OLED display panel and preparation method thereof

Abstract

The invention provides a preparation method of an OLED display panel, and the method comprises the steps: S1, providing a substrate which comprises TFT devices arranged in an array, arranging anodes on the substrate in an array, and electrically connecting the anodes with the TFT devices; arranging an auxiliary layer on the anode; s2, forming a pixel definition layer on the substrate, wherein the anode and the auxiliary layer are arranged in a pixel opening of the pixel definition layer; s3, removing the auxiliary layer in the pixel opening and dust particles falling on the auxiliary layer by mistake, and then preparing a luminescent material layer and a cathode layer in the pixel opening; due to the fact that the risk that the organic matter particles on the surface of the anode are polluted in the manufacturing process is reduced, the risk that the cathode and the anode are short-circuited in the OLED device is avoided, the probability of dark spots and vanishing spots is reduced, and the display quality of the display panel is improved.

Description

technical field [0001] The invention relates to the field of display technology, in particular to an OLED display panel and a preparation method thereof. Background technique [0002] Organic Light Emitting Display (OLED) has self-illumination, low driving voltage, high luminous efficiency, short response time, high definition and contrast, nearly 180° viewing angle, wide operating temperature range, and can realize flexible display and With many advantages such as large-area full-color display, it is recognized by the industry as a display device with the most potential for development. [0003] An OLED display panel generally includes: a substrate, an anode disposed on the substrate, a hole injection layer disposed on the anode, a hole transport layer disposed on the hole injection layer, a light-emitting layer disposed on the hole transport layer, a device An electron transport layer on the light emitting layer, an electron injection layer on the electron transport layer...

AI Technical Summary

Problems solved by technology

[0005] Based on the existing technical problems, the present application provides an OLED display panel and its preparation method, which can solve the problem that the pixel definition layer in the prior art is the ink drop of hydrophobic material solution falling onto the anode, and the remaining Organic particles will cause a short circuit between the cathode and the anode on the surface, initially appearing as small black spots, and later will form a technical problem of vanishing points

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