US 11,737,296 B2
OLED display device, display panel and manufacturing method of OLED display device
Xueqin Chen, Beijing (CN)
Assigned to BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN)
Appl. No. 16/767,859
Filed by BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN)
PCT Filed Dec. 23, 2019, PCT No. PCT/CN2019/127349
§ 371(c)(1), (2) Date May 28, 2020,
PCT Pub. No. WO2020/143438, PCT Pub. Date Jul. 16, 2020.
Claims priority of application No. 201910023399.8 (CN), filed on Jan. 10, 2019.
Prior Publication US 2021/0249621 A1, Aug. 12, 2021
Int. Cl. H01L 51/50 (2006.01); H10K 50/12 (2023.01); H10K 71/00 (2023.01); H10K 71/16 (2023.01); H10K 85/60 (2023.01); H10K 50/18 (2023.01)
CPC H10K 50/121 (2023.02) [H10K 71/00 (2023.02); H10K 71/164 (2023.02); H10K 50/12 (2023.02); H10K 50/181 (2023.02); H10K 85/615 (2023.02); H10K 85/622 (2023.02)] 9 Claims
OG exemplary drawing
 
1. An OLED display device, comprising: a base substrate, and an anode, a hole transport layer, an electron blocking layer, a light-emitting layer, a hole blocking layer, an electron transport layer and a cathode which are sequentially arranged along a direction departing from the base substrate,
wherein a material of the light-emitting layer comprises a host light-emitting material and a carrier balance material doped in the host light-emitting material; and
the carrier balance material is used for balancing an electron mobility and a hole mobility of the light-emitting layer, and wherein
the host light-emitting material is a blue organic light-emitting material;
a doping concentration of the carrier balance material in the host light-emitting material is gradually changed in a thickness direction of the light-emitting layer; and
the carrier balance material comprises an electron blocking material.