Dominant role of surface states in photoexcited carrier dynamics in CdSe nanocrystalline films prepared by chemical deposition

Authors
Maly, P Kudrna, J Trojanek, F Mikes, D Nemec, P Maciel, AC Ryan, JF
Citation
P. Maly et al., Dominant role of surface states in photoexcited carrier dynamics in CdSe nanocrystalline films prepared by chemical deposition, APPL PHYS L, 77(15), 2000, pp. 2352-2354
Citations number
8
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
APPLIED PHYSICS LETTERS
ISSN journal
00036951 → ACNP
Volume
77
Issue
15
Year of publication
2000
Pages
2352 - 2354
Database
ISI
SICI code
0003-6951(20001009)77:15<2352:DROSSI>2.0.ZU;2-Y
Abstract
We report on ultrafast carrier dynamics in nanocrystalline CdSe thin films prepared by chemical solution deposition. The photoluminescence and transie nt absorption dynamics have spectrally dependent decay faster at shorter wa velengths. The spectral behavior of the decay rates in samples with differe nt nanocrystal sizes and the sensitivity of the dynamics on the surface mod ification indicate the dominant role of the surface states in the photolumi nescence. (C) 2000 American Institute of Physics. [S0003-6951(00)04741-0].