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Quantum dot photodegradation due to CdSe-ZnO charge transfer: Transient absorption study

Zidek, Karel LU ; Zheng, Kaibo LU ; Chabera, Pavel LU ; Qenawy, Mohamed LU and Pullerits, Tönu LU (2012) In Applied Physics Letters 100(24).
Abstract
We study changes in ultrafast transient absorption due to photodegradation of quantum dots attached to ZnO nanowire. The time-resolved measurements reveal impact of photodegradation on three distinct kinetic components present in transient absorption tau similar to 7 ps, 80 ps, and 7.5 ns). In addition, we observe superlinear dependence of photodegradation rate on concentration of excited electrons. The data are used to evaluate the mean electron back-recombination time of similar to 1 mu s. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4729382]
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Applied Physics Letters
volume
100
issue
24
publisher
American Institute of Physics
external identifiers
  • wos:000305269200069
  • scopus:84863328342
ISSN
0003-6951
DOI
10.1063/1.4729382
language
English
LU publication?
yes
id
4f2a5e78-44f2-4d84-8b41-7dfcf2c01329 (old id 2891267)
date added to LUP
2012-07-25 17:26:51
date last changed
2017-09-03 03:11:51
@article{4f2a5e78-44f2-4d84-8b41-7dfcf2c01329,
  abstract     = {We study changes in ultrafast transient absorption due to photodegradation of quantum dots attached to ZnO nanowire. The time-resolved measurements reveal impact of photodegradation on three distinct kinetic components present in transient absorption tau similar to 7 ps, 80 ps, and 7.5 ns). In addition, we observe superlinear dependence of photodegradation rate on concentration of excited electrons. The data are used to evaluate the mean electron back-recombination time of similar to 1 mu s. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4729382]},
  author       = {Zidek, Karel and Zheng, Kaibo and Chabera, Pavel and Qenawy, Mohamed and Pullerits, Tönu},
  issn         = {0003-6951},
  language     = {eng},
  number       = {24},
  publisher    = {American Institute of Physics},
  series       = {Applied Physics Letters},
  title        = {Quantum dot photodegradation due to CdSe-ZnO charge transfer: Transient absorption study},
  url          = {http://dx.doi.org/10.1063/1.4729382},
  volume       = {100},
  year         = {2012},
}