Organic electroluminescence display device with high light extraction rate and preparation method thereof
A technology for electroluminescence display and extraction rate, which is applied in the fields of electric solid-state devices, semiconductor/solid-state device manufacturing, electrical components, etc., can solve the problems of lowering the contrast ratio of OLED display devices, and achieves high light extraction efficiency, simple manufacturing process, and high production efficiency. precise effect
Active Publication Date: 2016-05-25
GUAN YEOLIGHT TECH CO LTD +1
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Problems solved by technology
[0006] The technical problem to be solved by the present invention is the problem that the contrast ratio of the OLED display device is reduced due to light beam scattering in the OLED device with a scattering layer between the transparent substrate and the first transparent electrode in the prior art, so as to provide an OLED device that does not reduce the contrast ratio of the OLED display device. Organic electroluminescent display device with high light extraction rate and manufacturing method thereof
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[0038] In order to make the purpose, technical solution and advantages of the present invention clearer, the following will further describe in detail the embodiments of the present invention in conjunction with the accompanying drawings.
[0039] as attached figure 2 As shown, it is an organic electroluminescent display device with high light extraction rate according to an embodiment of the present invention, including a transparent glass substrate 1, a transparent ITO electrode layer 3, an organic functional layer 4, and an Al electrode layer 5. The organic functional layer Layer 4 includes several pixel units, and also includes a scattering layer 2 arranged between the transparent glass substrate 1 and the transparent ITO electrode layer 3 in each pixel unit area, and the scattering layer 2 is only distributed in the pixel unit In the region, throughout the transparent glass substrate 1, a plurality of said scattering layers 2 are discontinuously distributed, wherein said...
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The invention provides an organic light emitting display device with a high light extraction rate and a preparation method of the organic light emitting display device. The organic light emitting display device comprises transparent substrates, first transparent electrodes, organic functional layers, second electrodes, and a scattering layer which is corresponding to each pixel unit region and arranged between the transparent substrate and the first transparent electrode in each pixel unit region. The scattering layers are only distributed in the corresponding regions of pixel units. First transparent electrode layers with relatively low refractive index are distributed outside the scattering layers. After light beams reach the scattering layers from light-emitting pixels, light beam transverse diffusion from the scattering layers with high refractive index to the first transparent electrodes with low refractive index is inhibited due to discontinuity of the scattering layers so that contrast ratio of images is ensured, and the light extraction rate of the organic light emitting display device is enhanced.
Description
technical field [0001] The invention relates to the field of organic electroluminescent devices, in particular to an organic electroluminescent device including a high refractive index scattering layer and a preparation method thereof. Background technique [0002] OLED (full name in English is OrganicLightEmittingDevice, which means organic electroluminescent device, referred to as OLED) is a next-generation display technology, which has the advantages of wide color gamut, fast response, wide viewing angle, no pollution, high contrast, and planarization. [0003] A typical OLED device structure generally includes a transparent glass substrate, a first transparent electrode, a second electrode, and an organic functional layer arranged between the two electrodes. Due to the reflection caused by the matching of the refractive index of each layer material, the light emitting layer emits Light is largely confined within the device. For example, the refractive index of air is ap...
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IPC IPC(8): H01L27/32H01L21/77
Inventor 邱勇段炼董艳波张国辉
Owner GUAN YEOLIGHT TECH CO LTD