期刊
CHEMICAL PHYSICS LETTERS
卷 466, 期 4-6, 页码 176-180出版社
ELSEVIER
DOI: 10.1016/j.cplett.2008.10.055
关键词
-
资金
- Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan
We report on linear and nonlinear optical properties of chalcopyrite CuInS2 nanoparticles prepared via thermal decomposition of metal complexes. A broad photoluminescence band with a large Stokes shift is observable, and its decay time depends strongly on the emission energies. The photoluminescence is ascribed to radiative recombination of photo-excited carriers after multiple-step hopping among deep trapping sites on nanoparticle surfaces. The imaginary part of the third-order susceptibility exhibits a resonant behaviour at the transition between the lowest quantized levels of conduction and valence bands. The third-order nonlinearity is discussed in terms of the Stark effect due to surface-trapped carriers. (C) 2008 Elsevier B. V. All rights reserved.
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