US 11,981,852 B2
Quantum dots and devices including the same
Yuho Won, Seoul (KR); Sung Woo Kim, Hwaseong-si (KR); Jin A Kim, Suwon-si (KR); Jeong Hee Lee, Seongnam-si (KR); Tae Hyung Kim, Seoul (KR); and Eun Joo Jang, Suwon-si (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Gyeonggi-Do (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed on Feb. 24, 2023, as Appl. No. 18/113,650.
Application 18/113,650 is a continuation of application No. 17/187,926, filed on Mar. 1, 2021, granted, now 11,591,518.
Application 17/187,926 is a continuation of application No. 16/298,108, filed on Mar. 11, 2019, granted, now 10,954,440, issued on Mar. 23, 2021.
Claims priority of application No. 10-2018-0028321 (KR), filed on Mar. 9, 2018.
Prior Publication US 2023/0212456 A1, Jul. 6, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. C09K 11/88 (2006.01); B82Y 20/00 (2011.01); B82Y 40/00 (2011.01); C09K 11/02 (2006.01); H05B 33/14 (2006.01); H10K 50/115 (2023.01); H10K 50/15 (2023.01); H10K 50/16 (2023.01); H10K 50/17 (2023.01)
CPC C09K 11/883 (2013.01) [C09K 11/02 (2013.01); H05B 33/14 (2013.01); H10K 50/115 (2023.02); H10K 50/15 (2023.02); H10K 50/16 (2023.02); H10K 50/17 (2023.02); H10K 50/171 (2023.02); B82Y 20/00 (2013.01); B82Y 40/00 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An electroluminescent device comprising
a first electrode and a second electrode, and
a light emitting layer disposed between the first electrode and the second electrode,
wherein the light emitting layer comprises a quantum dot,
wherein the quantum dot comprises:
zinc, selenium, tellurium, and sulfur,
wherein the quantum dot does not comprise cadmium,
wherein in the quantum dot, a mole ratio of sulfur with respect to selenium is less than or equal to about 2.4:1,
wherein the quantum dot in the light emitting layer is configured to emit blue light having a maximum peak emission wavelength of greater than or equal to 450 nanometers and less than or equal to about 480 nanometers upon a voltage application, and
wherein a peak external quantum efficiency of the electroluminescent device is greater than or equal to about 4%.