A kind of organic electroluminescence device and preparation method thereof
An electroluminescent device, organic technology, applied in the direction of electric solid devices, electrical components, semiconductor devices, etc., can solve the problems of forming dark spots, shorting anode and cathode, slowing down the progress of mass production, etc.
Active Publication Date: 2021-08-27
BOE TECH GRP CO LTD +1
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Problems solved by technology
However, in the cleaning process, the anode 5 is often directly blown up until the anode is bent and deformed due to excessive flushing pressure, and the serious anode lift will also burst the pixel defining layer 4 in contact with the anode, thereby causing the anode and the cathode to be disconnected. short circuit, forming a dark spot
The defect rate caused by HPMJ technology may reach nearly 50%, which seriously affects the improvement of yield rate and slows down the progress of mass production
Method used
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preparation example Construction
[0049] Corresponding to the above-mentioned equipment, the present invention also provides a method for preparing an organic electroluminescent device, which is used to prepare the above-mentioned organic electroluminescent device, the method comprising:
[0050] A pixel circuit layer, a flat layer, a pixel defining layer, and an anode layer are sequentially formed on the base substrate, and a pattern of the flat layer, a pixel defining layer, and an anode are formed through a patterning process, wherein:
[0051] In the pattern of the flat layer, the flat layer is provided with a plurality of openings facing away from the openings of the base substrate, a boss is formed between every two adjacent openings, and each of the pixel units has a the area facing the opening;
[0052] In the pattern of the pixel defining layer, the orthographic projection of the pixel defining layer on the base substrate is located within the orthographic projection of the boss on the base substrate;...
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The invention relates to the field of display technology, and discloses an organic electroluminescence device and a preparation method thereof, comprising a substrate substrate, a pixel circuit layer and a flat layer arranged in sequence on the substrate substrate, and formed on the flat layer away from the substrate. A pixel defining layer on one side of the base substrate for defining each pixel unit area, and anodes corresponding to the pixel units one-to-one; wherein: the flat layer is provided with a plurality of openings facing away from the base substrate, each A boss is formed between two adjacent openings, and each of the pixel units has an area directly opposite to the opening; in each of the pixel units, the anode in the pixel unit is formed on the convex The part on the stage that is opposite to the opening of the flat layer has a hollow structure. The flat layer has openings that can accept the anode loss caused by the anode, and the hollow structure of the anode avoids the occurrence of dark spots caused by the deformation of the anode caused by high-pressure washing, and improves the yield.
Description
technical field [0001] The invention relates to the field of display technology, in particular to an organic electroluminescent device and a preparation method thereof. Background technique [0002] The light-emitting principle of the active matrix organic light-emitting diode panel AMOLED is very similar to that of the light-emitting diode LED. After a voltage is applied to the cathode and anode of the material, movable electrons and holes are generated between the two electrodes. attached figure 1 It is a structural diagram of an active matrix organic light-emitting diode panel AMOLED in the prior art, and it includes: a substrate substrate 1, a pixel circuit layer 2, a flat layer 3, a pixel defining layer 4, and an anode in sequence from bottom to top 5; and a spacer layer 6 on the pixel defining layer 4. During the manufacturing process of the active matrix organic light-emitting diode panel AMOLED, high-pressure micro-jet cleaning HPMJ (HIGH PRESSURE MICRO JET) techno...
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IPC IPC(8): H01L27/32
CPCH10K59/00H10K59/121H10K59/122H10K59/12H10K59/1201
Inventor 张国苹彭利满张倩倩刘祺
Owner BOE TECH GRP CO LTD