Reverse micelle-derived Cu-doped Zn(1-x)Cd(x)S quantum dots and their core/shell structure.
Reverse micelle chemistry-derived Cu-doped Zn(1-x)Cd(x)S quantum dots (QDs) with the composition (x) of 0, 0.5, 1 are reported. The Cu emission was found to be dependent on the host composition of QDs. While a dim green/orange emission was observed from ZnS:Cu QDs, a relatively strong red emission could be obtained from CdS:Cu and Zn(0.5)Cd(0.5)S:Cu QDs. Luminescent properties of undoped QDs versus Cu-doped ones and quantum yields of alloyed ZnCdS versus CdS QDs are compared and discussed. To enhance Cu-related red emission of CdS:Cu and Zn(0.5)Cd(0.5)S:Cu core QDs, core/shell structured QDs with a wider band gap of ZnS shell are also demonstrated.
Kim
Jong-Uk
JU
Department of Materials Science and Engineering, Hongik University, Seoul 121-791, South Korea.
Kim
Young Kwan
YK
Yang
Heesun
H
D019187:Cadmium Compounds / Q000737:chemistry*; D008823:Micelles; D049329:Nanostructures / Q000737:chemistry*; D010316:Particle Size; D045663:Quantum Dots; D018036:Selenium Compounds / Q000737:chemistry*; D017967:Zinc Compounds / Q000737:chemistry*
D019187:Cadmium Compounds; D008823:Micelles; D018036:Selenium Compounds; D017967:Zinc Compounds; C058667:cadmium selenide; C044696:zinc selenide