US 12,193,253 B2
Light emitting device and display apparatus including the same
Jimyoung Ye, Suwon-si (KR); Seulong Kim, Cheonan-si (KR); Hyekyun Lee, Seoul (KR); Hajin Song, Hwaseong-si (KR); Jihwan Yoon, Yongin-si (KR); Dongseob Jeong, Suwon-si (KR); and Jaehoon Hwang, Seoul (KR)
Assigned to Samsung Display Co., Ltd., Yongin-si (KR)
Filed by Samsung Display Co., Ltd., Yongin-si (KR)
Filed on Jan. 13, 2022, as Appl. No. 17/575,583.
Claims priority of application No. 10-2021-0045692 (KR), filed on Apr. 8, 2021.
Prior Publication US 2022/0336766 A1, Oct. 20, 2022
Int. Cl. H10K 50/13 (2023.01); H10K 50/11 (2023.01); H10K 50/19 (2023.01); H10K 59/122 (2023.01); H10K 59/38 (2023.01); H10K 101/00 (2023.01); H10K 101/10 (2023.01)
CPC H10K 50/131 (2023.02) [H10K 50/11 (2023.02); H10K 50/19 (2023.02); H10K 59/122 (2023.02); H10K 59/38 (2023.02); H10K 2101/10 (2023.02); H10K 2101/90 (2023.02)] 20 Claims
OG exemplary drawing
 
1. A light emitting device, comprising:
a first electrode;
a hole transport region on the first electrode;
a first emission layer on the hole transport region, the first emission layer being to emit light of a first wavelength;
a second emission layer on the hole transport region, the second emission layer being to emit light of a second wavelength different from the first wavelength;
an electron transport region on the first emission layer and the second emission layer; and
a second electrode on the electron transport region,
wherein the first emission layer comprises:
a first sub-emission layer comprising a first hole transport host and a first sub-dopant, the first sub-emission layer being to emit the light of the first wavelength; and
a second sub-emission layer comprising a first electron transport host different from the first hole transport host and a second sub-dopant, the second sub-emission layer being to emit the light of the first wavelength, and
wherein the second emission layer comprises a second hole transport host, a second electron transport host, and a second dopant, the second emission being to emit the light of the second wavelength.