US 11,758,746 B2
Electroluminescent device, and display device comprising thereof
Sujin Park, Seoul (KR); Yuho Won, Seoul (KR); Eun Joo Jang, Suwon-si (KR); Dae Young Chung, Suwon-si (KR); Sung Woo Kim, Hwaseong-si (KR); Jin A Kim, Suwon-si (KR); and Yong Seok Han, Anyang-si (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Gyeonggi-Do (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed on Aug. 22, 2022, as Appl. No. 17/892,564.
Application 17/892,564 is a continuation of application No. 17/062,162, filed on Oct. 2, 2020, granted, now 11,424,425.
Claims priority of application No. 10-2019-0123994 (KR), filed on Oct. 7, 2019.
Prior Publication US 2022/0399516 A1, Dec. 15, 2022
Int. Cl. H01L 51/50 (2006.01); H10K 50/115 (2023.01); H10K 50/15 (2023.01); H10K 85/10 (2023.01); H10K 50/16 (2023.01); H10K 71/15 (2023.01); H10K 102/00 (2023.01)
CPC H10K 50/115 (2023.02) [H10K 50/15 (2023.02); H10K 85/115 (2023.02); H10K 85/1135 (2023.02); H10K 50/16 (2023.02); H10K 71/15 (2023.02); H10K 2102/331 (2023.02); H10K 2102/351 (2023.02)] 20 Claims
OG exemplary drawing
 
1. An electroluminescent device, comprising
a first electrode and a second electrode which face each other;
a hole transport layer disposed between the first electrode and the second electrode;
a light emitting layer comprising:
a first light emitting layer disposed between the hole transport layer and the second electrode, the first light emitting layer comprising a first quantum dot, and
a second light emitting layer disposed between the first light emitting layer and the second electrode, the second light emitting layer comprising a second quantum dot; and
an electron transport layer disposed between the light emitting layer and the second electrode,
wherein each of the first light emitting layer and the second light emitting layer emits first light, and
hole transport capability per unit area and electron transport capability per unit area of the first quantum dot are greater than hole transport capability per unit area and electron transport capability per unit area of the second quantum dot, respectively.