US 11,895,855 B2
Light-emitting device
YongChurl Kim, Seoul (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Gyeonggi-Do (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed on Aug. 27, 2020, as Appl. No. 17/004,540.
Claims priority of application No. 10-2019-0106641 (KR), filed on Aug. 29, 2019; and application No. 10-2020-0069843 (KR), filed on Jun. 9, 2020.
Prior Publication US 2021/0066635 A1, Mar. 4, 2021
Int. Cl. H01L 29/78 (2006.01); H10K 50/11 (2023.01); C07F 7/24 (2006.01); C09K 11/06 (2006.01); H10K 50/13 (2023.01); H10K 85/30 (2023.01); H10K 50/15 (2023.01); H10K 50/16 (2023.01); H10K 101/40 (2023.01)
CPC H10K 50/11 (2023.02) [C07F 7/24 (2013.01); C09K 11/06 (2013.01); H10K 50/131 (2023.02); H10K 85/30 (2023.02); C09K 2211/10 (2013.01); C09K 2211/188 (2013.01); H10K 50/15 (2023.02); H10K 50/16 (2023.02); H10K 2101/40 (2023.02)] 19 Claims
OG exemplary drawing
 
1. A light-emitting device comprising:
a first electrode;
a second electrode facing the first electrode;
an emission layer disposed between the first electrode and the second electrode; and
a first charge transport layer disposed between the first electrode and the emission layer,
a second charge transport layer disposed between the emission layer and the second electrode,
wherein a band gap energy of the emission layer and a band gap energy of the first charge transport layer are different from each other,
wherein the band gap energy of the emission layer and a band gap energy of the second charge transport layer are different from each other,
the emission layer comprises a first perovskite compound, wherein the first perovskite compound and the second perovskite compound are different from each other; and
the first charge transport layer comprises a second perovskite compound,
wherein the band gap energy of the emission layer is less than the band gap energy of the first charge transport layer.