluminescent display technology.

It is applied practically on the panel of automotive instruments. Since then, the organic electroluminescent display has been commercialized and has been applied to small-sized panels, such as the 1998 TDK Corporation, 2002 Sic Bo Technology, Samsung, NTT Do Co Mo's color mobile phone, 2003 Kodak digital camera. Japan pi〇neer company and Kodak Kodak also cooperate small! The production of 单色LED monochrome and multicolor displays has been officially applied to Motorola phones, and Sanyo has also collaborated with Kodak to produce small-size full color OLED samples. It claims to be mass-produced after 2 〇〇 1 year; Chi Mei Company has also released an active color display of more than 10 inches, making the organic electro-excitation technology more advanced. However, until now, there are still some areas for further improvement, including its color saturation, stability, luminous efficiency and longevity. This is closely related to the nature and process of the material itself. If it can break through, it should be expected to become a future display. the trend of. The luminescent material is the most important material in the organic electroluminescent device. A good luminescent material must satisfy the four conditions · high quantum efficiency fluorescence characteristics, and the fluorescence spectrum is mainly distributed in the visible light region of 400 to 700 nm. (2) Good semiconductor characteristics, high conductivity, ability to conduct electrons or holes, or both; (3) good film formation, pinholes in tens of nanometer films; 4) Good thermal stability. 'Most of the electron transport layer and the hole transport layer can be used as luminescent materials in the visible region. Since most organic materials exceed a certain concentration, they are self-sufficient or self-sufficient. The problem of concentmtion quenching leads to a broadening of the emission peak or a 3 = red shift. Therefore, the fluorescence is doped in a low concentration manner in a fluorescent main luminescence with a certain carrier property. The body... is used as a dopant emitter. Several design considerations for the use of organic electroluminescent bamboo shoots to fluoresce the main illuminant materials and fluorescent dopants are: (1) technology 200846441 and m two have fluorescent efficiency; (2) fluorescent dopants The absorption spectrum and the emission spectrum of the a-light emitter material should have a good overlap, so that the energy is efficiently transmitted from the host to the guest; (3) there is a red peak ' and the emission peak is as narrow as possible to maintain the purity of the light color. f(4== Good, can be evaporated. ()%疋In recent years, the industry has devoted itself to the research of organic electroluminescent materials. It has a good result. Red, blue and green are the three primary colors of light, good two. The second rate and the solid color are the basic requirements for achieving a full-color display. In the patent publication of 2GG!_335516, which produces a color, the excitation element, and the luminescent layer of the luminescent layer are disclosed. Light main illuminant material structure two =

U.S. Patent No. US-A-0,050,0,058,017 to Kodak Corporation discloses an organic electroluminescent device, and a fluorescent main illuminant material of the luminescent layer is as follows: ~ Photograph 8 200846441

S4 However, the invention of this patent is the same as the sister of the present invention, and the blue fluorescent conversion structure disclosed in this patent is different, and the photoelectric characteristic is not the material (CIEy > 0.18). Many debris is not as a deep blue main hair

In addition, Covion's European Union's special wavelength of light is deeper than the deep blue. $光林*=655359 reveals a kind of miscellaneous material that can effectively raise the material 'when it is with glory. However, the luminescence efficiency of the materials requested in this patent and the separation and purification of the isomers are not easy::: The material is associated with a shorter spectral property. And only one of them is

In view of the shortcomings of the prior rain technology, the present invention attempts to develop a fluorescent main illuminant material, which has a wide energy difference between the last filled domain and the lowest unfilled domain (HOMO/LUMO). It has a deep blue light photoluminescence spectrum (PL), which in turn can be combined with a deep blue fluorescent dopant (a material with a shorter ultraviolet absorption spectrum and a shorter fluorescent emission spectrum). The preferred spectral overlap integral (J) improves the luminous efficiency of the organic electroluminescent device. 9 200846441 SUMMARY OF THE INVENTION In view of the deficiencies of the prior art, the object of the present invention is a light-based illuminant material. Compared with the conventional fluorescent main hair, the luminescent light main illuminant material has a lifting color C, the aging rate, high life and easy synthesis and purification. 'Lighting of matter' A another object of the present invention is to provide a high luminous efficiency: (10)^ of the light-emitting device

In order to achieve the above object, the fluorescent main light-emitting material of the present invention has a structure represented by the chemical formula (I) or (II): ', /,

In JL, Δ , (H); f Ah and Ah are independent representatives of phenyl, naphthyl or 2 茇 in the implementation of the rut, the present invention, the following chemical formula: the main ^ cutting material Department 200846441

It is characterized in that the above-mentioned fluorescent main illuminant material is contained in the luminescent layer. In a preferred embodiment, the luminescent layer of the organic electroluminescent device of the present invention further comprises a deep blue fluorescent dopant, preferably having a deep blue fluorescent dopant at Commission Internationale d' Exclairage (ClEx , y) coordinates have CIExS0.15, CIEyS0.18. 11 200846441 In a more preferred embodiment, the luminescent layer of the organic electroluminescent device of the present invention comprises a deep blue fluorescing dopant of the formula:

f ( BD-2 ). [Embodiment] The fluorescent main light-emitting material of the present invention has a structure represented by the following chemical formula (1) or (II):

12 (I), 200846441

Αϊ 2 (II); wherein ΑΓι* Ah is independently represented by phenyl, naphthyl or 2-naphthyl. _ In the current selection of the luminescent layer material of the organic electroluminescent device, a fluorescent main illuminant material is usually used together with the design of a camping light to achieve the effect of the electroluminescence, so that the organic electroluminescent material is Design and selection > The first thing to consider is that the color and molecular fluorescence or phosphorescent conversion efficiency of the material molecule 'based on the above objectives' must fully understand the domain state of the molecule, such as the effect of the configuration on the overlap of the orbital domain. ^, The structural characteristics of the inventive phosphorescent illuminant material are designed to introduce a naphthyl _9_ fluorene functional group in the 7 Γ-package subsystem, thereby changing the molecular photovoltaic properties. Since a large steric hindrance space is generated between 1-naphthyl and anthracene (for example, the fluorescent main light-emitting material ADN of the prior art and the material of the present invention φ are different, the naphthyl group and the anthracene of the present invention) The twist angle between the two is 86.477 and the twist angle between the 2-naphthyl and anthracene of ADN is 74 956.), so the 1 ^ base _9_en functional group has an effect on the non-localized redundancy system. The electron density of the skeleton II decreases, which leads to the highest occupied domain (Ή〇Μ〇) = energy level, and the purpose of increasing the HOMO/LUMO energy gap is achieved. Therefore, 2 is a 1-naphthyl-9-fluorene functional group as a substituent of the fluorescent main illuminant material, and the group can be used as a series of fluorescent main illuminant materials of the present invention. Photoluminesent spectrum (PL). In a preferred embodiment, the fluorescent primary illuminator of the present invention is a compound of the following chemical formula: the leaf system is 13 200846441

The energy gap Eg^3 〇〇eV of the compound of the present invention is used to have a deep blue light excitation spectrum and can be used as a deep blue light-emitting material & The organic electroluminescent device of the present invention comprises a layered structure arranged in the following order: a transparent substrate, an anode layer, a hole transport layer, a light emitting layer, an electron transport layer and a cathode layer; wherein the anode layer and the cathode layer The system & does not contact the external power source to form an electrical path, and in addition to the wide range of light emission, the selection of the material of each layer of the pot is a common knowledge in the art without limitation, for example, the transparent substrate can be light transmissive. The inflexible glass substrate 200846441 or a flexible transparent organic polymer material; and the anode layer may be indium tin oxide or the like. The organic electroluminescent device of the present invention is characterized in that the above-mentioned fluorescent main emitter material is contained in the light-emitting layer. In a preferred embodiment, the anode layer and the hole transport layer may further comprise a hole injection layer; the electron transport layer and the cathode layer further comprise an electron injection layer, wherein the hole injection layer and The material of the electron injecting layer is also a common knowledge in the art without limitation. φ In the preferred embodiment of the cancer, the luminescent layer of the organic electroluminescent device of the present invention further comprises a deep blue fluorescent dopant, and the dark blue fluorescing impurity selected is more than the lanthanide in C〇mmissi〇n jnternati The 〇naie d Exclairage (CIEx,y) coordinates have CIEx $ 〇· i 5,CIEy ' 〇] 8 characteristics. The common characteristics of these dark blue fluorescent dopants are shorter UV absorption spectrum and shorter Fluorescent spectrum. The second ++ is due to the 2H〇m〇/lum〇 energy gap of the fluorescent main illuminant material of the present invention, which has an indigo blue excitation spectrum. According to the energy transfer mechanism, the fluorescent main emitter material of the present invention has better energy conversion efficiency (spectral overlap integrd, J) for the deep blue glory, and thus can improve the dark blue fluorescent blend. Luminous efficiency and longevity of debris. Suitable for use in the dark blue glory of the organic electroluminescent light-emitting layer of the present invention, the inclusions of the impurities include, but are not limited to, the compounds shown by the following chemical formulas:

(BD-1, TBPE) or 200846441

f (BD-2) 〇 The following embodiments are described in the following paragraphs to understand the advantages of the present invention. 1 non-φ Example L Synthesis of the fluorescent main light-emitting material of the present invention 2-(3T-Bromo-Lianmu-4-Naphthalene

OH

Under nitrogen, put 10.52 g of 2-(4-boronic acid-phenyl)-naphthalene, 1 gram of disc-> stinky, 11.6 g of potassium carbonate (dissolved in 35 ml of water first), 100 mi of tetragas Fu and 0. 8g of tetrakis(triphenylphosphine)palladium, reflux reaction overnight (20 hours plant A, add water to force solids, filter to take solids, dry, stupid and recrystallize, ^, extract solids, The finished product was dried up to 6.75 g, purity 98.1%, yield 53 5% ° [HPLC conditions] column: Rjp-8, flow rate: 1·0 ml/min, CH3CN: Η2〇=8 · 2 2-(4 Synthesis of bromine-biphenyl-4-yl V naphthalene

16 200846441 Under nitrogen, put 10.55 g of 2-(4-boronic acid-phenyl)-naphthalene, 10 g of each broken-bromobenzene, η·7 potassium carbonate (dissolved in 35 ml of water first), 100〇11 tetrahydroquinone And 0. 8 g of tetrakis(diphenylphosphine) saturated, reflux reaction overnight (2 hrs), cooling, adding water to extract solids, filtering to take solids, drying, toluene recrystallization, ^ filter solids 'drying finished products 7·19 g, purity 98.5%, yield 57·〇%. Synthesis of a group-linked cage -3-yl Vt

5 g of 2-(3,-bromo-biphenyl-4-yl)-naphthalene, 5.81 g of 9-boronic acid-10-naphthalen-1-yl-indole, i〇〇mi tetrahydrofuran, 4 61 were placed under nitrogen. Potassium carbonate (dissolved first in 16.5 ml of water) and 〇·48 g of tetrakis(triphenylphosphine), refluxing for 4 hours, cooling to room temperature, pouring the reaction into water, stirring to solidify, and filtering for solids' Drying, recrystallizing with benzene, cooling, filtering, taking solid, drying, to obtain 4.55 g of finished product, purity 99.25%, yield 56%. The purity of the product after sublimation was 99.8%. Melting point: 301.4 ° C, Tg point: 141.7 ° C. [HPLC conditions] column: Rp_8, flow rate: 1. 〇mi/min, CH3cN: 100% 4 NMR (400 MHz) Spectral data: δ 8.05-8.09 (m, 2H), 8.01-8.03 (d, 1H), 7 ·82-7·91 (m,11H),7·68-7·76 (m,2H),7·57-7·59 (m,2H),7.41-7.54 (m,6H),7·32 -7·35 (m,2H),7·16-7·25(πι,4Η) 17 200846441 3”-Bromo--"Ι,ΓΑ,ΓΊ合三笨之合成

12.6 g of 4-boric acid biphenyl, 15.0 g of 3-indene-bromobenzene, 17.4 g of potassium carbonate (dissolved in 52.5 ml of water), 75 ml of tetrahydrofuran and 2.75 φ g of tetrakis(triphenylphosphine) were added under nitrogen. Palladium, reflux reaction overnight (20 hours), cooled to room temperature, the reaction solution was poured into water and stirred to solidify, solids were collected by filtration, dried, recrystallized with benzene, cooled, filtered, solid, dried, The finished product is 8.2 g, the purity is 98%, and the yield is 50%. [HPLC conditions] column ·· RP-8, flow rate: 1.0 ml/min, CH3CN: H20=8: 2 9_naphthalene-1-yl-10-"U':4'J"1 Liansanmo-3 - Synthesis of basal-onion (Inv2)

5 g of 3"-bromo-[1, hydrazine; 4', hydrazine] triphenyl, 7.45 g of 9- phthalic acid-10-cai-1 -yl-en, 100 ml of tetrazole 11 South were placed under nitrogen. 5.15 g of carbonic acid (first dissolved in 19 ml of water) and 0.56 g of tetrakis(triphenylphosphine), refluxing for 4 hours, cooling to room temperature, pouring the reaction into water, stirring to solidify, and filtering to obtain a solid. Drying, recrystallization with toluene, cooling, filtration, taking solid, drying, 18 200846441 The finished product is 5·9 g, the purity is 99. 2%, the yield is 68.6%. The purity of the product after sublimation purification is 99.7%. Melting point: 286.4° C, Tg point: 132.5 ° C. [HPLC conditions] column: RP-8, flow rate: 1·0 ml/min, CH3CN: H20=95: 5 h NMR (400 MHz) spectral data: δ 8.05-8.07 (d, 1Η),8·00-8·02 (d,1Η),7.77-7.87 (m,6H),7.62-7.72 (m,6H),7·56·7·58 (m, 2H),7.43-7.53 (m,5H),7.31-7.35 (m,3H),7·19-7·24 (m,4H) • 1_-—(3Ά-biphenyl-4_农)_荇

HO

1 〇·56 g of 1-(4-boronic acid-phenyl)-naphthalene, ΐ〇·〇2 g of 3-moth-bromobenzene, and 11.6 potassium carbonate (dissolved in 35 ml of water) were placed under nitrogen. 1〇〇ml tetrahydrofuran, • 0·8g of tetrakis(triphenylphosphine)palladium, reflux reaction overnight (20 hours), cooling, adding water to solidify, solid by filtration, drying, recrystallization of toluene, filtration The solid 'dryed the finished product 7.32 g, the purity was 98.5%, and the yield was 58.0%. g::naphthalene-1-yl-丄0-(4'-naphthalene:1]_: cap_linking base_3 base) U ιην 3) synthesis 200846441 Putting 5.1 g 1-(3) under chaos ,备联笨基·4_基)_Cai, 5 9 gram 9-boric acid-10-naphthalene-1 prepared hui, 100 ml tetrahydrofuran, 4 gram potassium carbonate (first ^ 16.5 ml water) and 0.49 g of tetrakis(triphenylene), reflux reaction 4 small Γ to room temperature: pour ί liquid into the water to stir the solids, transition ^ ancient ^, dry 'toluene recrystallize, cool, transition Take a solid, for dry, and pay 4.71 g of finished product with a purity of 99.25% and a yield of 58%. The purity of the product after sublimation is 99.6%. , melting point · · catching ~ point: (10) 宂 [HPLC conditions] column: (four), flow rate: U) m 100%

Adding touch (4GGMHZ) spectral data: δ 8 team 8 G9 (m, 2H), 7 82 7 95 (m, 9H), 7.58-7.76 (m, 5H), 7.41-7.56 (m, 6H), 7.30-7.35 (m, 4H), 7.16-7.25 (m, 4H)

[HPLC conditions] column, flow rate: j 〇 (four) minutes (3) 3Cn: 100% purity 99.5%. 20 200846441 !H NMR (400MHz) spectral data: δ 8·05-8·09 (m, 2H), 8.01-8.03 (d, 1Η), 7·80-7·93 (m, 11Η), 7·58 -7·76 (m, 4Ή), 7·41·7·54 (m, 6H), 7.32-7:35 (m, 2H), 7·14-7·25 (m, 4H) Comparative example: Previous Preparation of Fluorescent Main Luminescent Material of Technology 9-Naphthalene_2-yl-10_"1,1';4',1''1,3,3,3,3-onion (^11-1)

Under nitrogen, 3.1 g of 3',-bromo-[1,Γ; 4,1,]-triphenyl, 5.0 g of 9-butyric acid-10·naphthalen-2-yl-indole, 60 ml of tetrahydrogen were placed.吱 、, 3.3 g of carbonic acid unpacked (dissolved first in 10 ml of water) and 〇·34 g of tetrakis(triphenylphosphine)palladium, refluxed for 4 hours, cooled to room temperature, and poured into water to stir to solidify. The solid was collected by filtration, dried, recrystallized with benzene, cooled, filtered, solid, and dried to obtain 4·1 g of the finished product, purity 99.1%, yield 77.0%. The product was sublimed and purified to a purity of 99.6%. Melting point: 322.6. (:, Tg point··124.8Χ. [HPLC conditions] column: RP_8, flow rate·· 1.〇ml/min, CH3CN: H20=95: 5 4 NMR (400MHz) Spectral data: δ 8·00-8 · 08 (m, 2H), 7.90-7.98 (m, 2H), 7.77-7.86 (m, 7H), 7.57-7·73 (m, 9H), 7.42-7.51 (m, 3H), 7·28- 7·37(πι5 5H) Example 2·Light-emitting device test data The device tested in this example has a structure including 1) a glass substrate, 2) ΙΤΌ, 3) a hole injection layer (HIL), and 4) a hole transport layer ( HTL), 5) luminescent layer (package 21 200846441 containing fluorescent main illuminant material and fluorescent dopant), 6) electron transport layer and 7) cathode. The cathode system consists of 0.7 nm LiF and 150 nm A1. The organic electroluminescent device as shown in the first figure was prepared by vacuum evaporation, wherein the blue light main emitter material of the comparative example was ADN and BH-1, and the fluorescent dopant system was BD-1 (TBPE) and The chemical structure of BD-2 is as follows:

f BD-2 The composition and thickness of the hole injection layer, the hole transport layer, the light-emitting layer and the electron transport layer in the above-mentioned organic electroluminescent device, and the test results of the components thereof are listed in Table 1 below: 22 200846441 Power Efficiency # 2.19 2.14 2.17 L84 1.74 1.47 3.96 3.70 3.84 3.37 3.03 y—< m luminous efficiency # 4.26 4.10 4.16 3,62 3.22 2.91 8.55 8.00 8.30 7.28 6,55 6.77 CIE* (0.14, 0.15) (0·14,0 ·15) (0·14, 0·15) (0.14, 0.15) (0.14, 0.16) 1(0.14,0,7) (0.15, 0.17) (0.15, 0.16) (0.15, 0.16) (0.15, 0.16) (0.15, 0.18) (0.15, 0.18) Electron transport layer (20 nm) Alq3 Alq3 Alq3 Alq3 丨Alq3 1 i Alq3 Alq3 Alq3 Alq3 Alq3 Alq3 Alq3 Luminescent layer (25 nm) Fluorescent dopant BD-1 BD-1 BD- 1 BD-1 | BD-1 BD-1 BD-2 BD-2 BD-2 BD-2 BD-2 BD-2 Main illuminant material Inv-1 Inv-2 Inv-3 Inv-4 ADN BH-1 Inv -1 Inv-2 Inv-3 Inv-4 ADN BH-1 Hole Transport Layer (20 nm) NPB NPB NPB NPB i NPB NPB NPB NPB NPB NPB NPB NPB Hole Injection Layer (60 nm) CuPC CuPC CuPC CuPC CuPC CuPC CuPC CuPC CuPC CuPC CuPC CuPC Example 1 Example 2 Example 3-1 Example 4 I Comparative Example 1 Comparative Example 2 Example 5 Example 6 Example 7 Example 8 Comparative Example 3 Comparative Example 4

e(N回#Μ^^Νδο/νε 03蛘, 200846441 It can be seen from the above table that the dark blue main illuminant material of the present invention (hvd) is in comparison with the group of BD_1 or BD_2 dark blue fluorescent dopants. , InV-2, InV-3, Inv-4) have higher luminous efficiency and power efficiency than the deep blue main materials of the prior art, (AND, BH-1). The second figure is the hole of ϊην] of the present invention. The spectrum of the spectrum is located at 412 nm and /32, and further the spectrum of the pores of the pores is combined with the precursors of the precursors ADN and BH_1 for the absolute intensity of pl. The stereoscopic phase is more obvious than that of ^. Therefore, the glory spectrum of Ao and BH·1 is due to T!: 夕夕. In addition, according to the F6rSter energy transfer mechanism, the overlapping area of the spectrum of ^ Μ· j BD·2 is larger. Therefore, when using ^^咖2 in the luminescent layer, its luminous efficiency will be significantly improved. «^ ;.Ιην'2'Ιην-3 ^lnv-4 ^ ^ ^ Absolutely strong; ^ T Bar versus intensity graph' Among them, the ¥ axis is normalized after PL X2; 'Γ:3 ^ InV"4 is the absolute intensity. It can be seen from the figure; the second is the table, and the fluorescent light is emitted. The invention uses the present invention to improve the luminous intensity of the uv_2 and the hull 配合2, and the absolute intensity values of the uv and BH_1 absolute intensity maps and BD] in the ADN and BH^ y-axis normalization, Absorptive absolute sound, by absolute intensity of PL, and BD-1 represents UV and fluorescent doping itηη_9θ. It is known that the overlap spectrum of the prior art fluorescent main emitter material emitter material is not as in the present invention. Fluorescent main - the picture shows the current density / luminous efficiency diagram of Inv-1, Inv_2, Inv 3, inv 4, adn and bh i 24 200846441 respectively doped 1 (TBPE) households. At the same current density, The neon light-emitting material of the present invention (5), I: 2, Inv_3, Inv_4) has a higher luminous efficiency than that of the prior art camping main illuminant material. fb® ^lnv-l; Inv- 2. Inv_3 ^ Inv.4 ) The spectrum of the electro-excitation light emitted by the Inv_3 ^ Inv.4 ) is shown in the figure. The organic device of the luminescent layer and the fluorescent dopant BD·1 can emit blue light. For the Inv-Bu Inv_2, Inv_3, and Inv_4 pL absolute = sound intensity map, where the ¥ axis is normalized: 'In BD-2 generation The table UV absorbs the absolute intensity. Although the present invention, the spectrum overlap of the illuminant material and the BD-2 is not as good as that of the ribs, but it is superior to the prior art fluorescent main illuminator. The current density/luminescence efficiency graph obtained by A ^ ^ ImM ' InV_2 ' InV_3 ' Inv·4, ADN and BH-1 2-3, the compound of the present invention has a higher luminous efficiency under the same electric charge. The /t picture is ImM, InV_2, InV_3, and InV·4, respectively, doped with BD-2 main 'light η light spectrum. The figure shows that the luminescent layer of the present invention has the luminescent emission 4 material and the light dopant rib·1 The organic electroluminescence excitation light I can be used to raise the fluorescent light. The illuminating filament illuminator has the luminous efficiency and the lifetime of the debris, and the organic electroluminescent device which is easy to incorporate the present invention can emit deep blue light. And different 鬲 luminous efficiency. 25 200846441 Other Embodiments All of the features disclosed in this specification may be combined with other methods, and each of the features disclosed in this specification may be selectively replaced with the same, equal or similar purpose features, thus In addition to the particularly salient features, all of the features disclosed in this specification are only one of the equivalent or similar features. While the invention has been described above in terms of the preferred embodiments thereof, it is not intended to limit the invention, and various modifications and changes can be made without departing from the spirit and scope of the invention. 26 200846441 [Simple description of the diagram] The first diagram is a schematic diagram of an organic electroluminescent device. The second picture is the PL spectrum of Inv-1. The third graph is the absolute intensity of UV absorption of the absolute intensity of pL of Inv], ADN, and BH4. _ The fourth figure is the ρτ of Ιην·1, Ιην_2, ιην_3, and hv-4. The absolute absorption of UV absorption of the graph and BD_i. % versus intensity The fifth figure shows the absolute intensity map of the PL and the absolute intensity of the UV absorption of ADN and BH-1. , ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, 7. The graph shows the spectrum of the electrical excitation light obtained by injecting BD-1^βΡΕ into InV_1, InV·2, Μ·3, and InV_4, respectively. The eighth figure is the absolute intensity map of Inv-1, Inv_2, Inv_3, and Inv-4 μ, a graph 盥> ττ ^ absolute intensity port /, UV absorption. The nine figures are the current density/luminescence efficiency of Inv-1, Inv-2, Inv-3, Inv-4, AC)Kr t /> -λ N and BH-1 Knife 谬 BD-2 . The tenth figure shows the spectrum of the electroluminescence obtained by Inv-1, Inv-2, Inv-3 and Inv-4, respectively. >Miscellaneous purchase [Main component symbol description None 27

Claims (1)

200846441 X. Patent application garden: 1. A fluorescent main illuminant material having the structure shown by the following chemical formula (1) or (II): (I) (II); wherein, VIII and Ar2 independently represent a phenyl group, a 1-naphthyl group or a 2-naphthyl group. 2. The fluorescent main illuminant material according to claim 1 is represented by the following chemical formula. Compound: (Inv-1) 28 200846441 a layered structure, a transparent substrate, an anode layer, a hole transport layer, a light emitting layer, an electron transport layer, and a cathode layer; wherein the anode layer and the cathode layer are respectively in contact with an external power source to form an electrical path, the organic motor The illuminating device is characterized in that it comprises a luminescent layer, and comprises a fluorescent main illuminant material according to claim 1 of the patent application. 4. The device of claim 3, wherein the anode layer and the hole transport layer further comprise a hole injection layer. 5. The device of claim 3, wherein the electron transport layer and the cathode layer further comprise an electron injection layer. 6. The device of claim 3, wherein the luminescent layer further comprises a deep blue fluorescent dopant. 7. The device of claim 6, wherein the aforementioned dark blue fluorescent dopant has CIExg (U5, CIEyS (U8) characteristics in the coordinates of Commission Internationale 29 200846441 d' Exclairage (CIEx, y) 8. The device according to claim 7, wherein the dark blue fluorescent dopant is a compound represented by the following chemical formula: 30