Defect-induced photoluminescence and third-order nonlinear optical response of chemically synthesized chalcopyrite CuInS2 nanoparticles
| Autor: | Toshihiro Kuzuya, K. Ito, Takamitsu Kino, T. Sofue, Kenji Sumiyama, Yasushi Hamanaka |
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| Rok vydání: | 2008 |
| Předmět: |
Photoluminescence
Valence (chemistry) Chemistry Thermal decomposition General Physics and Astronomy Nanoparticle Thermal conduction Molecular physics Condensed Matter::Materials Science symbols.namesake Stark effect Stokes shift symbols Spontaneous emission Physical and Theoretical Chemistry Atomic physics |
| Zdroj: | Chemical Physics Letters. 466:176-180 |
| ISSN: | 0009-2614 |
| DOI: | 10.1016/j.cplett.2008.10.055 |
| Popis: | We report on linear and nonlinear optical properties of chalcopyrite CuInS 2 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. |
| Databáze: | OpenAIRE |
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