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The nature of the luminescence-flash photostimulation spectra in CdS quantum dots

O. V. Ovchinnikov, M. S. Smirnov, A. N. Latyshev, A. S. Perepelitsa, N. V. Korolev, T. S. Shatskih, and S. E. Starodubtcev

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Abstract

The photostimulated luminescence-flash effect has been detected in colloidal CdS quantum dots synthesized by the sol–gel method. The photostimulation spectra have been studied in the quantum-energy region from 0.6 to 2.0 eV. It is shown that they are caused by optical transitions from localized states having a surface nature to quantum-size electronic states.

© 2013 Optical Society of America

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