[Preparation and luminescence properties of core-shell ZnS : Cu/ZnS nano-particles].
Core-shell structured ZnS : Cu/ZnS nano-particles and Cu2+ -doped ZnS nano-particles without any shell were prepared, and the effect of ZnS shell on the luminescence properties of ZnS : Cu2+ nano-particles was studied. The observed emission peak at 450 nm was assigned to the recombination of an electron from the shallow delocalized donor levels at the t2 level of Cu2+. The ZnS shell did enhance the luminescence at 450 nm, which resulted from the reduction of nonradiative recombination sites.
Cao
Li-xin
LX
Institute of Materials Sciences and Engineering, Ocean University of China, Qingdao 266003, China.
Sun
Da-ke
DK
Lin
Ying-xia
YX