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Proceedings Paper

Semiconductor-polymer composite with strong nonlinear optical properties
Author(s): Jan Franc; Volodymyr Babentsov; Petr Feychuk; Jan Kunc; P. Hlidek
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Paper Abstract

Photoluminescence (PL) characteristics of CdTe nanocrystals (NCs) adsorbed into polymer films are presented compared to the PL of bulk CdTe. Using the dependence of PL on excitation power we determined the carrier lifetime at 80K which indicates that carrier trapping in surface and polymer states was the main decay mechanism of excitation. The occurrence of at least two deep defect induced luminescence bands in CdTe NCs was demonstrated for the first time. Our investigation also revealed changes in PL properties induced by the visible light irradiation or by the preparation conditions. These results were explained by an increase of nonradiative recombination in the surface states of NCs and in the polymer.

Paper Details

Date Published: 8 May 2007
PDF: 8 pages
Proc. SPIE 6582, Nonlinear Optics and Applications II, 65821K (8 May 2007); doi: 10.1117/12.722491
Show Author Affiliations
Jan Franc, Charles Univ. in Prague (Czech Republic)
Volodymyr Babentsov, Institute of Semiconductor Physics (Ukraine)
Petr Feychuk, Chernivtsi State Univ. (Ukraine)
Jan Kunc, Charles Univ. (Czech Republic)
P. Hlidek, Charles Univ. (Czech Republic)

Published in SPIE Proceedings Vol. 6582:
Nonlinear Optics and Applications II
Mario Bertolotti, Editor(s)

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