Patent ID: 7468168
Filing Date: 2008-12-23
Classification: B82Y,C01G,C01P,C09K,C30B,H01L,H05B,Y02B,Y10S

Abstract:
1. A method for preparing cadmium sulfide nanocrystals emitting light at multiple wavelengths, comprising the steps of: (a) mixing a cadmium precursor and a dispersant with a solvent weakly coordinating to the cadmium precursor, and heating the mixture to obtain a cadmium precursor solution; (b) dissolving a sulfur precursor in a solvent weakly coordinating to the sulfur precursor to obtain a sulfur precursor solution; and (c) feeding the sulfur precursor solution to the heated cadmium precursor solution to prepare cadmium sulfide crystals, and growing the cadmium sulfide crystals, wherein a resultant cadmium sulfide nanocrystal shows maximum luminescence peaks at two or more wavelengths.