organic electroluminescent device

Abstract

The present application discloses an organic electroluminescent device, comprising: a base substrate; an electroluminescent structure disposed on the base substrate, where the electroluminescent structure is located in a display area; at least one retaining wall disposed on the base substrate, At least one retaining wall is arranged in the non-display area, and the retaining wall is arranged around the display area; at least one retaining wall is arranged in sequence along a direction away from the display area, and the retaining wall includes a first retaining wall adjacent to the display area; the first retaining wall includes At least one stacked structure, the stacked structure includes an organophilic material layer and an organic-phobic material layer, the organic-phobic material layer is arranged on the side of the organic-friendly material layer away from the substrate; the thin film encapsulation layer includes an organic film layer and an inorganic film layer, and the organic The film layer is arranged in the space formed by the first retaining wall surrounding the display area, and the inorganic film layer is arranged on the surface of the organic film layer away from the electroluminescence structure. With such a solution, the organic film layer forms a good boundary, and the thickness at the boundary of the organic film layer is effectively controlled.

Description

technical field [0001] The present application relates to the field of display technology, in particular to an organic electroluminescent device. Background technique [0002] In recent years, Organic Light-Emitting Diode (OLED, Organic Light-Emitting Diode) has become a very advanced display industry at home and abroad. , fast response time, high luminous efficiency, thin panel thickness, large-size and bendable panels can be produced, simple manufacturing process, and low cost. [0003] OLED devices generally use active metals as cathodes, which are easy to react with water vapor and affect charge injection, and the organic light-emitting materials in the device will also chemically react with water and oxygen. These reactions reduce the performance and service life of OLED devices. Therefore, OLED devices need to use good packaging technology to isolate the intrusion of water vapor and oxygen. [0004] Thin Film Encapsulation (Thin Film Encapsulation) is a packaging met...

AI Technical Summary

Problems solved by technology

The organic layer in the encapsulation layer structure is generally completed by inkjet printing, but due to the accuracy of the positioning of the print head and the influence of the volume of ink droplets ejected from each nozzle on the print head, the boundary position of the organic layer is difficult to achieve the ideal situation

If the amount of inkjet used to print the organic layer is too large, it will cause inkjet overflow to overflow the boundary of the organic layer. If the amount of inkjet used is too small, it will affect the film forming process, and it is easy to produce small holes and affect the film quality.

In the existing thin film packaging technology, the edge end of the organic film layer cannot form a good boundary, and the film thickness is abnormal, which affects the packaging effect and stress matching of the packaging layer, especially when it is bent, it is easy to cause display loss

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