Pixel unit, manufacturing method thereof and display device

Abstract

The invention discloses a pixel unit, a manufacturing method thereof and a display device. The pixel unit comprises an anode layer, a pixel definition layer, an organic light-emitting layer and a cathode layer. The anode layer comprises a plurality of pixel anodes distributed in an array mode. The pixel definition layer is located on the anode layer and comprises a plurality of pixel definition units arranged at an interval. The pixel definition units correspond to the pixel anodes in a one-to-one mode. Each pixel definition unit defines a light-emitting area on the corresponding pixel anode. The organic light-emitting layer is located in the light-emitting areas, and the cathode layer is located on the organic light-emitting layer. By improving the structure of the pixel unit, the light extraction efficiency is greatly improved.

Description

technical field

[0001] The present invention relates to the field of display technology, in particular to a pixel unit and a manufacturing method thereof. Background technique

[0002] The basic structure of organic electroluminescence (Organic Light-Emitting Diode, OLED) device is a thin and transparent indium tin oxide (ITO) with semiconducting properties, connected to the positive electrode of electricity, plus another metal cathode, including into a sandwich structure. The whole structural layer includes: hole transport layer (HTL), light emitting layer (EL) and electron transport layer (ETL). When the power is supplied to an appropriate voltage, the positive holes and the negative charges will combine in the light-emitting layer to produce light, and the three primary colors of red, green and blue RGB will be produced according to their formulas to form the basic colors.

[0003] In general, the external quantum efficiency of an OLED depends on its internal quantum ef...

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