Optical Study of the Transition Metals (M=Cr, Mn, Co, Ni, Cu) Doped M-CdS/ZnS Core/Shell Nanoparticles

摘要

High temperature colloidal doping method has been used to synthesistransition metals (M = Cr, Mn, Co, Ni, Cu) MCdS/ZnS core/shell nanoparticles. Transition metalsions were incorporated into the CdS quantum dots pursued by 6mono lyres of the ZnS materials, which was enveloped doped CdS um dots. These doped nanoparticles were furtherstudied using transmission electron microscopy (TEM), time resolved spectroscopy, ultraviolet-visible (UV-VIS)spectroscopy and photoluminescence (PL) spectroscopy measurements. Transition metalsdoped CdS/ZnS nanoparticlesconfirm the dual-peaks, first peak (sharp emission peak) is due to CdS quantum dot at 435 nm ; second peak (broad emissionpeak )(510–660 nm) is come from Transition metalions as compared to CdS/ZnS Quantum dots.