Open AccessTime-resolved photoluminescence study of CuInS 2/ZnS nanocrystals
Author(s) -
Thi Kim Chi Tran,
Quang Phuong Le,
Nguyen Quang Liem,
Liang Li,
Peter Reiß
Publication year - 2010
Publication title -
advances in natural sciences nanoscience and nanotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.476
H-Index - 40
ISSN - 2043-6262
DOI - 10.1088/2043-6254/1/2/025007
Subject(s) - photoluminescence , nanocrystal , trapping , excitation , materials science , emission spectrum , acceptor , spectral line , atomic physics , analytical chemistry (journal) , optoelectronics , chemistry , physics , nanotechnology , condensed matter physics , ecology , quantum mechanics , astronomy , chromatography , biology
The emission mechanism in ZnS-capped 3-nm CuInS 2 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 2 nanocrystals.