JPH11339957A - Method of manufacturing light emitting display - Google Patents
Method of manufacturing light emitting displayInfo
- Publication number
- JPH11339957A JPH11339957A JP10144901A JP14490198A JPH11339957A JP H11339957 A JPH11339957 A JP H11339957A JP 10144901 A JP10144901 A JP 10144901A JP 14490198 A JP14490198 A JP 14490198A JP H11339957 A JPH11339957 A JP H11339957A
- Authority
- JP
- Japan
- Prior art keywords
- solvent
- light
- emitting display
- substrate
- solution
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 14
- 239000002904 solvent Substances 0.000 claims abstract description 34
- 239000000463 material Substances 0.000 claims abstract description 30
- 238000000034 method Methods 0.000 claims abstract description 25
- 239000000758 substrate Substances 0.000 claims abstract description 22
- 239000002243 precursor Substances 0.000 claims abstract description 13
- -1 polyphenylene vinylene Polymers 0.000 claims abstract description 12
- 238000009835 boiling Methods 0.000 claims abstract description 11
- 238000001035 drying Methods 0.000 claims abstract description 9
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 16
- 235000011187 glycerol Nutrition 0.000 claims description 8
- 238000007641 inkjet printing Methods 0.000 claims description 7
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical group OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims 3
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 claims 2
- 239000007772 electrode material Substances 0.000 claims 1
- 229920000553 poly(phenylenevinylene) Polymers 0.000 abstract description 10
- 238000007599 discharging Methods 0.000 abstract description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 8
- 239000011521 glass Substances 0.000 abstract description 8
- 239000012299 nitrogen atmosphere Substances 0.000 abstract description 4
- 239000005518 polymer electrolyte Substances 0.000 abstract description 3
- 238000001228 spectrum Methods 0.000 abstract description 2
- 230000008021 deposition Effects 0.000 abstract 1
- 238000002189 fluorescence spectrum Methods 0.000 description 7
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 5
- 238000000059 patterning Methods 0.000 description 5
- 238000007740 vapor deposition Methods 0.000 description 5
- 238000010304 firing Methods 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 238000000295 emission spectrum Methods 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 238000004544 sputter deposition Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- KLCLIOISYBHYDZ-UHFFFAOYSA-N 1,4,4-triphenylbuta-1,3-dienylbenzene Chemical compound C=1C=CC=CC=1C(C=1C=CC=CC=1)=CC=C(C=1C=CC=CC=1)C1=CC=CC=C1 KLCLIOISYBHYDZ-UHFFFAOYSA-N 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 239000010408 film Substances 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 238000000206 photolithography Methods 0.000 description 2
- PYWVYCXTNDRMGF-UHFFFAOYSA-N rhodamine B Chemical compound [Cl-].C=12C=CC(=[N+](CC)CC)C=C2OC2=CC(N(CC)CC)=CC=C2C=1C1=CC=CC=C1C(O)=O PYWVYCXTNDRMGF-UHFFFAOYSA-N 0.000 description 2
- 229940043267 rhodamine b Drugs 0.000 description 2
- 238000004528 spin coating Methods 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- YRCAUVMBMCBDBX-UHFFFAOYSA-N N-[4-(4-aminophenyl)phenyl]-2,4-dimethylaniline Chemical compound CC1=CC(C)=CC=C1NC1=CC=C(C=2C=CC(N)=CC=2)C=C1 YRCAUVMBMCBDBX-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 125000000319 biphenyl-4-yl group Chemical group [H]C1=C([H])C([H])=C([H])C([H])=C1C1=C([H])C([H])=C([*])C([H])=C1[H] 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 150000004985 diamines Chemical class 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000005525 hole transport Effects 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
- H10K71/40—Thermal treatment, e.g. annealing in the presence of a solvent vapour
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
- H10K71/10—Deposition of organic active material
- H10K71/12—Deposition of organic active material using liquid deposition, e.g. spin coating
- H10K71/15—Deposition of organic active material using liquid deposition, e.g. spin coating characterised by the solvent used
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Electroluminescent Light Sources (AREA)
- Luminescent Compositions (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は発光ディスプレイの
製造方法に係わり、更に詳しくは、吐出装置を用い、発
光材料を吐出することにより発光層を形成する発光ディ
スプレイの製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a light emitting display, and more particularly, to a method for manufacturing a light emitting display in which a light emitting material is discharged by using a discharge device to form a light emitting layer.
【０００２】[0002]
【従来の技術】近年液晶表示体がワードプロセッサー、
パーソナルコンピュータ等の表示部として盛んに用いら
れている。この液晶表示体は非発光素子であり明るさの
点、特に反射型ディスプレイで用いるとき問題となって
いる。ここへきて薄型、軽量の特徴を有する有機の発光
材料（以後有機ＥＬという）を用いた発光ディスプレイ
が注目されている。この発光ディスプレイの断面図を図
１に示す。図において１はアルミニウム電極を、２は有
機ＥＬ材料を、３はＩＴＯ透明電極を、４はガラス基板
を、５は電源をそれぞれ示す。この発光ディスプレイの
作成方法は以下の通りである。まず、透明基板上にスパ
ッター法、又は蒸着法等によりＩＴＯ透明電極を付け
る。この後、ホトリソグラフィー法により所望の形状の
電極とする。しかる後、スピンコート法、蒸着法、吐出
法等により有機ＥＬ材をコートし、発光層とする。2. Description of the Related Art In recent years, liquid crystal displays have become word processors,
It is widely used as a display unit of a personal computer or the like. This liquid crystal display is a non-light-emitting element and has a problem in terms of brightness, particularly when used in a reflective display. Attention has been paid to a light-emitting display using an organic light-emitting material (hereinafter, referred to as an organic EL) having a thin and lightweight characteristic. FIG. 1 shows a cross-sectional view of the light emitting display. In the figure, 1 indicates an aluminum electrode, 2 indicates an organic EL material, 3 indicates an ITO transparent electrode, 4 indicates a glass substrate, and 5 indicates a power supply. The method of making this light emitting display is as follows. First, an ITO transparent electrode is provided on a transparent substrate by a sputtering method, an evaporation method, or the like. Thereafter, an electrode having a desired shape is formed by photolithography. Thereafter, an organic EL material is coated by a spin coating method, a vapor deposition method, a discharge method, or the like to form a light emitting layer.
【０００３】コートの仕方は上記方法が主であるが、最
近はパターニングできる吐出法が注目されている。[0003] The above method is the main method of coating, but recently, an ejection method capable of patterning has attracted attention.
【０００４】このようにして得た発光層の上に仕事関数
の低い金属、例えばマグネシウム、アルミニウム、リチ
ウム、カルシュウム、銀、あるいはこれらの合金を蒸着
法、スパッター法等によりとばすことにより対向電極を
得る。以上が基本の工程であるが、発光効率を上げるた
めに、ＩＴＯ透明電極を付けた後更に、ホール輸送材
料、例えばＮ，Ｎ’−ジフェニル−Ｎ，Ｎ’−（２，４
−ジメチルフェニル）−１、１’−ビフェニル−４，
４’−ジアミンを蒸着法により付けても良い。また有機
ＥＬ材料を付けた後、電子輸送材料を、例えば２−（４
−ビフェニル）−５−（４−ｔｅｒｔ−ブチルフェニ
ル）−１，３，４−オキシジアゾールを付けても良い。A counter electrode is obtained by blowing a metal having a low work function, for example, magnesium, aluminum, lithium, calcium, silver, or an alloy thereof on the light emitting layer thus obtained by vapor deposition, sputtering, or the like. . The above is the basic process, but in order to increase the luminous efficiency, after attaching the ITO transparent electrode, a hole transport material such as N, N′-diphenyl-N, N ′-(2,4
-Dimethylphenyl) -1,1'-biphenyl-4,
4′-diamine may be applied by a vapor deposition method. After attaching the organic EL material, the electron transporting material is changed to, for example, 2- (4
-Biphenyl) -5- (4-tert-butylphenyl) -1,3,4-oxydiazole.
【０００５】この対向する２種の電極に電界を印加する
ことにより発光させることができる。この発光ディスプ
レイの特徴として、１０ボルト以下の低電圧で駆動でき
ることがある。Light can be emitted by applying an electric field to the two opposite electrodes. A feature of this light emitting display is that it can be driven at a low voltage of 10 volts or less.
【０００６】この有望な技術に吐出装置を組み合わせる
ことにより有機ＥＬ材料のパターニングが可能となり、
フルカラーの発光ディスプレイを得ることが出来る。す
なわち従来のホトリソグラフィー法による赤、緑、青の
パターニングの代わりに、ディスペンサー、インクジェ
ットプリンティング装置等の吐出装置を用い、赤、緑、
青の有機ＥＬ材料を溶かした溶液を、適当なＩＴＯ透明
電極上に吐出し、溶媒を気散させパターニングした後、
対向電極を蒸着（スパッター）する事により、フルカラ
ーの発光ディスプレイを得ることが出来る。この吐出法
による概念を図２を用い説明する。図において１１はガ
ラス基板を、１２はＴＦＴ素子を、１３はＩＴＯ電極
を、１４は溶液を吐出するノズルを示す。図に示すノズ
ルにより、赤、緑、青に対応した有機ＥＬ材料をＩＴＯ
電極上に、例えば、図に示すＴＦＴ素子により個々別々
に駆動できるように形成されたＩＴＯ電極上に、交互に
赤、緑、青の有機ＥＬ材料が並置するように、吐出する
事によりフルカラーディスプレイを作成できる。By combining this promising technology with an ejection device, it becomes possible to pattern the organic EL material,
A full-color light-emitting display can be obtained. That is, instead of the patterning of red, green, and blue by the conventional photolithography method, a discharging device such as a dispenser or an ink jet printing device is used, and red, green,
A solution in which a blue organic EL material is dissolved is discharged onto an appropriate ITO transparent electrode, and after the solvent is diffused and patterned,
By depositing (sputtering) the counter electrode, a full-color light-emitting display can be obtained. The concept of this discharge method will be described with reference to FIG. In the figure, 11 indicates a glass substrate, 12 indicates a TFT element, 13 indicates an ITO electrode, and 14 indicates a nozzle for discharging a solution. Using the nozzles shown in the figure, organic EL materials corresponding to red, green and blue
Full-color display by discharging red, green, and blue organic EL materials alternately side by side on ITO electrodes formed on the electrodes, for example, individually so as to be driven individually by the TFT elements shown in the figure. Can be created.
【０００７】吐出装置を組み合わせてパターニングする
方法の欠点として、極細のノズルから溶液を吐出するた
め、溶液の乾燥により、溶質が析出しノズルが詰まる欠
点がある。この欠点を克服するために、グリセリンやジ
エチレングリコール、ジアミン、糖、あるいはこれら溶
媒の誘導体等の高沸点の親水性溶媒を加えるている。As a drawback of the patterning method using a combination of discharge devices, since the solution is discharged from an extremely fine nozzle, the solution is dried, solutes are deposited, and the nozzle is clogged. To overcome this drawback, a high-boiling hydrophilic solvent such as glycerin, diethylene glycol, diamine, sugar, or a derivative of these solvents is added.
【０００８】この発光ディスプレイに用いられる有機Ｅ
Ｌ材料としては低分子系有機ＥＬ材料、高分子系有機Ｅ
Ｌ材料がある。高分子系材料としてはポリパラフェニレ
ンビニレン系（以後ＰＰＶと略記する）の材料がその材
料の安定性、発光効率、輝度等の点で優れており、注目
されている。この材料は前駆体を用いることを特徴とし
ており、溶液状態で原料を扱えることができ、スピンコ
ート法、ディッピング法等により薄膜化出来る特徴があ
る。そして得られた膜を焼成することにより一重結合が
二重結合となり溶媒に不溶となり、安定な膜となる。こ
のときの二重結合のでき具合により、発光効率、輝度に
差がでる。[0008] The organic E used for this light emitting display
As the L material, a low molecular organic EL material, a high molecular organic E
There is L material. As a polymer material, a polyparaphenylene vinylene (hereinafter abbreviated as PPV) material has been attracting attention because of its excellent stability, luminous efficiency, luminance and the like. This material is characterized in that a precursor is used, the raw material can be handled in a solution state, and a thin film can be formed by a spin coating method, a dipping method, or the like. By firing the obtained film, the single bond becomes a double bond, becomes insoluble in the solvent, and becomes a stable film. The luminous efficiency and luminance differ depending on the degree of the double bond at this time.
【０００９】このＰＰＶ系材料を溶かした溶液を用い、
吐出装置でパターニングしようとすると、一般的な水、
メタノール等の低沸点溶媒では乾燥しやすく、ノズルの
目詰まりを起こしやすい。このためグリセリンやエチレ
ングリコール等の親水性高沸点溶媒を添加していた。こ
れがＰＰＶ系材料を用い、吐出装置によりパターニング
する場合の従来の例である。従来例の通りグリセリン等
を入れたＰＰＶ系材料を溶かした溶液を吐出装置により
吐出し、焼成するとグリセリン等の高沸点溶媒がなかな
か抜けなく、一重結合が二重結合になりがたく、共役化
しない現象が見られ、得られた発光材料は目的とする波
長の光より短波長にシフトするか、ほとんど発光しない
等の欠点があった。Using a solution in which the PPV material is dissolved,
When trying to pattern with the ejection device, general water,
Low boiling solvents such as methanol tend to dry and clog the nozzles. Therefore, a hydrophilic high-boiling solvent such as glycerin or ethylene glycol has been added. This is a conventional example in which a PPV-based material is used and patterning is performed by an ejection device. As in the conventional example, a solution in which a PPV-based material containing glycerin or the like is dissolved is discharged by a discharge device, and when baked, a high-boiling solvent such as glycerin does not easily come off, and a single bond is unlikely to become a double bond and is not conjugated. A phenomenon was observed, and the obtained luminescent material had disadvantages such as shifting to a shorter wavelength than the light of the target wavelength or emitting little light.
【００１０】[0010]
【発明が解決しようとする課題】本発明は、吐出装置に
よるＰＰＶ材料を用いた有機ＥＬ発光ディスプレイの製
造において、発光波長が低波長側にシフトし、ほとんど
光らなくなるという問題を解決するためになされたもの
で、その目的は従来の製造方法をあまり変えることな
く、ＰＰＶ系の有機ＥＬ材料を吐出装置を用い吐出し、
パターニングすることによりフルカラー発光ディスプレ
イを作成する製造方法を提供するためになされたもので
ある。SUMMARY OF THE INVENTION The present invention has been made to solve the problem that the emission wavelength shifts to a lower wavelength side and hardly emits light in the manufacture of an organic EL light emitting display using a PPV material by a discharge device. The purpose is to discharge a PPV-based organic EL material using a discharge device without changing the conventional manufacturing method so much.
The purpose of the present invention is to provide a method of manufacturing a full-color light-emitting display by patterning.
【００１１】[0011]
【課題を解決するための手段】上記課題を解決するため
に、請求項１の本発明の発光ディスプレイの製造方法
は、吐出装置によりポリフェニレンビニレンの前駆体材
料と高沸点溶媒を含む溶液を基板上に吐出した後、該基
板を焼成する前に、室温での溶媒除去の工程、および乾
燥する工程を入れることを特徴とする。乾燥温度は１２
０度Ｃ以下が好適であり、この温度以下でポリパラフェ
ニレンビニレン前駆体を処理すると二重結合を形成させ
ることなく溶媒を除去できることがわかった。この温度
以上で行うと反応が進み発光波長が低波長側にシフトし
発光効率が極端に落ちることがわかった。In order to solve the above-mentioned problems, a method for manufacturing a light-emitting display according to the present invention according to claim 1 is characterized in that a solution containing a polyphenylenevinylene precursor material and a high-boiling-point solvent is deposited on a substrate by an ejection device. After firing, before the substrate is fired, a step of removing the solvent at room temperature and a step of drying are provided. Drying temperature is 12
It was found that the temperature was preferably 0 ° C. or lower, and it was found that when the polyparaphenylene vinylene precursor was treated at this temperature or lower, the solvent could be removed without forming a double bond. It was found that when the reaction was carried out at a temperature higher than this, the reaction proceeded and the emission wavelength shifted to the lower wavelength side, and the emission efficiency dropped extremely.
【００１２】そして請求項２は、この高沸点溶媒がグリ
セリン、ジエチレングリコール、トリエタノールアミ
ン、糖であるか、こらら溶媒の誘導体であるか又はこれ
ら溶媒の混合物であることを特徴としている。これら溶
媒を加えることにより吐出装置のノズル中を常に湿潤に
しておけるためノズルの目詰まりを起こすことなく長時
間の使用に耐える。[0012] Claim 2 is characterized in that the high boiling point solvent is glycerin, diethylene glycol, triethanolamine, sugar, a derivative of these solvents, or a mixture of these solvents. By adding these solvents, the inside of the nozzle of the discharge device can be kept moist at all times, so that the nozzle can be used for a long time without clogging.
【００１３】請求項３は溶媒の除去を室温、真空下で行
うことを特徴としている。室温、真空下で行うため、Ｐ
ＰＶの前駆体の反応を起こさせることなく、高沸点溶媒
を除去でき、発光波長のシフトがなく発光効率の良い発
光ディスプレイを製造できる。A third aspect of the present invention is characterized in that the solvent is removed at room temperature under vacuum. Because it is performed at room temperature under vacuum, P
A high-boiling-point solvent can be removed without causing a reaction of a PV precursor, and a light-emitting display with high emission efficiency without a shift in emission wavelength can be manufactured.
【００１４】請求項４は真空度を制限したもので、１ｍ
ｍＨｇ以下の真空下で処理することにより、ほとんどの
高沸点溶媒を高沸点溶媒の沸点以下の温度で処理できる
ようになり更に好適である。[0014] Claim 4 restricts the degree of vacuum, and
By treating under a vacuum of mHg or less, most of the high-boiling solvents can be treated at a temperature equal to or lower than the boiling point of the high-boiling solvent, which is more preferable.
【００１５】請求項５は溶媒除去後、痕跡の高沸点溶媒
を除去するための工程であり、この工程をいれることに
より、表示体の寿命や発光強度を更に増加させることが
できる。温度はあまり高いと、ＰＰＶの反応が進み良く
なく、温度が低いと除去に時間がかかり良くない、１２
０度Ｃ以下であれば可能であるが、７０度Ｃ以下であれ
ば尚よい。A fifth aspect of the present invention is a step for removing traces of the high-boiling-point solvent after removing the solvent. By including this step, the life of the display and the luminous intensity can be further increased. If the temperature is too high, the reaction of PPV does not proceed well, and if the temperature is low, it takes a long time to remove it.
Although it is possible if the temperature is 0 ° C. or less, it is more preferable if the temperature is 70 ° C. or less.
【００１６】請求項６は吐出装置がインクジェットプリ
ンティング装置であることを特徴としている。吐出装置
としてはディスペンサー、インクジェットプリンティン
グ装置等あるが、微細化、高速化の点でインクジェット
プリンティング装置が好適である。According to a sixth aspect of the present invention, the discharge device is an ink jet printing device. As a discharge device, there are a dispenser, an ink jet printing device, and the like, and an ink jet printing device is preferable in terms of miniaturization and high speed.
【００１７】[0017]
【発明の実施の形態】（実施例１）ポリパラフェニレン
ビニレンの前駆体である高分子電解質を０．５重量パー
セント含む下記溶液を吐出装置にとり、ＩＴＯ透明電極
の付いた基板上に吐出した。(Example 1) The following solution containing 0.5% by weight of a polymer electrolyte which is a precursor of polyparaphenylenevinylene was taken in a discharge device and discharged onto a substrate having an ITO transparent electrode.
【００１８】溶液 水・・・・・・・・・・９０重量パーセント グリセリン・・・・・・１０重量パーセント 吐出後該基板を１ｍｍＨｇの真空下で１００度Ｃで１時
間乾燥した。乾燥後、１ｍｍＨｇの真空下、１７０度Ｃ
に昇温し、１７０度Ｃで４時間焼成した。しかる後、蒸
着機によりアルミニウム金属を２０００オングストロー
ム蒸着した。えられたパネルの蛍光スペクトルを調べた
ところ、蛍光スペクトルの最大発光波長は５３５ｎｍで
あった。またこの発光ディスプレイを駆動したところ６
ボルトで駆動できた、発光スペクトルはほぼ蛍光スペク
トルと一致した。Solution Water 90% by weight Glycerin 10% by weight After discharging, the substrate was dried at 100 ° C. for 1 hour under a vacuum of 1 mmHg. After drying, under vacuum of 1 mmHg, 170 ° C
And baked at 170 ° C. for 4 hours. Thereafter, aluminum metal was vapor-deposited at 2,000 Å by a vapor deposition machine. When the fluorescence spectrum of the obtained panel was examined, the maximum emission wavelength of the fluorescence spectrum was 535 nm. When this light emitting display was driven, 6
The emission spectrum, driven by volts, almost coincided with the fluorescence spectrum.
【００１９】（比較例）実施例１と同様の方法により、
吐出装置によりＩＴＯ透明電付き極基板にポリパラフェ
ニレンビニレンの前駆体溶液を吐出した後、直接１ｍｍ
Ｈｇの真空下、１７０度Ｃで焼成した、このパネルの蛍
光スペクトルの最大発光波長は４８５ｎｍであり、発光
強度は実施例１にくらべ一桁ほど悪かった。また２０ボ
ルトで駆動しても発光は観測されなかった。 （実施例２）実施例１の前駆体溶液にポリパラフェニレ
ンビニレンの前駆体内容物に対して、１，１，４，４−
テトラフェニルブタジエン、ローダミンＢを２重量パー
セント添加した溶液を作った。この溶液と無添加の溶液
をあわせて３原色の有機ＥＬ材料としインクジェットプ
リンティング装置のインクタンクに充填し、図２に示す
ように、ＴＦＴ基板上に並置したＩＴＯ電極上に赤、
緑、青とモザイク上に打ち分けた。この後１ｍｍＨｇの
真空下で１００度ｃで１時間乾燥した。乾燥後、他の乾
燥機において窒素雰囲気下、大気圧中で４時間焼成し
た。(Comparative Example) In the same manner as in Example 1,
After discharging the precursor solution of polyparaphenylenevinylene onto the electrode substrate with ITO transparent electrode by the discharging device, it is directly 1mm
The panel was fired at 170 ° C. under a vacuum of Hg. The maximum emission wavelength of the fluorescence spectrum of this panel was 485 nm, and the emission intensity was about one digit worse than that of Example 1. No light emission was observed even when driven at 20 volts. (Example 2) In the precursor solution of Example 1, 1,1,4,4-
A solution was prepared by adding 2% by weight of tetraphenylbutadiene and rhodamine B. The solution and the additive-free solution were combined to form an organic EL material of three primary colors, which was filled in an ink tank of an ink jet printing apparatus. As shown in FIG.
Green, blue and mosaic were separated. Thereafter, it was dried at 100 ° C. for 1 hour under a vacuum of 1 mmHg. After drying, it was calcined in another dryer under a nitrogen atmosphere at atmospheric pressure for 4 hours.
【００２０】焼成後、リチウム含有アルミニウムを２０
００オングストロームスパッタをし、対向電極とした。After firing, the lithium-containing aluminum is
00 Å was sputtered to form a counter electrode.
【００２１】（実施例３）ポリパラフェニレンビニレン
の前駆体である高分子電解質を０．５重量パーセント含
む下記溶液を吐出装置にとり、ＩＴＯ透明電極の付いた
基板上に吐出した。Example 3 The following solution containing 0.5% by weight of a polymer electrolyte which is a precursor of polyparaphenylenevinylene was taken in a discharging apparatus and discharged onto a substrate having an ITO transparent electrode.
【００２２】溶液 水・・・・・・・・・・９０重量パーセント グリセリン・・・・・・１０重量パーセント 吐出後該基板を０．０１ｍｍＨｇの真空下、室温で４時
間溶媒除去した。溶媒除去後、そのまま、４０度Ｃに温
度を上げで３０分間、乾燥した。乾燥後、窒素雰囲気
下、１７０度Ｃで４時間焼成した。しかる後、蒸着機に
よりアルミニウム金属を２０００オングストローム蒸着
した。えられたパネルの蛍光スペクトルを調べたとこ
ろ、蛍光スペクトルの最大発光波長は５３５ｎｍであっ
た。またこの発光ディスプレイを駆動したところ６ボル
トで駆動できた、発光スペクトルはほぼ蛍光スペクトル
と一致した。Solution Water: 90% by weight Glycerin: 10% by weight After discharge, the substrate was subjected to solvent removal at room temperature for 4 hours under a vacuum of 0.01 mmHg. After removing the solvent, the temperature was raised to 40 ° C. and dried for 30 minutes. After drying, baking was performed at 170 ° C. for 4 hours in a nitrogen atmosphere. Thereafter, aluminum metal was vapor-deposited at 2,000 Å by a vapor deposition machine. When the fluorescence spectrum of the obtained panel was examined, the maximum emission wavelength of the fluorescence spectrum was 535 nm. When this light-emitting display was driven, it could be driven at 6 volts. The emission spectrum almost coincided with the fluorescence spectrum.
【００２３】（実施例４）実施例１の前駆体溶液にポリ
パラフェニレンビニレンの前駆体内容物に対して、１，
１，４，４−テトラフェニルブタジエン、ローダミンＢ
をそれぞれ２重量パーセント添加した溶液を作った。こ
の溶液と無添加の溶液をあわせて３原色の有機ＥＬ材料
としインクジェットプリンティング装置のインクタンク
に充填し、図２に示すように、ＴＦＴ基板上に並置した
ＩＴＯ電極上に赤、緑、青とモザイク上に打ち分けた。
この後、０．０１ｍｍＨｇの真空下、室温で４時間溶媒
を除去した。除去後、０．０１ｍｍＨｇの真空下、４０
度Ｃで３０分間乾燥した。乾燥後、窒素雰囲気下、大気
圧中で４時間焼成した。Example 4 The precursor solution of Example 1 was mixed with the polyparaphenylene vinylene precursor content by adding 1,
1,4,4-tetraphenylbutadiene, rhodamine B
Were added at 2% by weight, respectively. The solution and the additive-free solution were combined into an organic EL material of three primary colors and filled in an ink tank of an ink jet printing apparatus. As shown in FIG. 2, red, green, and blue were formed on ITO electrodes juxtaposed on a TFT substrate. I shot over the mosaic.
Thereafter, the solvent was removed at room temperature under a vacuum of 0.01 mmHg for 4 hours. After removal, under vacuum of 0.01 mmHg, 40
It was dried at a temperature C for 30 minutes. After drying, it was calcined in a nitrogen atmosphere at atmospheric pressure for 4 hours.
【００２４】焼成後、アルミニウムを２０００オングス
トロームスパッタをし、対向電極とした。After firing, aluminum was sputtered at 2,000 Å to form a counter electrode.
【００２５】[0025]
【発明の効果】以上、詳細な説明で明示したように、本
発明によれば簡単な工程を従来の工程に加えることによ
り、従来の方法により作成された発光ディスプレイの発
光スペクトルのピークが作成方法により適当に移動した
り、発光強度が小さかったのに対し、発光強度を大きく
でき、スペクトルの移動も少なくできる。またこの方法
によりフルカラー発光ディスプレイが簡単に、安く提供
出来る。As described above, according to the present invention, by adding a simple process to the conventional process, the peak of the emission spectrum of the light-emitting display produced by the conventional method can be obtained. , The emission intensity can be increased and the shift of the spectrum can be reduced, while the emission intensity is small. Further, a full-color light-emitting display can be easily and inexpensively provided by this method.
【図１】有機ＥＬを用いた発光ディスプレイの断面図。FIG. 1 is a cross-sectional view of a light-emitting display using an organic EL.
【図２】ＴＦＴ基板上に有機ＥＬ材料を吐出する場合の
概念図。FIG. 2 is a conceptual diagram when an organic EL material is discharged onto a TFT substrate.
１・・・アルミニウム電極 ２・・・有機ＥＬ材料 ３・・・ＩＴＯ透明電極 ４・・・ガラス基板 ５・・・電源 １１・・ガラス基板 １２・・ＴＦＴ素子 １３・・ＩＴＯ電極 １４・・ノズル DESCRIPTION OF SYMBOLS 1 ... Aluminum electrode 2 ... Organic EL material 3 ... ITO transparent electrode 4 ... Glass substrate 5 ... Power supply 11 ... Glass substrate 12 ... TFT element 13 ... ITO electrode 14 ... Nozzle
Claims (6)
該発光材料を挟む電極材料よりなる発光ディスプレイの
製造方法において、少なくともポリパラフェニレンビニ
レンの前駆体を溶かした溶液と親水性の高沸点溶媒より
なる溶液を、一方の透明電極を有する基板上に、吐出装
置を用い吐出した後、室温で溶媒を除去した後、該基板
を１２０度Ｃ以下で乾燥し、しかる後昇温、焼成し、発
光層とした後、対向電極を形成する事を特徴とする発光
ディスプレイの製造方法。1. A method for manufacturing a light-emitting display comprising a polyparaphenylenevinylene-based light-emitting material and an electrode material sandwiching the light-emitting material, comprising a solution in which at least a precursor of polyparaphenylenevinylene is dissolved and a hydrophilic high-boiling solvent. The solution was discharged onto a substrate having one of the transparent electrodes using a discharge device, the solvent was removed at room temperature, the substrate was dried at 120 ° C. or lower, and then the temperature was increased and baked to form a light emitting layer. And then forming a counter electrode.
コール、グリセリン、エタノールアミン、糖であるか、
あるいはこれらの誘導体、又はこれら溶媒の混合物であ
ることを特徴とする発光ディスプレイの製造方法。2. The method according to claim 1, wherein the high-boiling solvent is ethylene glycol, glycerin, ethanolamine, or sugar.
Alternatively, a method for producing a light-emitting display, which is a derivative of these or a mixture of these solvents.
真空下で溶媒を除去した後、真空下で、加熱乾燥し、し
かる後、昇温、焼成する事を特徴とする発光ディスプレ
イの製造方法。3. The method according to claim 1, wherein
A method for producing a light-emitting display, comprising removing a solvent under vacuum, drying by heating under vacuum, and then heating and baking.
Ｈｇ以下の真空で溶媒の除去をする事を特徴とする発光
ディスプレイの製造方法。4. The method according to claim 3, wherein 1 mm
A method for manufacturing a light-emitting display, comprising removing a solvent in a vacuum of Hg or less.
媒の除去後、７０度Ｃ以下の温度、１ｍｍＨｇ以下の真
空下で加熱乾燥をする事を特徴とする発光ディスプレイ
の製造方法。5. The method for producing a light emitting display according to claim 3, wherein after the solvent is removed, heating and drying are performed at a temperature of 70 ° C. or less and a vacuum of 1 mmHg or less.
ンティング装置であることを特徴とする発光ディスプレ
イの製造方法。6. A method for manufacturing a light emitting display according to claim 1, wherein said discharge device is an ink jet printing device.
Priority Applications (1)
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|---|---|---|---|
| JP14490198A JP3812144B2 (en) | 1998-05-26 | 1998-05-26 | Manufacturing method of light emitting display |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14490198A JP3812144B2 (en) | 1998-05-26 | 1998-05-26 | Manufacturing method of light emitting display |
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| Publication Number | Publication Date |
|---|---|
| JPH11339957A true JPH11339957A (en) | 1999-12-10 |
| JP3812144B2 JP3812144B2 (en) | 2006-08-23 |
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|---|---|---|---|
| JP14490198A Expired - Lifetime JP3812144B2 (en) | 1998-05-26 | 1998-05-26 | Manufacturing method of light emitting display |
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