US 12,082,432 B2
Quantum dot light-emitting device, preparing method and display device
Jingwen Feng, Beijing (CN)
Assigned to BOE Technology Group Co., Ltd., Beijing (CN)
Appl. No. 17/436,035
Filed by BOE Technology Group Co., Ltd., Beijing (CN)
PCT Filed Feb. 25, 2021, PCT No. PCT/CN2021/077926
§ 371(c)(1), (2) Date Sep. 2, 2021,
PCT Pub. No. WO2021/170044, PCT Pub. Date Sep. 2, 2021.
Claims priority of application No. 202010125088.5 (CN), filed on Feb. 27, 2020.
Prior Publication US 2022/0006033 A1, Jan. 6, 2022
Int. Cl. H10K 50/115 (2023.01); H10K 71/00 (2023.01)
CPC H10K 50/115 (2023.02) [H10K 71/00 (2023.02)] 18 Claims
OG exemplary drawing
 
1. A quantum dot light-emitting device, comprising an anode, a hole transport layer, a quantum dot light-emitting layer, an electron transport layer and a cathode laminated one on another, wherein the quantum dot light-emitting layer comprises heterodimer quantum dots, the heterodimer quantum dots comprise first quantum dots carrying a positive charge and second quantum dots carrying a negative charge, and each first quantum dot and each second quantum dot have a same energy gap and different positions of conduction band and valence band;
wherein each first quantum dot in the quantum dot light-emitting layer carries a cationic surfactant, and each second quantum dot in the quantum dot light-emitting layer carries an anionic surfactant.