Organic light-emitting diode (OLED) composite transparent cathode structure and preparation method thereof

Abstract

The invention relates to the technical field of organic light-emitting diode (OLED) luminescence, and discloses an OLED composite transparent cathode structure to solve the problem that the brightness cannot meet requirements because the electrical conductivity or the transmittance of a transparent cathode structure or a composite transparent cathode structure in the prior art is not good. The key point of the technical scheme is that the OLED composite transparent cathode structure comprises a transparent cathode layer and an auxiliary transparent cathode layer, wherein the auxiliary transparent cathode layer is positioned above the transparent cathode layer; and the transparent cathode layer is made of a Al-Li alloy material, and the auxiliary transparent cathode layer is made of an Ag material. Moreover, the invention also discloses a preparation method for the OLED composite transparent cathode structure. The OLED composite transparent cathode structure is suitable for preparing high-brightness top-emission active matrix / organic light-emitting diode (AMOLED) devices.

Description

technical field [0001] The invention relates to the technical field of OLED light emission, in particular to an OLED composite transparent cathode structure and a preparation method thereof. Background technique [0002] Top-emitting AMOLED (passive organic electroluminescent diode) can effectively solve the problems of reduced aperture ratio and display brightness reduction caused by complex TFT (thin film field effect tube) compensation circuits. The microcavity effect can also improve the display color gamut of the AMOLED display and improve the display effect. [0003] As the top-emitting AMOLED light must be transmitted, the transparent cathode has a crucial impact on the performance of the top-emitting AMOLED device. Transmittance and conductivity are important factors that must be considered for the transparent cathode. Commonly used cathode materials such as Al, Mg-Ag ( Magnesium-silver alloy), Ag, Ca, etc. have good light penetration characteristics only when the t...

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is: to propose a compound transparent cathode structure of OLED to solve the problem that the brightness cannot meet the requirements due to the poor conductivity or light transmittance of the transparent cathode structure or the compound transparent cathode structure in the traditional technology; In addition, the invention also proposes a method for preparing the composite transparent cathode structure of the OLED

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