Array substrate, organic electroluminescence display panel, and display device

Abstract

The invention discloses an array substrate, an organic electroluminescence display panel, and a display device. The array substrate comprises a lining substrate, an organic electroluminescence structure located on the lining substrate, and a film packaging layer covering the organic electroluminescence structure. The array substrate also comprises an absorption layer which is disposed above the film packaging layer and used for absorbing moisture. The array substrate provided by the embodiment of the invention employs the absorption layer to absorb moisture and oxygen in the air, prevents the moisture and oxygen from entering into the organic electroluminescence structure, effectively protects the organic electroluminescence structure, and prolongs the service life of the organic electroluminescence structure.

Description

technical field [0001] The invention relates to the field of display technology, in particular to an array substrate, an organic electroluminescence display panel and a display device. Background technique [0002] At present, organic electroluminescent display devices (Organic Electroluminescent Display, OLED) have gradually become the mainstream in the display field due to their excellent performances such as low power consumption, high color saturation, wide viewing angle, thin thickness, and flexibility. The service life of existing OLED devices exceeds 10,000 hours, and the storage life exceeds 50,000 hours. However, compared with liquid crystal displays and plasma displays, the relatively short service life is still one of the important factors restricting the commercialization of OLEDs. [0003] Compositions such as water vapor and oxygen in the air have a great impact on the life of OLEDs. The reasons are mainly considered from the following aspects: First, when OLED...

AI Technical Summary

Problems solved by technology

The service life of existing OLED devices exceeds 10,000 hours, and the storage life exceeds 50,000 hours. However, compared with liquid crystal displays and plasma displays, the relatively short service life is still one of the important factors restricting the commercialization of OLEDs.

[0003] Compositions such as water vapor and oxygen in the air have a great impact on the life of OLEDs. The reasons are mainly considered from the following aspects: First, when OLED devices work, electrons are injected from the cathode, which requires that the cathode work function be as low as possible. These metal materials such as aluminum, magnesium, calcium, etc., generally have relatively active chemical properties, and are easily corroded in the air or other environments containing oxygen, especially in environments containing water vapor, electrochemical corrosion is more likely to occur; Secondly, oxygen and water vapor will also chemically react with organic functional layers in OLEDs, such as the light-emitting layer, hole transport layer, and electron transport layer, and these reactions will cause OLED devices to fail

[0004] In order to separate the functional layers of the OLED device from the water vapor, oxygen and other components in the atmosphere, thereby prolonging the life of the device, such as figure 1 As shown, a layer of thin film encapsulation layer 02 is generally covered above the OLED device 01, and the manufacturing process of the thin film encapsulation layer 02 in the prior art may include inorganic film encapsulation, organic film encapsulation, inorganic-organic film composite encapsulation, etc. All kinds of processes inevitably have film defects, such as vacancies, layer defects, impurities, etc., which have poor barrier ability to water vapor and oxygen, and are easy to pass through by oxygen and water vapor, which will affect the life of OLED devices.

Images