US 12,136,687 B2
Quantum dot, and a composite and an electronic device including the same
Garam Park, Seoul (KR); Shang Hyeun Park, Yongin-si (KR); Min Jong Bae, Yongin-si (KR); Mi Hye Lim, Suwon-si (KR); Deukseok Chung, Yongin-si (KR); and Shin Ae Jun, Seongnam-si (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Gyeonggi-Do (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed on Jan. 28, 2022, as Appl. No. 17/586,956.
Claims priority of application No. 10-2021-0015706 (KR), filed on Feb. 3, 2021.
Prior Publication US 2022/0246804 A1, Aug. 4, 2022
Int. Cl. H01L 33/50 (2010.01); C09K 11/02 (2006.01); C09K 11/56 (2006.01); C09K 11/70 (2006.01); C09K 11/88 (2006.01)
CPC H01L 33/502 (2013.01) [C09K 11/025 (2013.01); C09K 11/565 (2013.01); C09K 11/703 (2013.01); C09K 11/883 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A quantum dot composite comprising:
a matrix, and
a plurality of quantum dots dispersed in the matrix,
wherein the plurality of quantum dots comprise
a metal comprising indium and zinc, and
a non-metal comprising phosphorous, selenium, and sulfur,
wherein the plurality of quantum dots has
a mole ratio of sulfur to indium of greater than or equal to about 3:1 and less than or equal to about 6:1, and
a mole ratio of sulfur to selenium of greater than or equal about 0.69:1 and less than or equal to about 0.89:1, and
a mole ratio of zinc to indium of greater than or equal to about 10:1 and less than or equal to about 12.4:1,
wherein the plurality of the quantum dots is configured to emit red light, and
wherein the quantum dot composite is configured to maintain a luminescence of less than about 103 percent relative to an initial luminescence thereof when the quantum dot composite is irradiated with light having a wavelength of from about 450 nanometers to about 470 nanometers for a time period of greater than or equal to about 100 hours.