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Synjournal and luminescence properties of Bi$_{\textbf{2}}$S$_{\textbf{3}}$ quantum Dots
Received date: 2017-05-31
Online published: 2019-05-05
Bismuth sulfide is considered as an environment-friendly material.Here, $Bi_{2}$$S_{3}$ quantum dots ($Bi_{2}$$S_{3}$ QDs) were synthesized with a new method using 11-mercaptounde-canoic acid as a capping agent. The $Bi_{2}$$S_{3}$ QDs showed stable properties over 6 months in the atmosphere. The maximum emission wavelength for $Bi_{2}$$S_{3}$ QDs was 500 nm. The ligand exchange process between S$^{2-}$ and acetylacetonate was a critical step in the synjournal of $Bi_{2}$$S_{3}$ QDs. Spherical cores of $Bi_{2}$$S_{3}$ were formed by the nuclei due to the orientation-directed effect of acetylacetonate. The Bi$^{3+}$ ions at the surfaces of $Bi_{2}$$S_{3}$ QDs were capped by 11-mercaptoundecanoic acid molecules that could efficiently stabilize the $Bi_{2}$$S_{3}$ QDs.
Key words： bismuth sulfide; quantum dots; luminescence; solvent-thermal method
AN Baoli, ZHU Xiaoya, XU Jiaqiang . Synjournal and luminescence properties of Bi$_{\textbf{2}}$S$_{\textbf{3}}$ quantum Dots[J]. Journal of Shanghai University, 2019 , 25(2) : 227 -234 . DOI: 10.12066/j.issn.1007-2861.1973
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