Synthesis and Luminescent Behavior of Mn_(1-X)S:A_X/ZnS Core/Shell Nanocrystals

Abstract:

Mn_(1-X)S:A_X/ZnS (A: Er, Dy) nanocrystals were synthesized by chemical precipitation method. X-ray diffraction analysis show that Mn_(1-X)S:A_X/ZnS nanocrystals were zincblende structure. The high-resolution transmission electron microscope images indicated that Mn_(1-X)S:A_X/ZnS nanocrystals show a spherical shape, and their average grain size is about 4 nm. Photoluminescence spectra of Mn_(1-X)S:A_X/ZnS nanocrystals revealed that there existed several major emission bands, ～417 nm, ~509 nm, ~580 nm, ~617nm and ~680 nm. Mn_(1-X)S:A_X/ZnS nanocrystals exhibited enhanced luminescence properties compared with the pure Mn_(1-X)S:A_X nanocrystals. The enhanced photoluminescence properties of Mn_(1-X)S:A_X/ZnS nanocrystals should be attributed to the effective suppression of nonradiative recombination by the surface-passivation layer.

• Periodical: Advanced Materials Research (Volumes 335-336)
• Pages: 669-673
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.335-336.669
• Online since: September 2011
• Authors: Li Hua Li, Yong Jun Gu, Rui Shi Xie, Jian Guo Zhu
• Keywords: Chemical Precipitation, Mn_(1-x)S:a_X/zns Nanocrystals, Photoluminescence Spectra

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