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Photoluminescence investigations of sulfur quantum dots synthesized by a bubbling-assisted strategy

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Title: Photoluminescence investigations of sulfur quantum dots synthesized by a bubbling-assisted strategy
Authors: Liu, Shuo Browse this author
Wang, Henggang Browse this author
Feng, Anrui Browse this author
Chang, Jianyu Browse this author
Zhang, Chuanchuan Browse this author
Shi, Yu-e Browse this author
Zhai, Yongqing Browse this author
Biju, Vasudevanpillai Browse this author
Wang, Zhenguang Browse this author
Issue Date: 20-Jul-2021
Publisher: Royal Society of Chemistry
Journal Title: Nanoscale advances
Volume: 3
Issue: 14
Start Page: 4271
End Page: 7275
Publisher DOI: 10.1039/d1na00282a
Abstract: Sulfur quantum dots (S-dots) emerge as promising luminescent materials owing to their remarkable optical properties. However, the mechanisms of their formation and photoluminescence remain concealed. We reveal these mechanisms by the bubbling-assisted synthesis and spectroscopic study of S-dots formed from sulfur ions produced by the alkaline oxidation of bulk sulfur under the passivation of PEG. The emission colour of the S-dots depends on the size, explained by the quantum confinement effect. The dots' luminescent quantum efficiency is strongly affected by the surface sulfur species, which is optimized by the proper surface oxidation. The simple synthesis, excellent luminescence properties, and metal-free nature attract S-dots to optoelectronic and electroluminescence applications.
Type: article
Appears in Collections:電子科学研究所 (Research Institute for Electronic Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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