Controlled Synthesis of Ag2S Quantum Dots and Experimental Determination of the Exciton Bohr Radius
The Journal of Physical Chemistry C2014Vol. 118(9), pp. 4918–4923
Citations Over TimeTop 10% of 2014 papers
Abstract
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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