US 11,788,005 B2
Quantum dots, a composition or composite including the same, and an electronic device including the same
Tae Gon Kim, Hwaseong-si (KR); Shin Ae Jun, Seongnam-si (KR); Taek hoon Kim, Hwaseong-si (KR); Hyeyeon Yang, Suwon-si (KR); Nayoun Won, Suwon-si (KR); Jongmin Lee, Hwaseong-si (KR); and Mi Hye Lim, Suwon-si (KR)
Assigned to SAMSUNG DISPLAY CO., LTD., Gyeonggi-Do (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed on May 25, 2022, as Appl. No. 17/824,225.
Application 17/824,225 is a continuation of application No. 16/904,664, filed on Jun. 18, 2020, granted, now 11,352,558.
Claims priority of application No. 10-2019-0072494 (KR), filed on Jun. 18, 2019.
Prior Publication US 2022/0298413 A1, Sep. 22, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. C09K 11/70 (2006.01); C08F 220/38 (2006.01); C09K 11/02 (2006.01); C09K 11/88 (2006.01); H01L 33/00 (2010.01); H01L 33/50 (2010.01); B82Y 20/00 (2011.01)
CPC C09K 11/70 (2013.01) [C08F 220/382 (2020.02); C09K 11/025 (2013.01); C09K 11/88 (2013.01); C09K 11/883 (2013.01); H01L 33/005 (2013.01); H01L 33/502 (2013.01); B82Y 20/00 (2013.01); H01L 2933/0025 (2013.01); H01L 2933/0041 (2013.01)] 21 Claims
OG exemplary drawing
 
1. Quantum dots each comprising
a semiconductor nanocrystal core comprising indium, phosphorous, and optionally zinc,
a semiconductor nanocrystal shell disposed on the semiconductor nanocrystal core, the semiconductor nanocrystal shell comprising zinc, selenium, and sulfur,
wherein the quantum dots are configured to exhibit a maximum photoluminescence peak in a green light wavelength region, and in an ultraviolet-visible absorption spectrum of the quantum dots, a ratio A450/Afirst, of an absorption value at 450 nanometers to an absorption value of a first absorption peak is greater than or equal to about 0.7, and a valley depth (VD) defined by the following equation is greater than or equal to about 0.4:
(Absfirst−Absvalley)/Absfirst=VD
wherein, Absfirst is the absorption value of the first absorption peak wavelength, and Absvalley is an absorption value at a lowest point of the valley adjacent to the first absorption peak, and
wherein the maximum photoluminescence peak of the quantum dots has a full width at half maximum of less than or equal to 40 nanometers.