Dynamics of highly excited charge carriers in CdS nanocrystallites embedded into ZrO2 films

Authors
Mikulskas, I Tomasiunas, R Vaitkus, JV Bovier, C Dumas, JG Mugnier, J
Citation
I. Mikulskas et al., Dynamics of highly excited charge carriers in CdS nanocrystallites embedded into ZrO2 films, MAT SCI E C, 15(1-2), 2001, pp. 71-73
Citations number
6
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
MATERIALS SCIENCE & ENGINEERING C-BIOMIMETIC AND SUPRAMOLECULAR SYSTEMS
ISSN journal
09284931 → ACNP
Volume
15
Issue
1-2
Year of publication
2001
Pages
71 - 73
Database
ISI
SICI code
0928-4931(20010820)15:1-2<71:DOHECC>2.0.ZU;2-3
Abstract
Transient grating experiments were performed at room temperature in CdS nan ocrystallites (ne) embedded into ZrO2 sol-gel films. The dynamics of photo- generated carrier showed to depend on the excitation intensity. Relaxation of non-equilibrium charge carriers take place through two channels: electro n-hole recombination in nanocrystallite volume and nanocrystallite/ZrO2 mat rix surface states. At higher intensities a saturation of the excited surfa ce states occurs simultaneously with the carrier heating, Systematic increa se of the carrier lifetime is observed with the ne size. (C) 2001 Elsevier Science B.V. All rights reserved.