US 11,818,908 B2
Thin film electroluminescent device, preparation method thereof, and electronic device
Xu Wang, Hubei (CN); Yue Zhang, Hubei (CN); Xianjie Li, Hubei (CN); Munjae Lee, Hubei (CN); Tao Li, Hubei (CN); Junyou Pan, Hubei (CN); Jiahui Tan, Hubei (CN); and Xi Yang, Hubei (CN)
Assigned to WUHAN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECHNOLOGY CO., LTD., Hubei (CN)
Appl. No. 16/971,058
Filed by WUHAN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECHNOLOGY CO., LTD., Hubei (CN); and GUANGZHOU CHINARAY OPTOELECTRONIC MATERIALS LTD., Guangdong (CN)
PCT Filed Sep. 29, 2019, PCT No. PCT/CN2019/108903
§ 371(c)(1), (2) Date Aug. 19, 2020,
PCT Pub. No. WO2021/003856, PCT Pub. Date Jan. 14, 2021.
Claims priority of application No. 201910603093.X (CN), filed on Jul. 5, 2019.
Prior Publication US 2021/0143355 A1, May 13, 2021
Int. Cl. H01L 51/00 (2006.01); H10K 50/12 (2023.01); H10K 50/15 (2023.01); H10K 50/16 (2023.01); H10K 50/17 (2023.01); H10K 71/00 (2023.01); H10K 85/60 (2023.01)
CPC H10K 50/12 (2023.02) [H10K 50/15 (2023.02); H10K 50/16 (2023.02); H10K 50/171 (2023.02); H10K 71/00 (2023.02); H10K 85/6572 (2023.02)] 9 Claims
OG exemplary drawing
 
1. A thin film electroluminescent device, comprising:
a first electrode;
a functional structural layer disposed on the first electrode;
a second electrode disposed on the functional structural layer; and
a cover layer disposed on a side of the second electrode away from the first electrode, wherein the cover layer comprises an ionic compound having a chemical formula of AX2, wherein A is selected from a divalent metal, and X is selected from halogen;
wherein the light emitting layer comprises a host material and a dopant material, the host material has the following structural formula:

OG Complex Work Unit Chemistry
the doping material has the following structural formula:

OG Complex Work Unit Chemistry
and
a mass ratio of the host material to the dopant material is 7:1: −9:1.