Patent ID: 7855091

Claim:
A method for tuning a dopant based core/shell/shell semiconductor having a quantum dot core and an excitation spectrum in a wavelength range from approximately 275 nm to approximately 490 nm consisting of the steps of: selecting a dopant based core/shell/shell semiconductor comprising an alloy of cadmium sulfide (CdS) and zinc sulfide (ZnS) semiconductor materials to form a core; a concentric layer composed of in-situ formed Cd x Zn (1-x) S alloy embedded with the dopant manganese (Mn) forming an inner shell surrounding the core and an outer shell of zinc sulfide (ZnS) wherein the semiconductor exhibits an excitation spectrum that captures solar light; and tuning the semiconductor by changing the amount of CdS and ZnS in the alloy composition of the dopant based core.