US 11,706,935 B2
Electroluminescent device comprising a target film comprising a small molecular layer and a large molecular layer and method for fabricating the same, display panel and display device
Wenjun Hou, Beijing (CN)
Assigned to BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN)
Appl. No. 16/620,849
Filed by BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN)
PCT Filed Mar. 8, 2019, PCT No. PCT/CN2019/077472
§ 371(c)(1), (2) Date Dec. 9, 2019,
PCT Pub. No. WO2019/214335, PCT Pub. Date Nov. 14, 2019.
Claims priority of application No. 201810448037.9 (CN), filed on May 11, 2018.
Prior Publication US 2020/0119300 A1, Apr. 16, 2020
Int. Cl. H01L 51/50 (2006.01); H10K 50/15 (2023.01); H10K 50/11 (2023.01); H10K 50/16 (2023.01); H10K 50/17 (2023.01); H10K 101/40 (2023.01); H10K 101/30 (2023.01)
CPC H10K 50/11 (2023.02) [H10K 50/15 (2023.02); H10K 50/156 (2023.02); H10K 50/16 (2023.02); H10K 50/171 (2023.02); H10K 2101/30 (2023.02); H10K 2101/40 (2023.02)] 11 Claims
OG exemplary drawing
 
1. An electroluminescent device, comprising a hole inject layer, a hole transport layer, an electroluminescent layer, an electron transport layer, and an electron inject layer,
wherein at least one of the hole inject layer, the hole transport layer, the electron transport layer, and the electron inject layer is a target film comprising a small molecular layer with a small molecule and a large molecular layer with a large molecule which are arranged in a stacked manner, and
wherein the large molecular layer of the target film is closer to the electroluminescent layer than the small molecular layer of the target film, and the large molecular layer has a cross-linked network structure
wherein a relative molecular mass of the large molecule of the large molecular layer ranges from several thousands to several millions, and a relative molecular mass of the small molecule of the small molecular layer is smaller than five hundreds, and
wherein the small molecular layer has a thickness larger than that of the large molecular layer.
 
10. A method for fabricating an electroluminescent device, comprising:
forming an electroluminescent device on a substrate, wherein the electroluminescent device comprises a hole inject layer, a hole transport layer, an electroluminescent layer, an electron transport layer, and an electron inject layer,
wherein at least one of the hole inject layer, the hole transport layer, the electron transport layer, and the electron inject layer is a target film comprising a small molecular layer with a small molecule and a large molecular layer with a large molecule which are arranged in a stacked manner, and
wherein the large molecular layer of the target film is closer to the electroluminescent layer than the small molecular layer of the target film, and the large molecular layer has a cross-linked network structure,
wherein a relative molecular mass of the large molecule of the large molecular layer ranges from several thousands to several millions, and a relative molecular mass of the small molecule of the small molecular layer is smaller than five hundreds, and
wherein the small molecular layer has a thickness larger than that of the large molecular layer.