Effect of precursor molar ratio of [S2?]/[Zn2+] on the lifetime of ZnS nanocrystals
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Abstract:
Undoped ZnS nanocrystals(NCs) with different precursor molar ratios of [S2-]/[Zn2+] are prepared by the chemical precipitation method.The structural and optical properties of the samples are characterized by the X-ray diffraction(XRD) spectra,photoluminescence(PL) spectra and PL decay spectra.The XRD analysis shows that the crystal quality of ZnS NCs becomes better and the grain size is larger at higher [S2-]/[Zn2+] ratios.The PL peaked at 430 nm decreases with the [S2-]/[Zn2+] ratio increasing,which is asc...
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Clc Number:
O742
