Effects of coating and thermal annealing on the photoluminescence properties of ZnS/ZnO one-dimensional radial heterostructures
作者： Changhyun Jin , Hyunsoo Kim , Kyungjoon Baek , Chongmu Lee , None
DOI: 10.1016/J.MSEB.2010.02.029
关键词:
摘要: Abstract Influence of the thermal annealing atmosphere and ZnO layer thickness on photoluminescence properties ZnS-core/ZnO-shell one-dimensional (1D) radial heterostructures was investigated. ZnS nanowires were synthesized by evaporation powders then coated with using sputter-deposition technique to form nanostructures. TEM XRD analysis results reveal that a crystalline phase zinc blende structure an wurtzite coexist in cores whereas amorphous exists shells. Photoluminescence (PL) measurements at room temperature show green emission ZnS/ZnO 1D is enhanced oxygen due decrease concentration vacancies shells, which normally absorbs light emitted from core, during process. In contrast, degraded argon since core absorbed more efficiently defects shell crystallization shells annealing. The PL intensity decreased increasing layers absorption or some interfacial effects.
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