Organic electroluminescence device and preparation method thereof

Abstract

The invention discloses an organic electroluminescence device, comprising a light-permeating substrate, reflecting layers, transparent electrode layers, an organic light emitting function layer and a semitransparent electrode layer which are sequentially overlapped, wherein the light-permeating substrate comprises a first light outgoing surface and a covered surface which are oppositely arranged, the reflecting layers dispersedly cover the covered surface to form shading areas, and the parts of the covered surface, which have been not covered by the reflecting layers, of the light-permeating substrate are formed into light-permeating areas; the transparent electrode layers cover the shading areas and the light-permeating areas; the organic light emitting function layer covers the surfaces of the transparent electrode layers; and the reflecting layers have rough surfaces for increasing diffuse reflection of light rays at the reflecting layers, and an area ratio of the reflecting layers to the transparent electrode layers is 20%-80%. The two light outgoing surfaces of the organic electroluminescence device are uniform and accordant in luminous intensity. According to the organic electroluminescence device, microcavity effect is weakened, and color rendering index is improved. In addition, the invention also discloses a preparation method of the organic electroluminescence device.

Description

technical field [0001] The invention relates to the field of light emitting devices, in particular to an organic electroluminescent device and a preparation method of the organic electroluminescent device. Background technique [0002] Organic Light Emission Diode (OLED) has the characteristics of high brightness, wide range of material selection, low driving voltage, full-cure active light emission, etc., and has the advantages of high definition, wide viewing angle, and fast response speed. A display technology and light source with great potential, in line with the development trend of mobile communication and information display in the information age, and the requirements of green lighting technology, is the focus of many researchers at home and abroad. [0003] Most of the existing organic electroluminescent technologies can only take out light from the anode or cathode side to produce bottom-emitting or top-emitting organic electroluminescent devices. The organic ele...

AI Technical Summary

Problems solved by technology

However, due to the use of a reflective layer and a semi-transparent electrode layer inside the organic electroluminescent device, it has a strong microcavity effect, resulting in a narrowed emission spectrum, which is not conducive to the color rendering index.

Images