US 12,480,040 B2
Display substrate and display apparatus
Lei Chen, Beijing (CN)
Assigned to Beijing BOE Technology Development Co., Ltd., Beijing (CN)
Appl. No. 17/628,553
Filed by BOE Technology Group Co., Ltd., Beijing (CN)
PCT Filed Mar. 31, 2021, PCT No. PCT/CN2021/084460
§ 371(c)(1), (2) Date Jan. 19, 2022,
PCT Pub. No. WO2022/205090, PCT Pub. Date Oct. 6, 2022.
Prior Publication US 2023/0263052 A1, Aug. 17, 2023
Int. Cl. C09K 11/06 (2006.01); H10K 50/18 (2023.01); H10K 50/85 (2023.01); H10K 59/80 (2023.01); H10K 85/00 (2023.01); H10K 85/60 (2023.01); H10K 101/40 (2023.01)
CPC C09K 11/06 (2013.01) [H10K 50/18 (2023.02); H10K 85/00 (2023.02); H10K 85/615 (2023.02); H10K 85/636 (2023.02); H10K 85/654 (2023.02); C09K 2211/1018 (2013.01); H10K 50/85 (2023.02); H10K 59/875 (2023.02); H10K 85/6574 (2023.02); H10K 85/6576 (2023.02); H10K 2101/40 (2023.02)] 12 Claims
OG exemplary drawing
 
1. A display substrate comprising a drive circuit layer and a light emitting structure layer stacked on a substrate, wherein the light emitting structure layer comprises an anode, a cathode, and an emitting layer, a hole block layer, and an electron transport layer disposed between the anode and the cathode; the hole block layer and the electron transport layer satisfy:
EETL/EHBL>1;
where EETL is the electromigration rate of the electron transport layer, and EHBL is the electromigration rate of the hole block layer;
wherein the material of the hole block layer comprises one or more of a compound having the following structural formula:

OG Complex Work Unit Chemistry