Abstract
The optical properties of AgInS2 quantum dots (QDs), with the average size being 5 nm, are studied in detail. The photoluminescence (PL) of AgInS2 QDs in solution and aggregation state exhibits an unusual temperature-dependent peak shift behaviour. Therefore, the relaxation process of excited QDs is detected using transient absorption technique, which shows that two kinds of emission states (involving the exciton state and trapping state) participate in the PL process of QDs. The emission of trapping state is expected to play an important role in the temperature-dependent evolution of PL peak.
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Acknowledgments
This work was supported by the National Natural Science Foundation of China (Nos. 21103161, 11274142, 11304058 and 11474131), the China Postdoctoral Science Foundation (2011M500927 and 2013T60319) and National Found for Fostering Talents of basic Science (NO. J1103202).
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Yang, F., Wang, Y., Gao, J. et al. Studying of the photoluminescence characteristics of AgInS2 quantum dots. J Nanopart Res 17, 159 (2015). https://doi.org/10.1007/s11051-015-2970-0
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DOI: https://doi.org/10.1007/s11051-015-2970-0