US 11,742,443 B2
Semiconductor nanocrystal, and method of preparing the same
Shin Ae Jun, Seongnam-si (KR); Eun Joo Jang, Suwon-si (KR); Soo Kyung Kwon, Anyang-si (KR); Taek Hoon Kim, Hwaseong-si (KR); and Won Joo Lee, Pocheon-si (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Gyeonggi-Do (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed on Feb. 9, 2021, as Appl. No. 17/171,198.
Application 17/171,198 is a continuation of application No. 16/234,694, filed on Dec. 28, 2018, granted, now 10,950,741.
Application 16/234,694 is a continuation of application No. 14/039,788, filed on Sep. 27, 2013, granted, now 10,170,648, issued on Jan. 1, 2019.
Claims priority of application No. 10-2012-0119887 (KR), filed on Oct. 26, 2012.
Prior Publication US 2021/0167228 A1, Jun. 3, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. H01L 31/0296 (2006.01); H01L 31/0304 (2006.01); H01L 31/0352 (2006.01); B82Y 40/00 (2011.01); B82Y 30/00 (2011.01)
CPC H01L 31/0296 (2013.01) [H01L 31/0304 (2013.01); H01L 31/035218 (2013.01); B82Y 30/00 (2013.01); B82Y 40/00 (2013.01); Y02E 10/544 (2013.01); Y10S 977/774 (2013.01); Y10S 977/89 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A nanocrystal comprising:
a core comprising a Group III element, and a Group V element; and
a shell disposed on the core,
wherein the shell comprises a first mole ratio of Se to S at a first position directly disposed on the core, a second mole ratio of Se to S at a second position between a surface of the core and an outermost surface of the shell, and a third mole ratio of Se to S at a third position on an outermost surface of the shell,
wherein the shell comprises a compound of the formula ZnSeyS(1-y) at the first position, wherein 0≤y≤1, and
wherein the shell has a mole ratio gradient of Se to S in a direction from the core to the outermost surface of the shell, the mole ratio gradient of Se to S comprises an increasing mole ratio of Se to S from the first mole ratio of Se to S to the second mole ratio of Se to S in a direction from the first position to the second position, and a decreasing mole ratio of Se to S from the second mole ratio of Se to S to the third mole ratio of Se to S in a direction from the second position to the third position.