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Effect of metal oxide morphology on electron injection from CdSe quantum dots to ZnO

Zheng, Kaibo LU ; Zidek, Karel LU ; Qenawy, Mohamed LU ; Chabera, Pavel LU ; Abd El-Sadek, Mahmoud S. and Pullerits, Tönu LU (2013) In Applied Physics Letters 102(16).
Abstract
Performance of quantum dot sensitized solar cells relies on a rapid electron injection from quantum dot to metal oxide. We studied the injection process in CdSe-ZnO system by ultrafast time-resolved absorption spectroscopy for two types of acceptor morphologies-nanowires and nanoparticles' films. Based on comparison between experimental data and Marcus theory, we demonstrate that the acceptor morphology has a significant impact on electron injection due to (i) change in material permittivity and (ii) different density of the band-edge states. The results open a reference to improve injection efficiency in quantum dot-metal oxide system by selection of the acceptor morphology. (C) 2013 AIP Publishing LLC.... (More)
Performance of quantum dot sensitized solar cells relies on a rapid electron injection from quantum dot to metal oxide. We studied the injection process in CdSe-ZnO system by ultrafast time-resolved absorption spectroscopy for two types of acceptor morphologies-nanowires and nanoparticles' films. Based on comparison between experimental data and Marcus theory, we demonstrate that the acceptor morphology has a significant impact on electron injection due to (i) change in material permittivity and (ii) different density of the band-edge states. The results open a reference to improve injection efficiency in quantum dot-metal oxide system by selection of the acceptor morphology. (C) 2013 AIP Publishing LLC. [http://dx.doi.org/10.1063/1.4803173] (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Applied Physics Letters
volume
102
issue
16
publisher
AIP Publishing LLC
external identifiers
  • wos:000318269300084
  • scopus:84876976613
ISSN
0003-6951
DOI
10.1063/1.4803173
language
English
LU publication?
yes
id
85017b8d-4634-459f-b03d-139720fc4e58 (old id 3821551)
date added to LUP
2013-06-25 12:07:54
date last changed
2019-05-14 01:28:11
@article{85017b8d-4634-459f-b03d-139720fc4e58,
  abstract     = {Performance of quantum dot sensitized solar cells relies on a rapid electron injection from quantum dot to metal oxide. We studied the injection process in CdSe-ZnO system by ultrafast time-resolved absorption spectroscopy for two types of acceptor morphologies-nanowires and nanoparticles' films. Based on comparison between experimental data and Marcus theory, we demonstrate that the acceptor morphology has a significant impact on electron injection due to (i) change in material permittivity and (ii) different density of the band-edge states. The results open a reference to improve injection efficiency in quantum dot-metal oxide system by selection of the acceptor morphology. (C) 2013 AIP Publishing LLC. [http://dx.doi.org/10.1063/1.4803173]},
  articleno    = {163119},
  author       = {Zheng, Kaibo and Zidek, Karel and Qenawy, Mohamed and Chabera, Pavel and Abd El-Sadek, Mahmoud S. and Pullerits, Tönu},
  issn         = {0003-6951},
  language     = {eng},
  number       = {16},
  publisher    = {AIP Publishing LLC},
  series       = {Applied Physics Letters},
  title        = {Effect of metal oxide morphology on electron injection from CdSe quantum dots to ZnO},
  url          = {http://dx.doi.org/10.1063/1.4803173},
  volume       = {102},
  year         = {2013},
}