Manufacturing method of OLED display panel and OLED display panel

Abstract

The invention provides a manufacturing method of an OLED display panel and the OLED display panel. The method comprises the steps: providing an underlying substrate and forming multiple anodes arranged in an array on the substrate and auxiliary electrodes arranged in spaced regions of multipl anodes; forming a pixel definition layer on the underlying substrate, multiple anodes and auxiliary electrodes and forming multiple first openings corresponding to multiple anodes and second openings corresponding to the auxiliary electrodes on the pixel definition layer; forming an OLED light emitting layer covering the whole surface on the auxiliary electrodes, the pixel defining layer and multiple anodes; performing UV illumination on the OLED light emitting layer; and forming a cathode distributedon the whole surface on the OLED light emitting layer. The current conductivity of the electron transmission material in the OLED light emitting layer can be improved by the UV illumination treatment, the conduction obstacle between the auxiliary electrodes and the cathode can be eliminated and the improvement effect of the voltage drop can be improved.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a method for manufacturing an OLED display panel and the OLED display panel. 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] According to the driving method, OLED can be divided into two categories: passive matrix OLED (Passive Matrix OLED, PMOLED) and active matrix OLED (Active Matrix OLED, AMOLED), namely direct addressing and thin film transistor matrix addressing. Among them, AMOLED has pixels arranged in an array, belongs to the active display type, has high luminous efficiency,...

AI Technical Summary

Problems solved by technology

[0005] With the development of display technology, the size of the display panel is getting larger and larger, the size of the cathode of the OLED display panel is getting larger and larger, and the resistance of the cathode is also increasing accordingly, resulting in the voltage applied to the cathode being lower than the target value, resulting in a voltage For this reason, the prior art proposes a technical scheme of setting an auxiliary electrode on the same layer as the anode under the cathode, and connecting the cathode and the auxiliary electrode through an opening (Contact hole), which can effectively reduce the sheet resistance to improve the problem of voltage drop, but in practical application, after the opening is formed, an OLED light-emitting functional layer needs to be formed, and the OLED light-emitting functional layer including the electron transport layer is also deposited in the opening, and the cathode and auxiliary electrodes need to pass through Only the electron transport layer can be connected together, and the material impedance of the electron transport layer is high, so that the current passing through the opening is too small, resulting in obstacles to the conduction between the cathode and the auxiliary electrode, which affects the improvement effect of the voltage drop

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