Issue 14, 2021

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

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.

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

Supplementary files

Article information

Article type
Paper
Submitted
17 apr 2021
Accepted
19 jún 2021
First published
21 jún 2021
This article is Open Access
Creative Commons BY-NC license

Nanoscale Adv., 2021,3, 4271-4275

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

S. Liu, H. Wang, A. Feng, J. Chang, C. Zhang, Y. Shi, Y. Zhai, V. Biju and Z. Wang, Nanoscale Adv., 2021, 3, 4271 DOI: 10.1039/D1NA00282A

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