Preparation method of light-emitting layer and display device

Abstract

The invention provides a preparation method of a light-emitting layer and a display device. The preparation method of the light-emitting layer includes S1, providing a substrate, S2, evaporating a green light-emitting layer on the substrate, S3, destroying the green light-emitting layer on the left side and the middle area with UV light, S4, removing the green light-emitting layer from the substrate Evaporating the red light-emitting layer, S5, destroying the red light-emitting layer in the leftmost region with UV light, S6, vapor-depositing the blue light-emitting layer on the substrate, S7, performing an electron transport layer on the substrate, Evaporating the electron injection layer and cathode, and encapsulating, S8, subjecting the device packaged in step S7 to a voltage-on treatment, and destroying the blue light-emitting layer in the middle area, and the red light-emitting layer and the blue light-emitting layer in the right area . The RGB light-emitting layer is processed through two UV light irradiations and voltage application, and an OLED light-emitting device that does not need color filters and metal mask evaporation devices is realized.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a method for preparing a light-emitting layer and a display device. Background technique [0002] Display panels, such as Organic Light-Emitting Diode (OLED for short), have attracted great attention from academia and industry because of their great development potential in the direction of solid-state lighting and flat panel display. [0003] The current commercialized OLED light-emitting panel, in terms of large size, usually has a multi-stacked light-emitting layer structure to achieve full color through a color filter (CF for short). The small-sized OLED light-emitting panel uses a fine metal mask (Finemetal mask, FMM for short) technology to evaporate RGB materials. The fine mask sheet is thin (10-100μm), the minimum opening size is about 20μm, the positioning accuracy is about 3μm, and the processing accuracy is high. In addition, as the size of the FMM increases, the mi...

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Problems solved by technology

[0005] The invention provides a method for preparing a luminescent layer and a display device. The RGB luminescent layer can be processed by twice UV light irradiation and voltage application, so as to realize the preparation of evaporation devices without color filters and metal masks, so as to solve the problem of In the prior art, when metal masks are used to prepare OLED devices, large-scale metal masks are not easy to prepare, and the cost is very high, and the metal masks need to be cleaned regularly after evaporation several times, otherwise it is easy to block the problem

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