KR100471523B1 - Multi color organic EL device, its recipe and display using it - Google Patents

Abstract

A light emitting layer containing at least two or more organic dyes as the light emitting center, wherein at least one of the organic dyes is modified to change the color of light emitted from the device. A multicolor organic EL device, a manufacturing method thereof, and a display using the same.

Description

Multicolor organic EL element, its manufacturing method and display using it

The present invention relates to an organic EL element used for a planar light source and a display element, its manufacturing method and a display using the same.

The organic EL device in which the light emitting layer is composed of an organic thin film is attracting attention as a realization of a large area display device of low voltage driving. A device structure in which an organic layer having different carrier transport properties is laminated is effective for high efficiency of the device, and a device using a low molecular aromatic amine as a hole transporting layer and an aluminum chelate complex as an electron transporting light emitting layer has been reported [CW Tang, Appl. . Phys. Lett., 51, p. 913 (1987)]. In this device, high luminance sufficient for practical use of 1000 cd / m ² at an applied voltage of 10 V or less is obtained.

At present, any color from the blue to the red in the visible region is obtained by using any organic dye as the emission center. Furthermore, RGB multicolor displays (display elements) are possible by arranging pixels with three primary colors of light, red (R), green (G), and blue (B), in parallel on the same substrate. Become.

However, as described above, when a multicolor display having a different emission color, in particular an RGB multicolor display, is constructed using vacuum deposition, pixels having different emission colors need to be sequentially created using a shadow mask on the same substrate. Compared with the above, it requires a lot of effort and a long time in construction, and thus there is a limitation in the size of each pixel, which makes it impossible to construct a highly precise and fine display.

In order to solve these problems, Sung-Sung et al. Proposed that by combining a white light-emitting device and a color filter, the light-emitting element portion can be multi-colored by forming a cylindrical body without finely arranging EL devices or devices with different emission colors. Seong-Seok-Dae, Hyeon-Seori, Korea, Vol. 63, p. 1026-1029 (1994)]. In other words, by inserting a color filter between the transparent substrate and a transparent electrode such as indium-tin oxide (ITO), the color filter controls light emission generated from the organic light emitting layer inserted between the ITO and the back electrode.

In addition, the group of Japan's KKK has proposed a method of arranging RGB pixels by converting from blue to green and red by combining a blue light emitting element and a color conversion layer (Japanese Electronic, January, 102). Page, 1996). In this method, a fluorescent color conversion is inserted between the transparent substrate and the ITO to convert blue light emitted in the light emitting layer into green light or red light.

However, the construction of the multicolorization by the color filter method or the blue color conversion method is simple, but there is a drawback that the efficiency is reduced by the light loss by the color filter or the conversion loss for the presence of the color conversion layer.

FIG. 1: shows the manufacturing process of this invention multicolor organic electroluminescent element of Example 1 by (1)-(6).

2 shows the emission spectra of the devices obtained in Examples (1) and (2).

3 is a graph showing the luminance-voltage characteristics of the device obtained in Example 1 (1).

4 is a graph showing luminance-voltage characteristics of the device obtained in Example (2).

5 is a sectional view of an organic EL device of Example 2. FIG.

6 is a sectional view of an organic EL device of Example 3. FIG.

7 is a sectional view of an organic EL device of Example 4. FIG.

FIG. 8 is a sectional view of each step of A to F, showing the manufacturing process of the organic EL device of Example 4. FIG.

Fig. 9 is a schematic diagram of an organic EL element in which the organic EL element of Example 4 is seen from the glass substrate side.

Preferred Embodiments for Carrying Out the Invention

It is a schematic diagram which shows one Embodiment (Example 4) of the organic electroluminescent element by this invention. On the glass substrate (transparent substrate) 21, a transparent electrode constituting an anode electrode, for example, an ITO electrode 22, a light emitting layer 23 containing three or more kinds of light emitting colors, and a back electrode 24 serving as a cathode are placed on the glass substrate (transparent substrate) 21. It is laminated. The laminated structure of the specific element is not particularly limited, and in addition, the anode / hole transport layer / light emitting layer / cathode, the anode / light emitting layer / electron transport layer / cathode, the anode / hole transport layer / light emitting layer / electron transport layer / cathode, anode / A hole injection layer / light emitting layer / cathode, an anode / hole injection layer / hole transporting layer / light emitting layer / cathode, an anode / hole injection layer / hole transporting layer / light emitting layer / electron transporting layer / cathode and the like.

It is a schematic diagram which shows the construction method of a multicolor organic electroluminescent element.

Electromagnetic radiation irradiation (exposure) of one or more light-emitting layers containing organic dyes which may serve as light emission centers can be performed on any one or all layers. In this case, (a) When the irradiation intensity is changed over the entire surface (for example, it is exposed through a filter having a different transmittance partially, such as a black and white negative film, or scanning while changing the irradiation intensity of light generated from a small light source). Or (b) partial investigation by masking. In the case of partial exposure, for example, close exposure using a photomask, or partial exposure using projection exposure (light condensed by a lens or light generated from a small light source, or using a photomask together) By).

In the organic EL element, holes are injected into the organic layer from the anode, that is, the hole injection electrode, and electrons are injected into the organic layer from the cathode, that is, the electron injection electrode. In the organic layer serving as the light emitting layer, both carriers recombine to produce excitons, that is, excited molecules. In the light emitting layer, a small amount of organic dye having an excitation energy level lower than that of the compound (host) used as the light emitting layer is used as a dopant (guest), so that light emission from the host can be modulated from the dopant dye by excitation energy transfer. In this case, when plural kinds of dopant dyes are used, the emission color from the device can be controlled by adjusting the dopant dye concentrations (J. Kido et al., Appl. Phys. Lett. 67 2281, 1995). .

In the present invention, a device having two or more organic dyes capable of functioning as plural kinds of light-emitting centers is partially exposed by irradiating electromagnetic waves such as ultraviolet light or visible light to any organic dye, thereby degrading only arbitrary organic dyes. To modulate the color of negative emission. In particular, red, green, and blue pigments are contained in all the pixels on the same substrate, and the red, green, and blue light emission colors are formed by electromagnetic waves, which can be used as a full color display.

In the present invention, the host compound dispersing the dopant dye which can be used as an organic EL device which is not full color but exhibits a color emission state of the same color as two or several colors is not limited to the emission color. Carrier transporting properties and electron transporting properties are not limited. It may also be hole transporting or double carrier aqueous, with no particular limitation.

For example, the most common ones are anthracene, naphthalene, phenanthrene, pyrene, tetracene, coronene, chrysene, fluorocene, perylene, phthaloperylene, naphthaloperylene, perinone, phthaloperinone, naphthalo Perinone, diphenylbutadiene, tetraphenylbutadiene, coumarin, oxadiazole, aldazine, bisbenzoxazolin, bisstyryl, pyrazine, cyclopentadiene, auxin, aminoquinoline, imine, diphenylethylene, vinylanthracene, diadia Minocarbazole, pyran, thiopyran, polymethine, merocyanine, imidazole chelated oxynoid compound, quinacridone, rubrene and the like and derivatives thereof.

As fluorescent brighteners, such as a benzoxazole type, a benzothiazole type, and a benzimidazole type, what is disclosed by Unexamined-Japanese-Patent No. 59-194393 is mentioned, for example. Representative examples thereof include 2,5-bis (5,7-di-t-pentyl-2-benzoxazolyl) -1,3,4-thiazole and 4,4'-bis (5,7-di-t- Pentyl-2-benzoxazolyl) stilbene, 4,4'-bis [5,7-di- (2-methyl-2-butyl) -2-benzoxazolyl] stilbene, 2,5-bis (5 , 7-di-t-pentyl-2-benzoxazolyl) thiophene, 2,5-bis [5- (α, α-dimethylbenzyl) -2-benzoxazolyl] thiophene, 2,5-bis [ 5,7-di- (2-methyl-2-butyl) -2-benzoxazolyl] -3,4-diphenylthiophene, 2,5-bis (5-methyl-2-benzoxazolyl) thiophene , 4,4'-bis (2-benzoxazolyl) biphenyl, 5-methyl-2- {2- [4- (5-methyl-2-benzoxazolyl) phenyl] vinyl} benzoxazole, 2- Benzothiazol type, such as [2- (4-chlorophenyl) vinyl] naphtho (1, 2-d) oxazole, Benzothiazine, such as 2,2 '-(p-phenylenedivinylene) -bisbenzothiazole Benzimidazoles, such as a sol type, 2- {2- (4- (2-benzimidazolyl) phenyl] vinyl} benzimidazole, and 2- [2- (4-carboxyphenyl) vinyl] benzimidazole, etc. Fluorescent brighteners can also be used.

As the metal chelated oxanoid compound, for example, those disclosed in Japanese Patent Laid-Open No. 63-295695 can be used. Representative examples thereof include tris (8-quinolinol) aluminum, bis (8-quinolinol) magnesium, bis [benzo (f) -8-quinolinol] zinc and bis (2-methyl-8-quinolinolate Aluminum oxide, tris (8-quinolinol) indium, tris (5-methyl-8-quinolinol) aluminum, 8-quinolinol lithium, tris (5-chloro-8-quinolinol) gallium, bis To 8-hydroxyquinoline-based metal complexes and dilithium such as (5-chloro-8-quinolinol) calcium and poly [zinc (II) -bis- (8-hydroxy-5-quinolinol) methane] Pindridion etc. are mentioned.

As the distyrylbenzene-based compound, for example, those disclosed in the specification of European Patent No. 0373582 can be used. Representative examples thereof include 1,4-bis (2-methylstyryl) benzene, 1,4-bis (3-methylstyryl) benzene, 1,4-bis (4-methylstyryl) benzene, distyrylbenzene, 1 , 4-bis (2-ethylstyryl) benzene, 1,4-bis (3-ethylstyryl) benzene, 1,4-bis (2-methylstyryl) -2-methylbenzene, 1,4-bis (2-methylstyryl) ethylbenzene etc. are mentioned.

In addition, the distyrylpyrazine derivative disclosed in Japanese Patent Laid-Open No. 2-252793 can also be used as an organic pigment. Typical examples thereof include 2,5-bis (4-methylstyryl) pyrazine, 2,5-bis (4-ethylstyryl) pyrazine, 2,5-bis [2- (1-naphryl) vinyl] pyrazine, 2 , 5-bis (4-methoxystyryl) pyrazine, 2,5-bis [2- (4-biphenyl) vinyl] pyrazine, 2,5-bis [2- (1-pyrenyl) vinyl] pyrazine, Etc. can be mentioned.

In addition, the dimethylidene derivative disclosed in European Patent No. 388768 and Japanese Patent Laid-Open No. 3-231970 may be used as a material for the organic light emitting layer. Representative examples thereof include 1,4-phenylenedimethylidine, 4,4'-phenylenedimethylidine, 2,5-xylylenedimethylidine, 2,6-naphthylenedimethylidine, and 1,4-biphenylenedimethylidine. , 1,4-p-terphenylenedimethylridine, 9,10-anthracenediyldimethylridine, 4,4 '-(2,2-di-t-butylphenylvinyl) biphenyl, 4,4'-(2 And 2-diphenylvinyl) biphenyl and the like and derivatives thereof.

It is disclosed in the ciranamine derivatives disclosed in Japanese Patent Application Laid-Open No. Hei 6-49079, Japanese Patent Application Laid-Open No. 6-293778, Japanese Patent Application Laid-Open No. 6-279322, and Japanese Patent Application Laid-Open No. 6-279323. Functional styryl compounds, oxadiazole derivatives disclosed in Japanese Patent Laid-Open Nos. 6-107648 and 6-92947, Anthracene compounds disclosed in Japanese Patent Laid-Open No. 6-206865, and Japanese Patent Laid-Open No. 6 Oxynate derivatives disclosed in -145146, tetraphenylbutadiene compounds disclosed in Japanese Patent Application Laid-open No. Hei 4-96990, organic trifunctional compounds disclosed in Japanese Patent Application Laid-open No. Hei 3-296595, and furthermore, in Patent Publication. Coumarin derivatives disclosed in Japanese Patent Application Laid-Open No. 2-191694, perylene derivatives disclosed in Japanese Patent Application Laid-Open No. 2-196885, naphthalene derivatives disclosed in Japanese Patent Application Laid-Open No. 2-255789, and Japanese Patent Application Laid-Open No. 2-28967 Phthalopelinone derivatives disclosed in Japanese Patent Application Laid-Open No. 6 and Japanese Patent Laid-Open No. 2-88689, and styrylamine derivatives disclosed in Japanese Patent Application Laid-Open No. 2-250292.

When it is intended to be used as an R (red), G (green), or B (blue) multicolor display, for example, a full color display, it is necessary to emit three primary colors of red, green, and blue. Therefore, the organic compound serving as the host material requires a light emission color (near ultraviolet light in terms of color) having a blue or higher energy level, which corresponds to a peak wavelength of the emission spectrum of 370 to 500 nm.

It is necessary to be such an organic compound for full color display, that is, an organic compound having cyan emission from near ultraviolet and also having carrier transport properties. In this case, the organic compound may be electron transporting, hole transporting or bicarrier transporting. Below, the organic compound for hosts which satisfy these requirements is illustrated.

polycyclic compounds such as p-terphenyl and quaterphenyl and derivatives thereof, condensed polycyclic hydrocarbons such as naphthalene, tetracene, pyrene, coronene, chrysene, anthracene, diphenylanthracene, naphthacene and phenanthrene Compounds and derivatives thereof, condensed heterocyclic compounds such as phenanthroline, vasophenanthroline, phenanthridine, acridine, quinoline, quinoxaline, phenazine, derivatives thereof, and perylenes, phthaloperylenes, naphs Taloperylene, perinone, phthaloperinone, naphthaloperinone, diphenylbutadiene, tetraphenylbutadiene, oxadiazole, triazole, aldazine, bisbenzoxazoline, bisstyryl, pyrazine, cyclopentadiene, And vinyl derivatives, carbazole and the like, derivatives thereof, 8-quinolinolate or metal derivatives having at least one of them as ligands.

Japanese Patent Application Laid-Open Nos. 5-202011, 7-179394, 7-278124, 7-228579, and the oxadiazoles disclosed in Japanese Patent Laid-Open No. 7-228579. Triazines disclosed in -157473, Stilbene derivatives and distyrylarylene derivatives disclosed in JP-A-6-203963, JP-A-6-132080 and JP-A-6-88072 The styryl derivatives disclosed in Japanese Patent Application Laid-Open No. 6-100857 and the diolefin derivatives disclosed in Japanese Patent Application Laid-open No. Hei 6-207170 can be used. As the distyrylbenzene-based compound, for example, those disclosed in the specification of European Patent No. 0373582 can be used. Representative examples thereof include 1,4-bis (2-methylstyryl) benzene, 1,4-bis (3-methylstyryl) benzene, 1,4-bis (4-methylstyryl) benzene, ditylbenzene, 1 , 4-bis (2-ethylstyryl) benzene, 1,4-bis (3-ethylstyryl) benzene, 1,4-bis (2-methylstyryl) -2-methylbenzene, 1,4-bis (2-methylstyryl) -2-ethylbenzene etc. can also be used.

The distyrylpyrazine derivative disclosed in Japanese Patent Laid-Open No. 2-252793 can also be used as a light emitting layer host material. Representative examples include 2,5-bis (4-methylstyryl) pyrazine, 2,5-bis (4-ethylstyryl) pyrazine, 2,5-bis [2- (1-naphthyl) vinyl] pyrazine, 2 , 5-bis (4-methoxystyryl) pyrazine, 2,5-bis [2- (4-biphenyl) vinyl] pyrazine, 2,5-bis [2- (1-pyrenyl) vinyl] pyrazine and the like Can be used.

Furthermore, fluorescent whitening agents such as benzoxazole series, benzothiazole series and benzimidazole series can be used, for example, those disclosed in Japanese Patent Laid-Open No. 59-194393. Representative examples thereof include 2,5-bis (5,7-di-t-pentyl-2-benzoxazolyl) -1,3,4-thiazole and 4,4'-bis (5,7-di-t- Pentyl-2-benzoxazolyl) stilbene, 4,4'-bis [5,7-di- (2-methyl-2-butyl) -2-benzoxazolyl) stilbene, 2,5-bis (5 , 7-di-t-pentyl-2-benzoxazolyl) thiophene, 2,5-bis [5- (α, α-dimethylbenzyl) -2-benzoxazolyl] thiophene, 2,5-bis [ 5,7-di- (2-methyl-2-butyl) -2-benzoxazolyl] -3,4-diphenylthiophene, 2,5-bis (5-methyl-2-benzoxazolyl) thiophene , 4,4'-bis (2-benzoxazolyl) biphenyl, 5-methyl-2- {2- [4- (5-methyl-2-benzoxazolyl) phenyl] vinyl} benzoxazole, 2- Benzothiazol type, such as [2- (4-chlorophenyl) vinyl] naphtho (1, 2-d) oxazole, Benzothiazine, such as 2,2 '-(p-phenylenedivinylene) -bisbenzothiazole Benzimidazoles, such as a sol type, 2- {2- [4- (2-benzimidazolyl) phenyl] vinyl} benzimidazole, and 2- [2- (4-carboxyphenyl) vinyl] benzimidazole, etc. Fluorescent brighteners can also be used.

In addition, the dimethylidine derivative disclosed in European Patent No. 388768 and Japanese Patent Laid-Open No. 3-231970 can also be used as a material for the organic light emitting layer. Representative examples thereof include 1,4-phenylenedimethylidine, 4.4'-phenylenedimethylidine, 2,5-xylylenedimethylidine, 2,6-naphthylenedimethylidine, 1,4-biphenylenedimethylidine, 1 , 4-p-terphenylenedimethylidine, 9,10-anthracenediyldimethylidine, 4,4 '-(2,2-di-t-butylphenylvinyl) biphenyl, 4,4'-(2,2 Diphenylvinyl) biphenyl and the like and derivatives thereof, and the ciranamine derivatives disclosed in Japanese Patent Laid-Open Nos. 6-49079 and 6-293778, and 6-279322. , Polyfunctional styryl compounds disclosed in Japanese Patent Application Laid-Open No. 6-279323, oxadiazole derivatives disclosed in Japanese Patent Application Laid-Open No. 6-107648 or Japanese Patent Application Laid-Open No. 6-92947, Anthracene compounds disclosed in 206865, Oxynate derivatives disclosed in JP-A-6-145146, Tetraphenylbutadi disclosed in JP-A 4-96990 Yen compounds, organic trifunctional compounds disclosed in Japanese Patent Application Laid-Open No. 3-296595, furthermore, coumarin derivatives disclosed in Japanese Patent Application Laid-Open No. 2-191694, and phenanes disclosed in Japanese Patent Application Laid-Open No. 2-196885. Rylene derivatives, naphthalene derivatives disclosed in Japanese Patent Laid-Open No. 2-255789, phthalopelinone derivatives disclosed in Japanese Patent Laid-Open No. H2-289676, and the same Japanese Patent Application Laid-Open No. 2-88689, And styrylamine derivatives disclosed in -250292.

Furthermore, an arylamine compound is mentioned as an organic compound which can be used as a light emitting layer host material. Although it does not specifically limit as these arylamine compounds, Unexamined-Japanese-Patent No. 6-25659, 6-203963, 6-215874, 7-145116, Japanese Patent Application Laid-Open No. 7-224012, Japanese Patent Application Laid-Open No. 7-157473, Japanese Patent Application Laid-Open No. 8-48656, Japanese Patent Application Laid-Open No. 7-126226, Japanese Patent Application Laid-Open No. 7-188130, Patent Publication No. 40995, Patent Publication No. Hei 8-40996, Patent Publication No. Hei 8-40997, Patent Publication No. Hei 7-126225, Patent Publication No. Hei 7-101911, Patent Publication No. Hei 7-97355 Preferred arylamine compounds are, for example, N, N, N ', N'-tetraphenyl-4,4'-diaminophenyl, N, N'-diphenyl-N, N'-di (3- Methylphenyl) -4,4'-diaminophenyl, 2,2-bis (4-di-p-tolylaminophenyl) propane, N, N, N ', N'-tetra-p-tolyl-4,4' -Diaminobiphenyl, bis (4-di-p-tolylaminophenyl) phenylmethane, N, N'-diphenyl-N, N'-di (4-meth Methoxyphenyl) -4,4'-diaminobiphenyl, N, N, N ', N'-tetraphenyl-4,4'-diaminophenyl ether, 4,4'-bis (diphenylamino) couodry Phenyl, 4-N, N-diphenylamino (2-diphenylvinyl) benzene, 3-methoxy-4'-N, N-diphenylaminosteelbenzene, N-phenylcarbazole, 1,1-bis ( 4-di-p-triaminophenyl) -cyclohexane, 1,1-bis (4-di-p-triaminophenyl) -4-phenylcyclohexane, bis (4-dimethylamino-2-methylphenyl) -phenyl Methane, N, N, N-tri (p-tolyl) amine, 4- (di-p-tolylamino) -4 '-[4 (di-p-tolylamino) styryl] stilbene, N, N, N ', N'-tetra-p-tolyl-4,4'-diaminobiphenyl, N, N, N', N'-tetraphenyl-4,4'-diamino-biphenylN-phenylcarbazole , 4,4'-bis [N- (1-naphthyl) -N-phenyl-amino] biphenyl, 4,4 "-bis [N- (1-naphthyl) -N-phenyl-amino] p- Terphenyl, 4,4'-bis [N- (2-naphthyl) -N-phenyl-amino] biphenyl, 4,4'-bis [N- (3-acenaphthenyl) -N-phenyl-amino ] Biphenyl, 1,5-bis [N- (1-naphthyl) -N-phenyl-amino] naphthal , 4,4'-bis [N- (9-anthryl) -N-phenyl-amino] biphenyl, 4,4 "-bis [N- (1-antryl) -N-phenyl-amino] p- Terphenyl, 4,4'-bis [N-2-phenanthryl) -N-phenyl-amino] biphenyl, 4,4'-bis [N- (8-fluoranthenyl) -N-phenyl-amino] Biphenyl, 4,4'-bis [N- (2-pyrenyl) -N-phenyl-amino] biphenyl, 4,4'-bis [N- (2-perylenyl) -N-phenyl-amino ] Biphenyl, 4,4'-bis [N- (1-coroneyl) -N-phenyl-amino] biphenyl, 2,6-bis (di-p-tolylamino) naphthalene, 2,6-bis [Di- (1-naphthyl) amino] naphthalene, 2,6-bis [N- (1-naphthyl) -N- (2-naphthyl) amino] naphthalene, 4,4 "-bis [N, N -Di (2-naphthyl) amino] terphenyl, 4,4'-bis {N-phenyl-N- [4- (1-naphthyl) phenyl] amino} biphenyl, 4,4'-bis [N -Phenyl-N- (2-pyrenyl) -amino] biphenyl, 2,6-bis [N, N-di (2-naphthyl) amino] fluorene, 4,4 "-bis (N, N- Di-p-tolylamino) terphenyl, bis (N-1-naphthyl) (N-2-naphthyl) amine, and the like. And the well-known thing used for the construction of the conventional organic electroluminescent element can be used suitably.

Moreover, what disperse | distributed and polymerized the organic compound mentioned above in a polymer can also be used, and the polymer of poly (N-vinylcarbazole) and polysilanes can also be used.

The dopant is not particularly limited as long as it is a fluorescent organic compound, and known coumarin derivatives, dicyano methylenepyran derivatives, dicyano methylenethiopyran derivatives, and fluorescein as laser dyes in addition to the above electron transport materials, hole transport materials, and light emitting materials. Pigments such as derivatives, perylene derivatives, or porphyrin derivatives can be used.

As the organic compound which can be used as the electron transporting layer, an electron transporting organic compound can be used among the above-mentioned light emitting layer host materials. In addition, Japanese Patent Laid-Open No. 63-295695, Japanese Patent Laid-Open No. 8-225572, and Patent Publication As the metal chelate complex compounds disclosed in Japanese Patent Application Laid-Open No. Hei 8-81472, Japanese Patent Laid-Open Publication No. Hei 5-9470 and Japanese Patent Laid-Open Publication No. Hei 5-17764, in particular, a metal chelating oxide compound, tris (8-quinolinorate) aluminum, Bis (8-quinolinorate) magnesium, bis [benzo (f) -8-quinolinorate] zinc, bis (2-methyl-8-quinolinorate) aluminum, tris (8-quinolinorate) indium, tris 8- such as (5-methyl-8-quinolinorate) aluminum 8-quinolinorate lithium, tris (5-chloro-8-quinolinorate) gallium, bis (5-chloro-8-quinolinorate) calcium Ligand for quinolinorate or its derivatives As such, a metal complex having at least one is preferably used.

As the hole transporting layer, a hole transporting organic compound such as arylamines can be used in the light emitting layer host material. The thing which disperse | distributed the constant organic compound in a polymer, and a polymerization can also be used. So-called π conjugated polymers such as polyparaphenylene vinylene, derivatives thereof and polyalkylthiophene derivatives, hole-transport nonconjugated polymers represented by poly (N-vinylcarbazole), and sigma conjugated polymers of polysilanes Can also be used.

Although there is no limitation in particular as a hole injection layer, Conductive polymers, such as metal phthalocyanines, such as copper phthalocyanine, metal-free phthalocyanines, a carbon film, and polyaniline, can be used suitably. Furthermore, Lewis acid may be applied to the arylamines as an oxidizing agent to form radical cations and used as hole injection layers.

As an electromagnetic wave irradiation method (exposure method), well-known exposure methods, such as scanning of a laser beam, can be used besides the last exposure method and the projection exposure method using a photomask.

As the electromagnetic wave, those having a suitable energy level such as ultraviolet light, X-rays, and γ-rays can be used.

As the various organic films used in the present invention, known thin film deposition methods such as vacuum deposition, sputtering and coating can be used.

In the multicolor organic EL device according to the fourth aspect of the present invention, pixels which emit light of three types of red, green, and blue by modification are used side by side, and the red, green, and blue dots are arranged side by side. In the case of lamination, for example, it is necessary to perform lamination such as electrode / red organic layer / electrode / green organic layer / electrode / blue organic layer / electrode, and each layer is a separate process. In the case of parallel side-by-side, it is good to just install an electrode after making three kinds of light emitting layers of red, green, and blue side by side, and it is very advantageous because there are very few processes.

In the element which constitutes one pixel from three types of RGB and arranges these pixels in parallel arrangement, time division driving is performed by using one of the two electrodes as the signal electrode and the other as the scan electrode. The image can be formed into a so-called passive matrix RGB dot matrix display or full color display.

Furthermore, a reactive matrix type RGB dot matrix display and a full color display can be obtained by adding an active element such as a transistor to each pixel of the RGB multicolor element to exhibit a memory function.

According to the present invention, it is possible to modulate the bladder color from the device by irradiating an organic layer having a dye which can be two or more kinds of light-emitting centers in the device manufacturing process to deteriorate an arbitrary dye, and thereby to partially irradiate the light. This makes it possible to arrange elements with different emission colors on the same substrate extremely easily, and can be widely used for multicolor display elements and the like.

In particular, by arranging light emitting elements of three layers of red, green, and blue as one pixel on a substrate, it can be widely used as a display of multi-color or full color.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an organic EL device, a method of manufacturing the same, and a display using the same, which have high luminous efficiency and can be easily multicolored.

In order to achieve the above object, the organic EL device of the present invention uses an organic dye which can be two or more kinds of light emitting centers, and partially irradiates (electrons) the electromagnetic light emitting layer to the organic light emitting dye layer during the device construction process. Any one or more types of dyes are denatured by photooxidation or photolysis, and as a result, the color of the light is irradiated from the light-exposed part and the unexposed part is different by changing the light emission color by making the dye into a light-emitting center impossible or functionally insufficient. It has been found that the present invention has been completed. The electromagnetic wave used in the present invention is in the range of about 10 ^-17 to 10 ⁵ m as a vacuum wavelength, and includes gamma rays, X rays, ultraviolet rays, visible rays, infrared rays, and the like, particularly ultraviolet rays or visible rays. .

A first aspect of the present invention relates to a multicolor organic EL device comprising: a light emitting layer containing at least two or more organic dyes as light emitting centers, wherein at least one organic dye is modified to change the color of light emitted from the device; will be. The light emitting layer may be formed of only one layer or may be formed of a plurality of layers.

In the second aspect of the present invention, after forming a light emitting layer containing at least two or more types of organic pigments serving as a light emitting center, the light emitting layer is partially irradiated with electromagnetic waves to modify at least one of the organic colors. The manufacturing method of an element is related.

In the third aspect of the present invention, in the method of producing a multicolor organic EL device having one or more light emitting layers containing an organic dye serving as a light emitting center, the entire surface of an arbitrary light emitting layer or partially radiated may be present in the irradiated portion. The manufacturing method of the multicolor organic electroluminescent element characterized by denaturing at least 1 type of said organic pigment | dye.

A fourth aspect of the present invention is an organic electroluminescent device having a light emitting layer composed of at least one organic compound, wherein at least three types of organic pigments emitting at least blue, green, and red light, which may be light emitting centers, are formed in the light emitting layer. The present invention relates to a multicolor organic EL device comprising at least one of which is modified to change the color of emitted light from a pixel.

Although an Example is given to the following and this invention is demonstrated, this invention is not limited by these.

Production Example

The polymer used in the Example of this invention was synthesize | combined as follows. The scheme is shown below.

(1) 120 ml of DMSO was added as a solvent to 10.0 g (29.7 mmol) of N, N'-diphenylbenzidine, 8.38 g (59.4 mmol) of p-fluoronitrobenzene, and 4.5 g (29.7 mmol) of cesium fluoride. It stirred at 100 degreeC under 24 hours. After completion of the reaction, the mixture was poured into 2500 ml of cold water with stirring to obtain a crude crystal of N, N'-diphenyl-N- (4-nitrophenyl) -1,1'-biphenyl-4,4'-diamine (NTDP) ( Viii). Thereafter, vacuum drying was performed at 60 ° C for 12 hours.

(2) NTPD 14.2 g (31.1 mmol), iodobenzene 12.7 g (62.2 mmol), potassium carbonate 21.5 g (156 mmol) and activated copper 9.88 g (156 mmol) were added, and the mixture was stirred at 220 ° C. for 36 hours under a nitrogen atmosphere. After the reaction was completed, the reaction mixture was dissolved in 1,2-dichloroethane solution and filtered to remove copper. After 1,2-dichloroethane was removed by an evaporator, purification was carried out by column chromatography (developing solvent, 1,2-dichloroethane: n-hexane = 1: 1, Rf = 0.52) to obtain N, N. '-Diphenyl-N- (4-nitrophenyl) -N'-(phenyl) -1,1'-biphenyl-4,4'-diamine (NPTPD) was obtained.

(3) 140 ml of DMF was added to 3.50 g (9.19 mmol) of NPTPD and 1.83 g of 5% palladium / carbon, followed by reduction reaction of nitro group at room temperature, atmospheric pressure and hydrogen atmosphere. After the reaction was completed, the palladium / carbon was filtered off, and the filtrate was poured into cold water (1800 ml) while stirring to give N, N'-diphenyl-N- (4-aminophenyl) -N '-(phenyl) -1, Crude crystals of 1'-biphenyl-4,4'-diamine (APTPD) were obtained.

(4) 2.63 g (5.04 mmol) of APTPD and 0.51 g (5.04 mmol) of triethylamine were dissolved in 40 ml of benzene, and then 0.79 g (7.56 mmol) of methacrylic acid chloride diluted with 5.0 ml of benzene was added dropwise with stirring at 10 ° C. It was made to react for 36 hours. After completion of the reaction, the reaction mixture was filtered to remove triethylamine hydrochloride, washed in the order of 1N HCl, 1N NaOH, water, dried overnight with anhydrous magnesium sulfate, and then the solvent was removed from the evaporator to contain triphenyldiamine N. Crude crystals of -substituted methacrylamide (TPDMA) were obtained. Thereafter, the mixture was purified by column chromatography (developing solvent, 1,2-dichloroethane, Rf = 0.50) (yield: 74.4%, 2.14 g), and then recrystallized in a mixed solvent of benzene: cyclohexane to give white color. Needle crystals were obtained.

Yield: 38.5% (2.04 g)

Melting Point: 175.5 ~ 176.2 ℃

Elemental analysis value (as C ₄₀ H ₃₃ N ₃ O ₁ ):

Analytical Value: C84.23%, H6.08%, N7.06%

Calculated Value: C84.03%, H5.82%, N7.35%

(5) 1.13 g (1.98 mmol) of TPDMA and 0.0321 g (0.198 mmol) of azoisobutyronitrile (AIBN), an initiator, were dissolved in 14.0 ml of benzene in a coke-branched flask. Time reaction was performed. After completion of the reaction, the mixture was poured into methanol (20 times) and the triphenyldiamine-containing N-substituted methacrylamide polymer (PTPDMA) was precipitated. The purification was subjected to five reprecipitation purification (benzene / methanol). The structure was confirmed by IR spectra, ¹ H NMR spectra and elemental analysis. The polymerization reaction was confirmed by loss of peak based on protons of double bonds of δ (ppm) = 5.4 (S, 1H, CH ₂ ) and 5.8 (S, 1H, CH ₂ ) in ¹ H NMR.

Yield: 94.4% (1.07 g)

Weight average molecular weight: 2.7 × 10 ⁴ [DMF (LiBr), polystyrene equivalent]

Elemental analysis value (as C ₄₀ H ₃₃ N ₃ O ₁ ):

Analytical Value: C83.16%, H5.93%, N7.33%

Calculated Value: C84.03%, H5.82%, N7.35%

Example 1

(1) When there is no light irradiation

1 is a cross-sectional view showing a manufacturing process of one embodiment of the present invention. 1 is a glass substrate, and ITO (indium-tin oxide) of 2 sheet resistance of 15 mA / square is coated. The following formula having 1% by weight, 3% by weight, 5% by weight and 7% by weight of yellowish colored light was obtained with respect to the polymer PTPDMA synthesized in the above-described preparation having hole transportability and blue violet emission.

A polymer layer (rubber dispersed PTPDMA layer) 3 having a thickness of 600 kPa was formed by spin coating using a 1,2-dichloroethane solution of PTPDMA each containing rubrene represented by.

Next, the following formula with green light emission as the electron transporting layer 4 on the above-described polymer layer 3

A tris (8-quinolinorate) aluminum complex layer (hereinafter referred to as "Alq") 4 (4) was formed by depositing a thickness of 400 kPa under a vacuum of 10 ^-5 Torr. Finally, Mg and Ag (10: 1) were co-deposited at 2000 kPa under the same vacuum degree as the back electrode 5 serving as the cathode. The light emitting area was 0.5 cm long and 0.5 cm wide.

In the above organic EL device, ITO was used as an anode and Mg: Ag as a cathode, and a direct current voltage was applied to observe light emission from the light emitting layer. Luminescence luminance was measured by TOPCON luminance meter BM-8. From this device yellow light emission was observed through the glass surface. By the emission spectra from the respective devices containing 1% by weight, 3% by weight, 5% by weight and 7% by weight of rubrene content shown in Figs. 2 (a), (b), (c) and (d) In this device structure, it was found that rubrene dispersed in PTPDMA functions as a light emitting center. The luminance-voltage characteristic at that time is shown in FIG. 3 (in the drawing, the triangle mark is 1 wt%, the square mark is 3 wt% rubrene, the cross-shaped white circle mark is 5 wt%, 7 wt%), yellow light emission of up to 9000 cd / m ² was obtained at 12 volts as an initial characteristic.

(2) In the case of whole surface light irradiation

Subsequently, the polymer layer 3, in which 3% by weight of rubrene was dispersed on the ITO 2 on the glass substrate 1, was formed in a similar manner to a thickness of 600 kPa, and then the entire surface was subjected to high pressure in the air. The i line of the mercury lamp was irradiated with 240 mJ / cm ² . The Alq was deposited on the polymer layer 3 in the same manner as the above-described device under the vacuum of 10 ^-5 Torr in the thickness of 400 kPa as the electron transporting layer 4, and then Mg and Ag ( 10: 1) were co-deposited to a thickness of 2000 kPa at the same degree of vacuum. The light emitting area was 0.5 cm long and 0.5 cm wide.

In the organic EL device described above, when ITO was used as an anode and Mg: Ag was used as a cathode, and a direct current voltage was applied to observe light emission from the light emitting layer, the light emission color was Alq as green as shown in Fig. 2E. It was found that rubrene did not emit light. The luminance-voltage characteristic at that time is shown in Fig. 4, and as an initial characteristic, green light emission of up to 9000 cd / m ² was obtained at 10 volts.

(3) In the case of partial light irradiation

Subsequently, after forming the polymer layer 3 which disperse | distributed 3 weight% of rubrene with respect to the polymer on the ITO (2) on the glass substrate 1 by the thickness of 600 kPa by the same method [FIG. 1 (1), (2)], the photomask 9 was brought into close contact with the polymer surface to partially irradiate 240 mJ / cm ² of the i-line of the high-pressure mercury lamp (see (3) in FIG. 1). On the polymer layer 3, as in the above-described device, Alq was formed by evaporation to a thickness of 400 kPa under a vacuum of 10 ^-5 Torr (see Fig. 1 (4)) as the electron transporting layer 4, and then became a cathode. As the electrode 5, Mg and Ag (10: 1) were vapor-deposited at 2000 kV at the same vacuum degree (see FIG. 1 (5)). The light emitting area was 0.5 cm long and 0.5 cm wide.

In the above organic EL device, when ITO was used as an anode and Mg: Ag was used as a cathode, and a direct current voltage was applied to observe light emission from the light emitting layer, the unexposed portion emitted green light and the exposed portion emitted yellow light. This device is a multicolor display device having different emission colors on the same substrate.

Example 2

(1) When there is no light irradiation

5 is a cross-sectional view of Example 2. FIG. 1 is a glass substrate, and ITO (indium-tin oxide) of 2 sheet resistance of 15 mA / square is coated. The expression below

The hole-transporting N, N'-bis (3-methylphenyl) -1,1'-biphenyl-4,4'-diamine (hereinafter referred to as "TPD") represented by the following was subjected to 400 kPa under a vacuum of 10 ^-6 Torr. It was deposited to a thickness of to form a hole transport layer (6). Subsequently, Alq and rubrene were co-deposited at a thickness of 600 kPa under a vacuum of 10 ^-5 Torr so that the ratio of Alq and rubrene as the electron transporting light emitting layer 7 was 97 wt.%: 3 wt.%. 7) was formed. Finally, Mg and Ag (10: 1) were co-deposited to a thickness of 2000 kPa at the same vacuum degree as the back electrode 5 serving as the cathode. The light emitting area was 0.5 cm long and 0.5 cm wide.

In the above organic EL device, ITO was used as an anode and Mg: Ag as a cathode, and a direct current voltage was applied to observe light emission from the light emitting layer. From this device, yellow light emission was observed through the glass plane, and from the light emission spectrum from the device, it was found that in this device structure, rubrene existing in the Alq layer functions as a light emission center.

(2) In the case of whole surface light irradiation

Subsequently, TPD is formed on the ITO (2) on the glass substrate (1) in the same manner as before to form a layer (6) having a thickness of 400 mm3, and Alq and rubrene are formed at the same ratio as above from 10 ^-5 Torr. After co-depositing to a thickness of 600 kPa under vacuum of to form the Alq-rubrene layer 7, the i-line of the high-pressure mercury lamp was irradiated with 1200 mJ / cm ² on the whole surface in air. Mg and Ag (10: 1) were co-deposited to a thickness of 2000 kPa under the same vacuum degree as a back electrode 5 serving as a cathode on the Alq-rubrene layer 7. The light emitting area was 0.5 cm long and 0.5 cm wide.

In the organic EL device described above, when ITO was used as an anode and Mg: Ag was used as a cathode, and light emission from the light emitting layer was observed by applying a direct current voltage, the light emission color was Alq as green, and rubrene was photooxidized and did not emit light. I knew.

(3) In the case of partial light irradiation

Subsequently, TPD is formed on the ITO (2) on the glass substrate (1) in the same manner as before to form a layer (6) having a thickness of 400 mm3, and Alq and rubrene are formed at the same ratio as above from 10 ^-5 Torr. Co-deposited to a thickness of 600 kPa under a vacuum of to form an Alq-rubrene layer 7, the photomask 9 was brought into close contact with the surface of the organic film, and partially the i-line of the high-pressure mercury lamp was 1200 mJ / cm ² in the air. Investigate. Mg and Ag (10: 1) were co-deposited to a thickness of 2000 kPa at the same degree of vacuum as the back electrode 5 serving as the cathode, as in the element described above on the Alq-rubrene layer 7. The light emitting area was 0.5 cm long and 0.5 cm wide.

In the organic EL device described above, when ITO was used as an anode and Mg: Ag was used as a cathode, and a direct current voltage was applied to observe light emission from the light emitting layer, the exposed portion emitted green light of Alq, and the unexposed portion turned yellow of rubrene. Light emission. This device is a multicolor light emitting device having different emission colors on the same substrate.

Example 3

(1) When there is no light irradiation

6 is a cross-sectional view of Example 3. FIG. 1 is a glass substrate, and ITO (indium-tin oxide) of 2 sheet resistance of 15 mA / square is coated. A 30 wt.% Electron transporting 1,3,4-oxadiazole relative to poly (N-vinylcarbazole) (PVK) having hole transporting and emitting peaks in the blue region (410-420 nm). PBD), 1,1,4,4-tetraphenyl-1,3-butadiene (hereinafter referred to as TPB), a 5 wt.% Blue luminescent dye, and a 1,2-dichloroethane solution containing 3 wt. The polymer film 8 was formed to a thickness of 1000 mm by spin coating. Finally, a layer 5 of Mg and Ag (10: 1) was co-deposited to a thickness of 2000 kPa at the same degree of vacuum as the cathode electrode. The light emitting area was 0.5 cm long and 0.5 cm wide.

In the above organic EL device, ITO was used as an anode and Mg: Ag as a cathode, and a direct current voltage was applied to observe light emission from the light emitting layer. As the initial characteristic, the emission luminance was obtained at a yellow light emission of a maximum luminance of 2200 cd / m ² at 16 volts. It was confirmed that the emission center from the emission spectrum was rubrene.

(2) In the case of whole surface light irradiation

Subsequently, a PVK layer 8 containing 30 wt.% PBD, 5 wt.% TPB, and 3 wt.% Rubrene is formed on the ITO 2 on the glass substrate 1 in the same manner as described above. 120mJ / cm < ² > of i line | wires of the high pressure mercury lamp were irradiated to the whole surface. On the polymer layer 8, Mg and Ag (10: 1) were vapor-deposited at 2000 kV as the back electrode 5 serving as a cathode. The light emitting area was 0.5 cm long and 0.5 cm wide.

In the organic EL device described above, when ITO was used as an anode and Mg: Ag was used as a cathode, and light emission from the light emitting layer was observed by applying a DC voltage, the emission color was blue as that of TPB, and rubrene was not photoacidified and did not emit light. I knew.

(3) In the case of partial light irradiation

Subsequently, a PVK layer 8 containing 30 wt.% PBD, 5 wt.% TPB, and 3 wt.% Rubrene was formed on ITO 2 on the glass substrate 1 in the same manner as above. The mask 9 was brought into close contact with the polymer surface to partially irradiate the i-line of the high-pressure mercury lamp with 120 mJ / cm ² in the air. Mg and Ag (10: 1) were co-deposited to a thickness of 2000 kPa under the same vacuum degree as a back electrode 5 serving as a cathode on the polymer layer 8. The light emitting area was 0.5 cm long and 0.5 cm wide.

In the organic EL device described above, when ITO was used as an anode and Mg: Ag was used as a cathode, and a light emission from the light emitting layer was observed by applying a DC voltage, the light emission color of the light irradiation part was blue as that of TPB, and the light emission of the unexposed part was yellow. As light emission of rubrene. This device is a multicolor light emitting device having different emission colors on the same substrate.

Example 4

Example 4-1: (Control)

7 is a cross-sectional view of an embodiment of the present invention. 21 is a glass substrate, and ITO (indium-tin oxide) of 22 sheet resistance / (square) is coated. Equation below with hole transporting and blue violet on it

30% by weight of electron transportability with respect to poly (N-vinylcarbazole) (hereinafter sometimes abbreviated as PVK) represented by

1,3,4-oxadiazole derivative (PBD), 1,1,4,4-tetraphenyl-1,3-butadiene (TPB), which is 3 mol. A pigment-containing polymer film was formed by spin coating to a thickness of 1000 kPa using a 1,2-dichloroethane solution containing 1 mol.% Green luminescent coumarin 6 and 1 mol.% Red luminescent nile red. Subsequently, Mg and Ag (10: 1) were co-deposited at 2000 kPa under the same vacuum degree as a back electrode serving as a cathode. The light emitting area of each element was made into a square shape 0.5 cm long and 0.5 cm wide.

In the organic electroluminescent device described above, light emission from the light emitting layer was observed by applying ITO as an anode and Mg: Ag as a cathode and applying a DC voltage. From this device, red light emission was observed through the glass surface. Therefore, it was found that the device structure moves to the lowest nile red of the excitation energy unit of all the dyes by the energy transfer between the dopant dyes, and only the nile red functions as the emission center. This result was the same as the device already reported [j. Kido, H. Shionoya and K. Nagai, Appl. Phys. Lett. 67, 2281 (1995).

Example 4-2:

Subsequently, a 1000 kPa dye-dispersed PVK layer was formed on ITO on the glass substrate in the same manner, and then, by using a high-pressure mercury lamp in the air, a high pressure corresponding to the absorption band of Nile red in the air was irradiated in the air so that only Nile red was photooxidized. It was made non-luminous. Mg and Ag (10: 1) were vapor-deposited at 2000 kV as a back electrode serving as a cathode on the pigment-dispersed PVK layer.

In this organic EL device, light emission from the light emitting layer was observed using ITO as an anode and Mg: Ag as a cathode, and the light emission color was green as coumarin 6, and nile red did not emit light. there was.

Example 4-3:

Subsequently, 1000 kV of pigment dispersed in ITO on the glass substrate was formed in the same manner, and then irradiated with light using a high-pressure mercury lamp in the air, and then irradiated with light corresponding to the absorption band of Nile Red in the air, and then replacing the filter. By irradiating light corresponding to the absorption band of coumarin 6, both nile red and coumarin 6 were photooxidized and made non-luminescent. Mg and Ag (10: 1) were deposited at 2000 kV at the same vacuum degree as a back electrode serving as a cathode on the polymer layer.

In the organic EL device, when ITO was used as an anode and Mg: Ag as a cathode, a direct current voltage was applied to observe light emission from the light emitting layer. As a result, the emission color was blue as TPB, and coumarin 6 and nile red did not emit light. Could know.

Example 4-4: (Invention)

Subsequently, 16 glass-shaped stripe-shaped ITO electrodes (represented by 22 in the figure) on the glass substrate 21 were arranged at equal intervals in parallel with each other (see FIGS. 8A and 9), and the PVK layer 23 in which the pigments were dispersed. After forming 1000 microseconds by the same method (FIG. 8B), the photomask is closely adhered to the polymer surface, and the PVK layer 23 which disperse | distributed the pigment | dye was uniformly spaced through the filter using the high pressure mercury lamp partially in the air. Light was irradiated to an area of 2/3 of the whole to denature only Nile Red (Fig. 8C). Subsequently, coumarin 6 was also modified by light irradiation with a stripe shape on the area of 1/2 of the PVK layer 23 in which nile red was modified using a photomask (FIG. 8D). Thereafter, 48 Mg: Ag electrodes (shown as 24 in the figure) having a stripe shape having a width of 1 mm were deposited so as to go directly to the ITO electrode to form a matrix display device (Figs. 8E and 9). When DC voltage was applied using ITO as the anode and Mg: Ag as the cathode, red and green blue light emission was observed through the glass substrate. In this device, it was possible to display an image in RGB by emitting light of each pixel by time division driving using ITO as a scan electrode and Mg: Ag as a signal electrode.

As a driving method, an active matrix element such as a transistor is added to each pixel of the RGB multicolor element to exhibit a memory function, thereby making it possible to obtain an active matrix type RGB dot matrix display and a full color display.

Claims (9)

A light emitting layer containing at least two or more types of organic dyes which may serve as light emitting centers, wherein at least one organic dye is modified to change the color of light emitted from the device. A method for producing a multicolor organic EL device, comprising: forming a light emitting layer containing at least two organic dyes that may serve as a light emitting center, and then modifying the at least one organic dye by partially radiating the light emitting layer with electromagnetic waves. In the method of manufacturing a multicolor organic EL device having one or more light emitting layers containing an organic dye which can be a light emitting center, at least one species present in the irradiated portion by irradiating the entire surface of the light emitting layer or partly with electromagnetic waves. A method for producing a multicolor organic EL device, wherein the organic dye is modified. An organic electroluminescent device having a light emitting layer composed of at least one organic compound, the organic electroluminescent device comprising at least three organic pigments emitting at least blue, green, and red, which can be the light emitting center, and at least one of them. A multicolor organic EL device, wherein a species is modified to change the color of emitted light from a pixel. An organic electroluminescent device having a light emitting layer composed of at least one organic compound, the organic electroluminescent device comprising at least three organic pigments emitting at least blue, green, and red, which can be the light emitting center, and at least one of them. A multicolor organic EL device characterized in that a species is modified to change the color of light emitted from a pixel. The multicolor organic EL device in which pixels of three types of red, green, and blue light are arranged by modification. The multicolor organic EL device according to claim 4 or 5, wherein the pixels are arranged in a horizontal arrangement in parallel. In the multicolor organic EL device according to claim 5, one pixel is constituted by three kinds of pixels of red, green, and blue, and these pixels are arranged in a horizontal arrangement in parallel, and each line is subjected to linear sequential scanning. Passive matrix type RGB dot matrix display with independent control of pixel emission characteristics. In the multicolor organic EL device according to claim 5, pixels are constituted by three kinds of pixels of red, green, and blue, these pixels are arranged in parallel in parallel, and an active element is added to each pixel. Active matrix RGB dot matrix display with memory capabilities. A full color dot matrix display wherein the display of claim 7 expresses full color.