	US 12,477,946 B2
	Composition, OLED device and OLED display panel
Hu Wang, Jiangsu (CN); Wei Zhao, Jiangsu (CN); Mengzhen Li, Jiangsu (CN); Jin Xu, Jiangsu (CN); Fangyi Cao, Jiangsu (CN); Bin Liu, Jiangsu (CN); and Xiaokang Zhou, Jiangsu (CN)
Assigned to KunShan Go-Visionox Opto-Electronics Co., Ltd, Kunshan (CN)
Filed by KunShan Go-Visionox Opto-Electronics Co., Ltd, Kunshan (CN)
Filed on Dec. 30, 2021, as Appl. No. 17/566,231.
Application 17/566,231 is a continuation of application No. PCT/CN2020/104069, filed on Jul. 24, 2020.
Claims priority of application No. 201911200961.6 (CN), filed on Nov. 29, 2019.
Prior Publication US 2022/0123232 A1, Apr. 21, 2022
Int. Cl. H01L 51/50 (2006.01); H10K 85/30 (2023.01); H10K 85/60 (2023.01); H10K 50/16 (2023.01)

CPC H10K 85/6572 (2023.02) [H10K 85/324 (2023.02); H10K 85/654 (2023.02); H10K 85/6565 (2023.02); H10K 50/16 (2023.02)]

18 Claims

1. A composition for an electron transport layer of an organic electroluminescent OLED device, the composition comprising: a low-mobility metal complex material of bias-electron-transport-type in a mass percentage of 1% to 99% and an organic electron transport material in a mass percentage of 1% to 99%, wherein an electron mobility of the low-mobility metal complex material of bias-electron-transport-type is less than 1*E⁻⁷cm²/Vs; wherein the low-mobility metal complex material of bias-electron-transport-type comprises a complex material, and wherein the complex material comprises any one of a carbonic acid group, a trimethylacetic acid group, an oxalic acid group, a phenolic acid group and a fluoride group or a derivative thereof.

12. An OLED device, comprising: an anode layer, a cathode layer, a hole injection layer, a hole transport layer, an electron blocking layer, a light emitting layer, a hole blocking layer, an electron transport layer and an electron injection layer which are sequentially stacked along a direction from the anode layer to the cathode layer; wherein the electron transport layer comprises a low-mobility metal complex material of bias-electron-transport-type in a mass percentage of 1% to 99% and an organic electron transport material in a mass percentage of 1% to 99%, wherein an electron mobility of the low-mobility metal complex material of bias-electron-transport-type is less than 1*E⁻⁷cm²/Vs; wherein the low-mobility metal complex material of bias-electron-transport-type comprises any one of a carbonic acid group, a trimethylacetic acid group, an oxalic acid group, a phenolic acid group and a fluoride group or a derivative thereof.