Display panel and display device

Abstract

The present application relates to a display panel and a display device. The display panel includes a substrate, an organic luminescent layer, a light extraction layer and a thin film encapsulation layer which are sequentially stacked. Wherein the light extraction layer includes a first light extraction layer, an isolation layer and a second light extraction layer which are sequentially stacked from the surface of the organic light-emitting layer outward. In the present application, a structure in which the isolation layer is interposed between the first light extraction layer and the second light extraction layer is adopted. During the preparation of the display panel, the light extraction layer is divided into two vapor depositions, the first light extraction layer is evaporated first, and then the isolation layer is evaporated. The isolation layer is only used as a protective layer to reduce the damage of the display panel to the display device by the strong oxidant in the subsequent thin-film packaging, so as to ensure the effect of thin-film packaging. At the same time, the arrangement of the first light extraction layer and the second light extraction layer makes the manufactured display device have higher light extraction efficiency.

Description

technical field [0001] The present application relates to the technical field of optoelectronic devices, in particular to a display panel and a display device. Background technique [0002] With the continuous development of display technology, OLED (Organic Light Emitting Diode) has increasingly become an international research hotspot due to its advantages of high luminance, rich colors, low-voltage DC drive, and simple preparation process. OLED has a wider field of view and can be made into larger-sized products to meet users' requirements for different sizes. The above-mentioned outstanding advantages determine that OLED will become the mainstream of next-generation display technology. On the other hand, due to its many advantages such as thin thickness, light weight, bendability and even rollability, flexible display must be one of the trends of display technology, and the future market prospect is broad. [0003] In the manufacturing process of flexible display OLED ...

AI Technical Summary

Problems solved by technology

In the traditional technical solution, a layer of LiF can be evaporated on the light extraction layer to reduce the chemical reaction between the strong oxidizing material and the electron injection layer and cathode of the OLED device during the subsequent thin-film packaging process of the OLED device, thereby affecting the OLED device. life

However, since the refractive index of LiF material is about 1.4, it is not conducive to the light extraction of OLED devices, which reduces the luminous efficiency of OLED devices.

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