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Organic electroluminescence element

A technology for electroluminescent elements and organic light-emitting layers, which can be applied to electroluminescent light sources, electrical components, organic semiconductor devices, etc., and can solve the problems of scattered reflection and refraction angles, and unclear optical design guidelines.

Inactive Publication Date: 2011-11-23
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of organic electroluminescent element can achieve high brightness and long life, and its future development is very much expected, but its optical design policy has not yet been clarified
In addition, there is no report of providing a region 7 between the light-transmitting electrode 1 and the substrate 6 to scatter the reflection and refraction angles of light in such an organic electroluminescence element.

Method used

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  • Organic electroluminescence element
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  • Organic electroluminescence element

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0102] The light-transmitting substrate 6 provided with the light-scattering layer 7 was produced as follows. First, add 803.5 g of isopropyl alcohol to 86.8 g of tetraethoxysilane, then add 34.7 g of γ-methacryloxypropyl trimethoxysilane and 75 g of 0.1N-nitric acid, and mix well with a mixer to obtain solution. The obtained solution was stirred in a 40 degreeC thermostat for 2 hours, and the 5 mass % solution of the silicone resin with a weight average molecular weight of 1050 was obtained as a binder formation material.

[0103] To this silicone resin solution, methyl silicone particles (average particle diameter 2 μm, manufactured by GE TOSHIBA SILICONE CO., LTD, "Tospearl 120") were added to obtain a solid mixture of methyl silicone particles / silicone resin (in terms of polycondensation compound) The component mass standard was set to 80 / 20, and the mixture was dispersed with a homogenizer to obtain a methyl silicone particle-dispersed silicone resin solution. Here, "co...

Embodiment 2

[0115] An organic electroluminescent element was obtained under the same conditions as in Example 1 except that the thickness of the electron transport layer 9 was set to 235 nm.

Embodiment 3

[0117] An organic electroluminescent element was obtained under the same conditions as in Example 1 except that the thickness of the electron transport layer 9 was set to 350 nm.

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Abstract

Provided is an organic electroluminescence element wherein the light-reflecting electrode is separated by the distance d, which is specified by the following formula (1), from the light-emitting point of the light-emitting layer, where lambda is the wavelength of specified light radiated from the light-emitting layer. n is the refractive index at wavelength lambda of the layer disposed between the light-emitting point of the light-emitting layer and the light-reflecting electrode. n1 and k1 are the refractive index and extinction coefficient of light having wavelength lambda in the layer that contacts the light-reflecting electrode. n2 and k2 are the refractive index and extinction coefficient at wavelength lambda of the light-reflecting electrode. m is 0 or 1. a satisfies the following formula when m is 0 or 1. -1.17norg / nEML+1.94a-0.16norg / nEML+2.33 0.28norg / nEML+0.75a2.85norg / nEML-1.23 norg is the refractive index at wavelength lambda of the layer that contacts the light-emitting layer on the light-reflecting electrode side. nEML is the refractive index at wavelength lambda of the light-emitting layer.

Description

technical field [0001] The invention relates to an organic electroluminescent element, which can be used in lighting sources, backlight sources for liquid crystal displays, flat panel displays and the like. Specifically, it relates to an organic electroluminescent element exhibiting particularly excellent light emitting characteristics when a light-scattering region is provided on the outer surface of a light-transmitting substrate constituting the organic electroluminescent element through appropriate optical design. Background technique [0002] Image 6 An example of the structure of an organic electroluminescence element is shown. This organic electroluminescence element has a light-transmitting substrate 6, a light-transmitting electrode 1 serving as an anode, a hole-transporting layer 8, a light-emitting layer 3, an electron-transporting layer 9, and a light-reflecting electrode 2 serving as a cathode. On the upper surface of the light-transmitting substrate 6, a ligh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/50H05B33/02H05B33/26
CPCH01L2251/558H01L51/5268H01L51/5271H01L51/5262H10K50/85H10K50/854H10K50/856H10K2102/351
Inventor 山名正人中村将启
Owner PANASONIC CORP
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