Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 118, Issue 9, Pages 4918-4923Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp501266d
Keywords
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Funding
- MOST [2011CB965004]
- NSFC [21073225]
- NSF of Jiangsu Province [BK2012007]
- Special Project of National Major Scientific Equipment Development of China [2012YQ120060]
- Scientific Equipment Development Project of CAS [YZ201210]
- CAS Bairen Ji Hua and Strategic Priority Research Program [XDA01030200]
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Ag2S quantum dots (QDs) have attracted increasing attention due to their appealing optical properties in the near-infrared regime. However, a full understanding of the quantum confinement effect of Ag2S QDs has not been achieved so far. Herein, for the first time, the size-dependent excited state optical properties of Ag2S QDs are systematically investigated by photoluminescence (PL), PL excitation (PLE), and time-resolved PL spectroscopy. Experimentally, we determine the exciton Bohr radius of Ag2S QDs as 2.2 nm, which is highly consistent with theoretical results.
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