Formation and optical properties of ZnSe and ZnS nanocrystals in glasses

ZnSe and ZnS nanocrystals (NCs) were precipitated in glasses through heat-treatment. High resolution transmission electron microscope image confirmed that ZnSe NCs were formed in the silicate glasses, and the X-ray diffraction patterns confirmed that ZnS NCs were precipitated in the borosilicate gla...

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Published inJournal of non-crystalline solids Vol. 429; pp. 79 - 82
Main Authors Xia, Mengling, Liu, Chao, Zhao, Zhiyong, Ai, Bing, Yin, Qiaoyun, Xie, Jun, Han, Jianjun, Zhao, Xiujian
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.12.2015
Subjects
Borosilicate glasses
Electron microscopes
Glass
Heat treatment
Image transmission
Nanocrystals
Quantum dots
Zinc selenides
Zinc sulfides
ZnS
ZnSe
Nanocrystals
ZnSe
Quantum dots
ZnS
Glass
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Summary:ZnSe and ZnS nanocrystals (NCs) were precipitated in glasses through heat-treatment. High resolution transmission electron microscope image confirmed that ZnSe NCs were formed in the silicate glasses, and the X-ray diffraction patterns confirmed that ZnS NCs were precipitated in the borosilicate glasses. Absorption shoulders of the ZnSe NCs and ZnS NCs appeared at ~2.76eV and ~3.78eV, corresponding to the bandgap energies of bulk ZnSe and ZnS crystals, respectively. Instead of the intrinsic emissions, broad-band visible photoluminescence from the surface defects or color centers in the glasses was observed from these ZnSe or ZnS NCs. •Zinc blended ZnSe nanocrystals were precipitated in silicate glasses.•Hexagonal wurtzite ZnS nanocrystals were precipitated in borosilicate glasses.•Both ZnSe and ZnS nanocrystals showed broad-band visible emission upon excitation.
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ISSN:0022-3093
1873-4812
DOI:10.1016/j.jnoncrysol.2015.08.034