Author/Authors :
Xu، نويسنده , , Wei and Meng، نويسنده , , Xiangdong and Ji، نويسنده , , Wenyu and Jing، نويسنده , , Pengtao and Zheng، نويسنده , , Jinju and Liu، نويسنده , , Xueyan and Zhao، نويسنده , , Jialong and Li، نويسنده , , Haibo، نويسنده ,
Abstract :
Optical properties of Mn-doped ZnxCd1−xS nanocrystals were studied by steady-state and time-resolved photoluminescence (PL) spectroscopy. The doped nanocrystals with PL quantum yield up to 29% were synthesized by growing a thin ZnS layer on the MnS core and then growing a CdS layer with different thicknesses using nucleation-doping strategy. The absorption band edge of ZnxCd1−xS nanocrystals was tuned from 425 to 475 nm by growing the CdS layer with various thicknesses under different Zn/Cd molar ratios to vary the composition. The PL band of Mn-doped nanocrystals was found to originate from emissions of Mn2+ ions and defect states.
