Waterproof anti-reflection flexible OLED device and preparation method thereof

Abstract

The invention relates to an OLED device and a preparation method thereof. The OLED device is composed of an OLED device, a device encapsulation layer, an upper flexible substrate, and a lower flexible substrate. Besides, an anti-reflection layer is arranged at the outer side of the upper flexible substrate; inorganic nanometer particles are deposited on the surface of the anti-reflection layer. According to the invention, the inorganic nanometer particles with high light transmittance and low absorptivity are selected to be scattered in an organic material with high light transmittance and moderate refractive index; and because of a formed optical transition layer, the anti-reflection effect can be improved by 20% to 50%. Moreover, a concave-convex micro structure is formed on the surface of the organic main body and the inorganic nanometer particles cover the micro structure, so that a bonding force of the organic main body and the inorganic nanometer particles is provided and the waterproof effect is also realized. According to the technical scheme, the OLED device has the waterproof and anti-reflection effect and the overall thickness is low.

Description

technical field [0001] The invention relates to a waterproof and anti-reflection flexible OLED device and a preparation method thereof, belonging to the technical field of flexible OLED displays. Background technique [0002] OLED (organic electroluminescent) display device includes substrate, anode, organic film layer, cathode, encapsulation layer and encapsulation cover plate; The advantages of fast response speed, low energy consumption, low driving voltage, wide operating temperature range, simple production process, high luminous efficiency and flexible display, as well as bright application prospects, have attracted great attention from the industry and the scientific community. [0003] Due to the difference in refractive index between the layers of the OLED, when the light passes through these interfaces, total reflection loss will occur, so that the photons finally emitted from the glass surface only account for 20% of the total number of photons, which will bring t...

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Problems solved by technology

[0003] Due to the difference in refractive index between the layers of the OLED, when the light passes through these interfaces, total reflection loss will occur, so that the photons finally emitted from the glass surface only account for 20% of the total number of photons, which will bring the following problems: (1 ) The low light output rate makes it necessary to use high-grade luminescent materials to increase the input current to meet the use requirements of brightness, thereby increasing the cost and shortening the service life; (2) the energy that cannot be taken out (nearly 80%) will be converted into For heat, the temperature of the organic functional layer increases, which not only deteriorates the stability and photoelectric parameter performance of the OLED, but also shortens the life of the OLED; (3) In order to eliminate the influence of heat on the life and performance of the OLED, a heat dissipation device must be installed, which It will increase the production cost, so it is necessary to design and improve OLED devices to increase the light extraction rate

However, the design structure with both waterproof and anti-reflection effects will increase the overall thickness of the OLED device

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