Photoluminescent Characteristics of ZnS Quantum Dots Synthesized in Non-Aqueous-Phase

Jing Liu; Ming Ying; Yu Ling Tan; Bo Xi

doi:10.4028/www.scientific.net/AMR.750-752.991

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 750-752Photoluminescent Characteristics of ZnS Quantum...

Photoluminescent Characteristics of ZnS Quantum Dots Synthesized in Non-Aqueous-Phase

Abstract:

ZnS quantum dots (ZnS QDs) synthesized in aqueous solution is easy to gather a mass, which always results in low quantum yield. So, in this study benzene was used as reaction medium in which ZnS QDs with different hues were synthesized, and the hues of ZnS QDs were depend on the molar ratio of Zn (CH₃COO)₂ and Na₂S·9H₂O. The results show the emission spectra of ZnS QDs shifts with the change of the precursor molar ratio but the absorption peak at 310nm is not. The emission peaks centered at 430nm and 580nm at higher molar ratio [Zn²⁺]/[S^2-] with blue-violet emitting phosphors; but, ZnS QDs synthesized at higher molar ratio [S^2-]/[Zn²⁺] have orange-red emission at 580nm only. The X-ray diffraction analysis shows the crystallinity of ZnS QDs is better at [Zn²⁺]/[S^2-]=1:10, which are typical zinc blend with nanorod structure.

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Periodical:

Advanced Materials Research (Volumes 750-752)

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991-994

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https://doi.org/10.4028/www.scientific.net/AMR.750-752.991

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Online since:

August 2013

Authors:

Jing Liu, Ming Ying, Yu Ling Tan, Bo Xi

Keywords:

Non-Aqueous-Phase Synthesis, Photoluminescence Spectra, ZnS Quantum Dots

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