Time-resolved photoluminescence study of CuInS<sub>2</sub>/ZnS nanocrystals
Tran, Thi Kim Chi; Le, Quang Phuong; Nguyen, Quang Liem; Li, Liang; Reiss, Peter; Tran, Thi Kim Chi; Institute of Materials Science (IMS), Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam; Le, Quang Phuong; Institute of Materials Science (IMS), Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam; Nguyen, Quang Liem; Institute of Materials Science (IMS), Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam; Li, Liang; CEA Grenoble, DSM/INAC/SPrAM (UMR 5819 CEA-CNRS-Université Joseph Fourier)/LEMOH, 17 rue des Martyrs, 38054 Grenoble Cedex 9, France; Reiss, Peter; CEA Grenoble, DSM/INAC/SPrAM (UMR 5819 CEA-CNRS-Université Joseph Fourier)/LEMOH, 17 rue des Martyrs, 38054 Grenoble Cedex 9, France
Журнал:
Advances in Natural Sciences: Nanoscience and Nanotechnology
Дата:
2010-06-01
Аннотация:
The emission mechanism in ZnS-capped 3-nm CuInS<sub>2</sub> nanocrystals was studied by using time-resolved photoluminescence (TRPL). A typical TRPL spectrum demonstrates two broad emission bands. The spectral shifts as functions of the excitation power density and delay times from the excitation moment prove that both emission bands originate from donor-acceptor pair recombinations. Moreover, the temperature-dependent TRPL measurement revealed the importance of trapping sites in the emission mechanism of CuInS<sub>2</sub> nanocrystals.
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