WO2007114256A1 - Organic electroluminescence multicolor display panel - Google Patents

Abstract

An organic electroluminescence multicolor display panel includes a plurality of organic electroluminescence elements which are arranged on a substrate and emit light of two or more colors. Each of the organic electroluminescence elements is composed of a first electrode, laminated organic material layers including at least an organic light emitting layer, and a second electrode, which are laminated in sequence from the substrate side. The display panel is provided with a light scattering layer which is arranged on a side from which emitted light is taken out so that the emitted light is transmitted commonly to the organic electroluminescence elements. The light scattering layer has light scattering effects.

Description

 Specification

 Organic electroluminescent multicolor display panel

 The present invention uses an organic compound exhibiting electroluminescence (hereinafter also referred to as EL) that emits light by current injection, and includes an organic EL layer that is made of an organic EL material. The present invention relates to an organic EL multicolor display panel that also has multiple elements.

 Background art

 In general, an organic EL element using an organic compound material is a current injection type element having diode characteristics, and emits light with a luminance corresponding to the amount of current. A display panel has been developed by arranging multiple organic EL elements that emit two or more colors in a matrix.

 [0003] For example, each of the organic EL elements includes a transparent anode as a first electrode, a plurality of organic material layers including an organic light emitting layer, and a metal negative electrode as a second electrode on a glass substrate as a display surface (observer side). It has a structure in which poles are sequentially stacked (bottom emission type). In addition, as an organic material layer, as a functional layer sandwiching an organic light emitting layer, a hole transporting functional layer (hole injection layer, hole transporting layer) on the anode side and an electron transporting functional layer (electron injection layer, electron transporting layer on the cathode side). ) Is set as appropriate. A top emission type organic EL display panel is also known in which the display surface is reversed and the first electrode is a metal electrode and the second electrode is a transparent electrode. In general, the one that emits light from the opposite side of the substrate is the top emission type organic EL panel and the one that emits light from the substrate side is the bottom emission type organic EL panel and the one that is opposite the substrate side and the substrate side. There are also a transparent OLED panel and a cocoon type that extract light from both.

[0004] An organic EL element in which the thickness of the ITO anode and the plurality of organic material layers is variously set so that the desired wavelength of the light obtained from the organic light-emitting layer becomes a peak wavelength is a multicolor light-emitting display panel (full-color, multi-color). As shown in Fig. 1, it is necessary to change the thickness of the organic material layer 42 in accordance with pixels having different emission colors, that is, organic EL elements. This is because the optimum film thickness of the optical interference differs for each emission color, so that the light emission is prevented from being weakened by the optical interference and the light emission efficiency is increased. This OLED multicolor display panel In the channel, a transparent electrode 3 made of an anode such as ITO, a hole transport layer 42 made of an organic compound material, and organic light emitting layers 43B, 43, which are sequentially laminated on a transparent substrate 2 made of glass or the like.

G or 43R, the metal electrode 5 of the cathode, and power.

[0005] In addition, in order to increase the light emission efficiency and the extraction efficiency, the structure of each individual organic EL element is a structure in which the surface of the glass substrate is roughened (see Patent Document 1), and scattering particles are dispersed in a binder polymer. A structure (refer to Patent Document 2) is proposed!

[0006] In the organic EL device described in Patent Document 1, irregularities having an elevation difference of 0.1 111 or more and 0.21 m or less are formed on the outer side of the electrode composed of the pair of anode and cathode and on the side from which light emission is emitted. A transparent or translucent substrate on the surface is provided.

[0007] In the organic EL element described in Patent Document 2, on at least one surface of the translucent substrate

In addition, a region where reflection and refraction angle are disturbed with respect to light emitted from the light emitting element is provided, and the region is composed of a scattering layer containing fine particles and a binder.

 Patent Document 1: Japanese Patent Laid-Open No. 9-63767

 Patent Document 2: Japanese Patent Publication No. 03Z026357

 Disclosure of the invention

 Problems to be solved by the invention

[0008] In the conventional organic EL multicolor display panel, the thickness of the transparent anode and the plurality of organic material layers is emitted so that the desired wavelength of light obtained from the organic light emitting layer becomes the peak wavelength for each organic EL element. Each color is set separately. Since the film thickness of the organic material layer changes for each luminescent color, even with the same organic material, a vapor deposition device is also required for each luminescent color, requiring a film formation process that coats the organic material with a shadow mask, which is complicated. Become.

However, in the prior art, the ability of the light scattering structure cannot be fully exhibited.

[0010] Therefore, the present invention provides an example of providing an organic EL multicolor display panel that is easy to manufacture.

 Means for solving the problem

[0011] The organic EL multicolor display panel of the present invention includes a substrate and a plurality of organic EL elements arranged on the substrate and exhibiting two or more colors of emitted light, each of the organic EL elements being on the substrate side The first electrode laminated in order from the laminated, including at least the organic light emitting layer An organic EL multicolor display panel comprising an organic material layer and a second electrode, disposed on the side from which the emitted light is extracted so that the emitted light is transmitted in common to the plurality of organic EL elements. And a light scattering layer having a light scattering effect.

[0012] According to the configuration described above, the feature that the optical interference effect is greatly reduced by the presence of the light scattering structure is fully activated, and the material / film thickness between the light scattering structure and the light emitting layer is reduced. Thus, a structure in which the material thickness between the light emitting layer and the reflective electrode is aligned regardless of the emission color is possible.

 [0013] That is, as long as each luminescent color is a commonly used material, it can be formed at once without separately coating the organic film for each color. This reduces the number of vapor deposition devices, eliminates the need for mask alignment with high-definition pixels, and improves the material utilization effect.

 Brief Description of Drawings

FIG. 1 is a schematic partial cross-sectional view showing an organic EL multicolor display panel.

 FIG. 2 is a schematic partial sectional view showing an organic EL multicolor display panel according to another embodiment of the present invention.

 FIG. 3 is a schematic partial cross-sectional view showing an organic EL multicolor display panel according to another embodiment of the present invention.

 FIG. 4 is a schematic partial sectional view showing an organic EL multicolor display panel according to another embodiment of the present invention.

 FIG. 5 is a schematic partial sectional view showing an organic EL multicolor display panel according to another embodiment of the present invention.

 FIG. 6 is a schematic partial sectional view showing an organic EL multicolor display panel according to another embodiment of the present invention.

 FIG. 7 is a schematic partial sectional view showing an organic EL multicolor display panel according to another embodiment of the present invention.

 Explanation of symbols

[0015] 4 Organic material layer

 6 Light scattering layer

12 Board 13 First electrode

 15 Second electrode

 42 Hole transport layer

 43B, 43G, 43R organic light emitting layer

 44 Electron transport layer

 BEST MODE FOR CARRYING OUT THE INVENTION

Embodiments of an organic EL device and a method for manufacturing the same according to the present invention will be described with reference to the drawings.

 In the first embodiment, an organic EL multicolor display panel will be described in which a hole transport layer is formed of a common organic compound material as an organic material layer regardless of the emission color.

 FIG. 2 is a schematic partially enlarged cross-sectional view of an organic EL multicolor display panel. This organic EL multicolor display panel also has a plurality of organic EL element powers, and each organic EL element is sequentially laminated on a substrate 12 (for example, a transparent substrate such as glass), and the first electrode 13 (for example, ITO or the like). Transparent electrode of the anode) and organic material layer 4 (hole transport layer (common layer) 42 which is an organic compound material), organic light emitting layer 43B, 43G or 43R, which is an organic compound material, An electron transport layer (common layer) 44) made of an organic compound material and a second electrode 15 (for example, a metal electrode as a cathode) also serve as a force. Further, a sealing film (not shown) made of SiN or the like is formed on the second electrode 15.

 Four

 Each organic EL element is shielded from the outside air. The transparent electrode 3 and the metal electrode 5 each having a parallel striping force are orthogonal to each other, and each organic EL element is arranged in parallel at the intersection.

 [0019] The organic light-emitting layers 43B, 43G, and 43R that are separately and separately laminated have different organic compound material powers that exhibit blue, green, and red with different emission colors when current is applied. In this way, the organic EL multicolor display panel is composed of a set of organic EL elements of blue, green and red light emission colors as one pixel, for example, in a matrix arrangement of these plural pixels.

 [0020] The hole transport layer (common layer) 42 is a common layer having a continuous constant film thickness that has the same material force as that of the adjacent organic EL element.

As described above, the organic material layer 4 includes the hole transport layer and the electron transport layer disposed on the opposite sides with respect to the organic light emitting layers 43B, 43G, and 43R. One of them may be provided as the organic material layer 4 common layer. Furthermore, the organic material layer 4 can be provided with a hole injection layer and an electron injection layer arranged outside the hole transport layer and the electron transport layer (not shown) with respect to the organic light emitting layers 43B, 43G, and 43R, respectively. Also, at least one of them can be provided depending on the layer form.

 [0022] The organic material layer 4 common layer has the same film thickness even if it corresponds to different emission colors. That is, in the organic EL element, the organic light emitting layers 43B, 43G, and 43R have the same film thickness as the organic material layer 4 up to the electrodes.

 [0023] The light scattering layer 6 having a light scattering effect with a uniform film thickness extracts emitted light so that the emitted light is transmitted in common to the plurality of organic EL elements of the organic light emitting layers 43B, 43G, and 43R. In other words, it is commonly disposed between the first electrode 13 on the substrate 12 side and the substrate 12. The light scattering layer 6 has a light scattering rate of 30% or more. However, scattering rate = (parallel light transmittance without light scattering layer, parallel light transmittance with light scattering layer) / (parallel light transmittance without light scattering layer). Therefore, the first electrode 13 and the organic material layer 4 of the organic EL element can be formed with a constant film thickness by the light scattering layer 6 without changing the film thickness.

 Thus, in the organic EL multicolor display panel, the light scattering layer 6 having a light scattering effect is arranged on the side from which the emitted light is extracted so that the emitted light is transmitted in common to the plurality of organic EL elements. It only has to be. As described above, the organic EL multicolor display panel includes the substrate 12 and a plurality of organic EL elements arranged on the substrate 12 and exhibiting two or more emission colors, and each of the organic EL elements is a substrate 12 side cover. The first electrode 13 (transparent electrode), the organic material layer 4 (hole transport layer, electron transport layer, etc.) including at least the organic light emitting layers 43B, 43G, 43R, and the second electrode. 15 (metal electrode). Here, in the organic EL multicolor display panel of the above example, the light scattering layer 6 is disposed between the first electrode 13 and the substrate 12 close to the substrate 12 of the organic EL element, and the first electrode 13 and the substrate 12 are transmissive. As a matter of fact, the substrate 12 side force is also a bottom emission type because the emitted light is taken out.

[0025] The organic material layers ⁴ from the first electrode 13 to the organic light emitting layers 43B, 43G, and 43R are respectively laminated in common to a plurality of organic EL elements and have the same film thickness. The organic material layer 4 from the second electrode 15 to the organic light emitting layers 43B, 43G, and 43R is shared by multiple organic EL devices. Laminated and have the same film thickness. The absolute value of the refractive index difference between any two adjacent layers in the organic material layer 4 is 0.25 or less. That is, as seen from the observer side, the transparent electrode, the charge injection layer, and the charge transport layer are in contact with each other in this order, and the refractive index of each layer of the organic material layer 4 is the charge injection layer: When nl and the charge transport layer: n2, it is desirable to reduce the refractive index step so that the relationship satisfies the relationship I nl-n2 I <0.25 in the wavelength region of 450 to 630 nm.

 [0026] The organic EL multicolor display panel is not limited to the bottom emission type. As shown in FIG. 3, the light scattering layer 6 is formed on the main surface of the second electrode 15 far from the substrate 12 opposite to the organic material layer 4 of the organic EL element, and is transmitted through the second electrode 15. As a characteristic, the second electrode 15 side force may be a top emission type from which emitted light is extracted. Further, as shown in FIG. 4, a sealing plate 16 may be overlaid on the light scattering layer 6 and fixed to the substrate with a spacer (not shown) to block each organic EL element from the outside air. .

 [0027] As another top emission type structure in which the organic EL element is also shielded from external air force, as shown in FIG. 5, the light scattering layer 6 is a substrate on the side opposite to the organic material layer 4 of the organic EL element. Force placed on the main surface side of the second electrode 15 far from 12 The sealing plate 16 has a spacer (not shown) in order to have a sealed air layer (hollow) on the second electrode 15. The light scattering layer 6 may be formed on the inner surface of the sealing plate 16. Further, the inner surface of the sealing plate 16 can be attached to the inner side of the light scattering layer 6 with an adhesive or the like without providing a hollow.

 [0028] An example of the light scattering layer 6 is a scattering particle-containing film in which scattering particles are dispersed in a resin. The scattering particles preferably have a particle size of 0.1-1 μm. Further, the scattering particles are silica, titanium, alumina, etc., for example, preferably TiO.

 Furthermore, the organic EL multicolor display panel may be a bottom emission type in which the light scattering layers 6 are provided on both sides of the substrate 12 as shown in FIG.

 Furthermore, as shown in FIG. 7, while sealing with a sealing plate 16 with a light scattering layer 6, the first electrode 13 and the second electrode 15 are made transmissive, so that the substrate 12 side and the substrate side It is also possible to use a transparent organic EL panel type that extracts light to both the sealing plate 16 on the opposite side.

[0031] As another embodiment, a low refractive index disposed outside the light scattering layer 6 with respect to the organic material layer 4 in the organic EL multicolor display panel in addition to the structure shown in FIGS. Layer Can The low refractive index layer has a refractive index of 1.3 or less, more preferably 1.2 or less. The low refractive index layer preferably contains silica.

 Furthermore, as another embodiment, in addition to the structures shown in FIGS. 2 to 7, a gas barrier disposed on the outside of the first electrode 13 with respect to the organic material layer 4 on the organic EL multicolor display panel. Can be provided. The gas nolia layer is a laminate of a polymer thin film and an inorganic thin film, or a high molecular thin film or an inorganic thin film.

 Furthermore, as another embodiment, instead of the scattering particle-containing film in which the scattering particles of the light scattering layer 6 in the structure shown in FIGS. 2 to 7 are dispersed in the resin, the light scattering layer 6 is provided. It can be a rough surface interface constituting the rough surface. In this case, the substrate 12 and the sealing plate 16 are ground glass, and the rough surface is used as the interface. The rough surface interface preferably has an average roughness Ra that satisfies the relationship d> 5 XRa (where d is the distance between the light-scattering layer 6 and the organic light-emitting layers 43B, 43G, and 43R). Ra (arithmetic mean roughness) is the roughness curve force. The length of the measurement length is extracted in the direction of the average line, the X-axis is the direction of the average line of the extracted part, and the direction of the vertical magnification is the y-axis. The length of the Ra value given when the curve is expressed as y = f (x). The average roughness R a is preferably in the range of lnm to l μm.

 Furthermore, as another embodiment, in addition to the structure shown in FIGS. 2 to 7, the organic material layer 4 is arranged outside the light scattering layer 6 so as to divide a plurality of organic EL elements, and A light absorption layer having a light absorption effect can be provided.

 [0035] As another embodiment, in addition to the structures shown in Figs. 2 to 7, the light scattering layer 6 with respect to the organic material layer 4 so as to increase the color purity of light emitted from a plurality of organic EL elements. A color filter disposed on the outside can be provided.

 [0036] As described above, according to the organic EL multicolor display panel of the above-described embodiment, by utilizing the feature that the influence of optical interference can be reduced by the light scattering structure, the material commonly used for each emission color can be reduced. By aligning the film thickness, the common organic material layer can be formed simultaneously without being separately applied. Panels such as full-color type with two colors, full-color type with two colors, and area power color type, and driving methods such as active drive or passive drive are selected. An organic EL panel with two or more light-emitting pixels on one panel It is effective for.

[0037] In the table below, various organic EL multicolor display panel structures including the above-described embodiment are listed. In summary, the following are listed. The bottom emission and top emission type organic EL multicolor display panel structure is mainly shown. Transparent organic light that extracts light to both substrates. In the case of the EL panel type, the bottom emission type and the top emission type are It can be constructed by combining the organic material layers sandwiched between the first and second electrodes. In addition, in the table below, () shows a mode in which the members listed in () can be structured with and without them [Table 1]

Bottom emission

 Transparent Transparent Reflective structure Scattering layer Substrate Scattering layer First electrode Organic material layer Second electrode

1 ― Substrate (low refractive index layer) Scattered particle containing layer (gas barrier layer) First electrode Organic material layer Second electrode

2-Substrate-Rough surface interface (gas barrier layer) First electrode Organic material layer Second electrode

3 Scattered particle-containing layer Substrate (low refractive index layer) Scattered particle-containing layer (gas barrier layer) First electrode Organic material layer Second electrode

4 Scattered particle-containing layer Substrate-rough surface interface (gas barrier layer) Organic material layer

 5 Rough surface interface Substrate (low refractive index layer) Scattered particle containing layer (gas barrier layer) First electrode Organic material layer Second electrode

6 Rough surface interface Substrate-rough surface interface (gas barrier layer) First electrode Organic material layer Second electrode

cm Top emission

Example

 Example l: Glass substrate Z Low refractive index layer Z Scattered particle-containing film Z Transparent electrode (ιτο) Z Organic light emitting layer, Reflective electrode (Al) t An organic EL panel composed of ヽ ぅ was prepared.

[0041] Asahi Glass Co., Ltd. Alkali-free glass AN100-thickness 0.7mm, 75mm square glass substrate was ultrasonically cleaned in neutral detergent for about 30 minutes, flow washed with pure water, 60 ° C Dried in the oven.

 On the other hand, MS51 (tetramethoxysilane oligomer) 25% by weight, n-butyl alcohol 30% by weight, demineralized water 15% by weight, and ethanol 30% by weight were mixed with an acid catalyst ( A small amount of aluminum acetylacetonate) was added. The mixture was stirred at 60 ° C for 3 hours and left to mature for 1 week.

 [0043] This was coated on the above glass substrate with a spin coater, dried for 15 minutes, dipped in methanol for 5 minutes, pulled up, dried for 5 minutes, heated at 150 ° C for 15 minutes, and further heated to 250 ° A low refractive index layer was formed by heating at C for 15 minutes. The thickness of the obtained low refractive index layer was 300 nm. When the refractive index of the matrix portion of this low refractive index layer was measured with a sopra ellipsometer, it was 1.3 at a wavelength of 550 nm. Further, when the refractive index was measured with a 633 nm laser using a prism coupler model 2010 manufactured by Metricon Inc., the refractive index was 1.3.

 [0044] Next, MS 51 (tetramethoxysilane oligomer) 30% by weight manufactured by Mitsubishi Chemical Corporation, 50% by weight of propyl alcohol, 8% by weight of demineralized water, and 12% by weight of methanol were mixed with an acid catalyst ( A small amount of aluminum acetylacetonate) and further particles containing tantalum particles with an average particle size of 20 Onm (60% weight particle size is 150-250 nm) in butyl alcohol. The dispersion was previously dispersed so that the weight percentage in it was 15% by weight. The mixture was stirred at 60 ° C for 3 hours and left to mature for 1 week. The weight percentage in the particle-containing layer was measured in the same manner as the particle size distribution in the film described above. The density when the matrix was a porous material was determined by determining the X-ray reflectivity or the refractive index.

[0045] This coating solution was applied onto the above-mentioned low refractive index layer on the glass substrate with a dip coater, dried for 15 minutes, immersed in methanol for 5 minutes, pulled up, dried for 5 minutes, and then 15 minutes at 150 ° C. After heating, the mixture was further heated at 250 ° C. for 15 minutes to obtain a light scattering layer. In addition, on the back side during dip coating A protective film was applied, peeled off after application, and a coating film was formed only on one side.

 [0046] The resulting scattering particle-containing film had a thickness of 600 nm, and a structure in which scattering particles overlapped in almost three steps was observed.

 The refractive index of the matrix portion of the light scattering layer was measured with a sopra ellipsometer and found to be 1.40 at a wavelength of 550 nm. Refractive index measurement was also performed using the prism coupler model 2010 of Metricon Inc. in the US, and the refractive index was 1.38 with a laser with a wavelength of 633 nm.

 [0048] The surface roughness of the scattering particle-containing film was measured using P-15 type manufactured by KLA-Tencor Corporation. 0.5 Scanned and measured Ra = 8nm, Rmax = 120nm o

 [0049] The transmission loss light (scattering loss light) with respect to the parallel rays of the scattering particle-containing film was 52% at a wavelength of 550 ηm. A spectrophotometer manufactured by HEURED Packard was used for the measurement, and a glass substrate before forming the coating film was used as a reference.

 [0050] On this scattering particle-containing film, ITO (Indium Tin Oxide) is deposited at a temperature of 115 nm at room temperature to form a transparent electrode, and then, a 30 nm thick coating-type hole injection material PC1 020 manufactured by Mitsubishi Chemical Co., Ltd. is formed. Thereafter, an NPB (naphthylpentylbenzidine) layer of 45 nm and A1Q3 (aluminoquinoline complex, green luminescent dye) of 60 nm were formed by vapor deposition, and finally an aluminum reflective electrode was formed to a thickness of 80 nm by vapor deposition. The refractive index of the ITO layer was measured and found to be 2.04 (550 nm). The obtained EL element is a laminate of a glass substrate Z, a low refractive index layer, a film containing scattering particles, a transparent electrode (ITO), an organic light emitting layer, and a reflective electrode (A1).

 [0051] (Example 2): Scattered particle-containing film Z glass substrate Z low refractive index layer Z scattered particle-containing film Z Transparent electrode (ITO), organic light emitting layer, reflective electrode (Al) t Organic EL A panel was made.

 [0052] In Example 1, an EL element was produced in exactly the same manner as in Example 1, except that dip coating was performed without applying a protective film on the back surface when the light scattering layer was applied. The obtained EL device is a laminate of a scattering particle-containing film Z glass substrate, a low refractive index layer, a scattering particle-containing film Z transparent electrode (ITO), and an organic light emitting layer Z reflecting electrode (A1).

Claims

The scope of the claims  [1] A first including a substrate and a plurality of organic electroluminescent elements disposed on the substrate and exhibiting two or more emission colors, wherein each of the organic electroluminescent elements is stacked in order from the substrate side. An organic electroluminescent multicolor display panel comprising an electrode, a laminated organic material layer including at least an organic light emitting layer, and a second electrode,  An organic electroluminescent device comprising a light scattering layer disposed on the side from which the emitted light is extracted so that the emitted light is transmitted in common to the plurality of organic electroluminescent elements and having a light scattering effect. Sense multicolor display panel.  [2] The light scattering layer is disposed between the first electrode and the substrate of the organic electroluminescence element, the first electrode and the substrate are transmissive, and the emitted light is transmitted from the substrate side. 2. The organic electroluminescent multicolor display panel according to claim 1, wherein the organic electroluminescent multicolor display panel is taken out.  [3] The light scattering layer is disposed on a main surface side of the substrate opposite to the first electrode of the organic electroluminescence element, and the first electrode and the substrate have transparency, and the substrate 3. The organic electroluminescent multicolor display panel according to claim 1, wherein the emitted light is extracted from the side.  [4] The light scattering layer is disposed on a main surface side of the second electrode opposite to the organic material layer of the organic electroluminescent element, the second electrode has transparency, and the second electrode 4. The organic electroluminescent multicolor display panel according to claim 1, wherein the emitted light is extracted from the electrode side.  [5] The organic material layer according to any one of claims 1 to 4, wherein the organic material layer has at least one of a hole transport layer and an electron transport layer disposed on opposite sides with respect to the organic light emitting layer. Organic electroluminescent multicolor display panel. 6. The organic material layer has at least one of a hole injection layer and an electron injection layer disposed outside the hole transport layer and the electron transport layer with respect to the organic light emitting layer, respectively. The organic electroluminescent multicolor display panel according to any one of -5. [7] The organic material layers from the first electrode to the organic light emitting layer are respectively laminated in common on the plurality of organic electroluminescent elements and have the same film thickness. 6. The organic electroluminescent multicolor display according to any one of 6 above.  [8] The organic material layers from the second electrode to the organic light emitting layer are respectively laminated in common with the plurality of organic electroluminescent elements and have the same film thickness. 7. The organic electroluminescent multicolor display according to any one of 7 above.  [9] The absolute value of the difference in refractive index between any two adjacent layers in the organic material layer is 0.25 or less in the wavelength region of 450 to 630 nm, An organic electroluminescent multicolor display panel as described above.  10. The organic electroluminescent multicolor display panel according to any one of claims 1 to 9, wherein the light scattering layer has a light scattering rate of 30% or more.  11. The organic electroluminescent multicolor display panel according to any one of claims 1 to 10, further comprising a low refractive index layer disposed outside the light scattering layer with respect to the organic material layer.  12. The organic electroluminescent multicolor display panel according to claim 11, wherein the low refractive index layer has a refractive index of 1.3 or less in a wavelength region of 450 to 630 nm.  13. The organic electroluminescent multicolor display panel according to claim 11 or 12, wherein the low refractive index layer contains silica.  [14] The organic electroluminescent multi-layer according to any one of [1] to [13], further comprising a gas nolia layer disposed outside at least one of the first electrode and the second electrode with respect to the organic material layer. Color display panel.  15. The organic electroluminescent multicolor display panel according to claim 14, wherein the gas barrier layer is a laminate of a polymer thin film and an inorganic thin film, or a polymer thin film or an organic thin film. 16. The organic electroluminescent multicolor display panel according to any one of claims 1 to 15, wherein the light scattering layer is a scattering particle-containing film in which scattering particles are dispersed. 17. The organic electroluminescent multicolor display panel according to claim 16, wherein the scattering particles have a particle size of 0.1 to Lm.  18. The organic electroluminescent multicolor display panel according to claim 16 or 17, wherein the scattering particles are TiO.  [19] The organic electroluminescent multicolor display panel according to any one of [1] to [15], wherein the light scattering layer includes a rough surface interface constituting a rough surface.  20. The organic material according to claim 19, wherein the rough surface interface has an average roughness Ra that satisfies a relationship of d> 5 XRa (where d is a distance between the light scattering layer and the organic light emitting layer). Electroluminescence multicolor display panel.  [21] The organic material layer includes a light-absorbing layer disposed outside the light-scattering layer and having a light-absorbing effect so as to divide the plurality of organic electroluminescent elements. 21. The organic electroluminescent multicolor display panel according to any one of claims 1 to 20.  [22] The color filter disposed outside the light scattering layer with respect to the organic material layer so as to enhance color purity of light emission from the plurality of organic electroluminescent elements. The organic electroluminescent multicolor display paneeret according to any one of ˜21.  [23] A light scattering film used for the light scattering layer of the organic electroluminescence multicolor display panel according to any one of [1] to [22].