US 12,139,655 B2
Quantum dot, wavelength conversion material, backlight unit, image display device, and method for manufacturing quantum dot
Yoshihiro Nojima, Annaka (JP); Shinji Aoki, Annaka (JP); and Kazuya Tobishima, Annaka (JP)
Assigned to SHIN-ETSU CHEMICAL CO., LTD., Tokyo (JP)
Appl. No. 17/603,374
Filed by SHIN-ETSU CHEMICAL CO., LTD., Tokyo (JP)
PCT Filed Feb. 10, 2020, PCT No. PCT/JP2020/005043
§ 371(c)(1), (2) Date Oct. 13, 2021,
PCT Pub. No. WO2020/217649, PCT Pub. Date Oct. 29, 2020.
Claims priority of application No. 2019-086511 (JP), filed on Apr. 26, 2019.
Prior Publication US 2022/0204845 A1, Jun. 30, 2022
Int. Cl. C09K 11/88 (2006.01); C09K 11/08 (2006.01); C09K 11/58 (2006.01); C09K 11/62 (2006.01); C09K 11/70 (2006.01); B82Y 20/00 (2011.01); B82Y 40/00 (2011.01); H01L 33/50 (2010.01)
CPC C09K 11/883 (2013.01) [C09K 11/0883 (2013.01); C09K 11/621 (2013.01); C09K 11/623 (2013.01); C09K 11/703 (2013.01); B82Y 20/00 (2013.01); B82Y 40/00 (2013.01); H01L 33/50 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A quantum dot comprising fluorescent crystalline nanoparticle, wherein
the quantum dot has a core-shell structure including a core particle containing a first metal element and a shell layer containing a second metal element,
at an interface between the core particle and the shell layer, a third metal element different from the first metal element and the second metal element is present,
an amount of the third metal element with respect to an amount of the first metal element contained in the core particle is 10% or less in terms of molar ratio,
the third metal element is at least one selected from Al, Ga, Ge, Si, Bi, Cs, Sn, Li, Na, K, Ca, and Mg, and
the core particle is selected from ZnTe, CuInS2, and AgInS2.