Article ID Journal Published Year Pages File Type
1645351 Materials Letters 2013 4 Pages PDF
Abstract

•Co-doped ZnS nanospheres with excellent crystalline quality have been synthesized.•The prepared ZnS nanospheres exhibit a narrow and strong ultraviolet emission.•Co doping dramatically enhances the ultraviolet emission intensity of ZnS.•Co-doped ZnS is a promising candidate for ultraviolet functional material.

High-quality ultraviolet (UV) emission materials are essential for making short-wavelength light-emitting diodes and diode lasers. We report here that efficient ultraviolet luminescence at room-temperature can be obtained in ZnS nanospheres synthesized with an economical and simple chemical bath deposition method. The homogeneity, crystallinity and size of cubic ZnS nanospheres lead to a narrow and strong UV emission centered at 345 nm. Interestingly, Co doping dramatically enhances the near band edge UV emission and suppress the deep-level (DL) emission due to the improvement of crystallinity and the decrease of the DL defects. This work suggests that Co-doped ZnS is a promising candidate for ultraviolet functional material.

Related Topics
Physical Sciences and Engineering Materials Science Nanotechnology
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