Patent ID: 9472717
Filing Date: 2016-10-18
CPC Classification: C09K,G01N,H01L

Claim Text:
1. A quantum dot comprising: an inner region comprising a first metal sulfide, selenide or sulfide selenide, and an outer region having a different composition than the inner region, said outer region comprising a second metal sulfide, selenide or sulfide selenide, wherein a molar ratio of (M1+M2):(S+Se) is from 1 to 8 and M1 and M2 are different metal elements and the metal of the second metal sulfide, selenide or sulfide selenide is selected from the group consisting of zinc, tin, nickel, cobalt, iron, copper and manganese; and a cap, said quantum dot having at least one narrow bandwidth emission in the wavelength range from of about 600 nm to about 1100 nm.