An organic electroluminescence device, its preparation method, and display device
An electroluminescence device and luminescence technology, which is applied in the direction of electric solid-state devices, semiconductor/solid-state device manufacturing, electrical components, etc., can solve the problems of frequent use of fine metal masks, increased process difficulty and production costs, etc., to achieve The effect of reducing production and use times, shortening production time, and reducing production costs
Active Publication Date: 2020-08-11
WUHAN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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Problems solved by technology
However, in order to obtain the first light-emitting layer and the second light-emitting layer with different area ratios, when evaporating the second light-emitting layer, it is still necessary to use fine metal masks (FMM) with different hole sizes for multiple evaporations. Fine metal masks are used more frequently, which increases the difficulty of the process and the production cost
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[0028] The following descriptions of the various embodiments refer to the accompanying drawings to illustrate specific embodiments that the present application can be used to implement. The directional terms mentioned in this application, such as [top], [bottom], [front], [back], [left], [right], [inside], [outside], [side], etc., are for reference only The orientation of the attached schema. Therefore, the directional terms used are used to illustrate and understand the application, but not to limit the application. In the figures, structurally similar elements are denoted by the same reference numerals.
[0029] This application is aimed at the preparation method of organic electroluminescent devices in the prior art, and there are many times of using fine metal masks with different opening sizes, which increases the technical problems of process difficulty and production cost. This embodiment can solve this problem. defect.
[0030] In the mixed light application scenari...
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The present application provides an organic electroluminescent device and its preparation method, and a display device, which can be used to realize mixed light emission. The method includes the following steps: firstly, an array substrate is provided, and a first organic common light is formed in the pixel area of the array substrate. layer and the first light-emitting layer; then align the fine metal mask with the array substrate, and determine the opening area of different organic light-emitting material layers by adjusting the distance between the fine metal mask and the array substrate, The area of the opening is proportional to the distance between the fine metal mask plate and the array substrate; then at least a second light-emitting layer is formed on the first light-emitting layer; The problem of fine metal masks with different aperture sizes.
Description
technical field [0001] The present application relates to the field of display manufacturing, in particular to an organic electroluminescence device, a preparation method thereof, and a display device. Background technique [0002] In the mixed light application scenario where it is necessary to use a variety of organic light-emitting materials to mix light to obtain the desired color, the prior art usually uses light-emitting materials whose mobility of the first carrier is greater than that of the second carrier. materials, by changing the area ratio of the second light-emitting layer to the first light-emitting layer, mixed light of different colors can be obtained. However, in order to obtain the first light-emitting layer and the second light-emitting layer with different area ratios, when evaporating the second light-emitting layer, it is still necessary to use fine metal masks (FMM) with different hole sizes for multiple evaporations. Fine metal mask plates are used ...
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IPC IPC(8): H01L27/32H01L51/56
CPCH10K59/122H10K71/166H10K71/00
Inventor 向明
Owner WUHAN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD