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

Kaibo Zheng; Karel Zidek; Mohamed Qenawy; Pavel Chabera; Mahmoud S. Abd El-Sadek; Tönu Pullerits

doi:10.1063/1.4803173

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

Kaibo Zheng, Karel Zidek, Mohamed Qenawy, Pavel Chabera, Mahmoud S. Abd El-Sadek, Tönu Pullerits

Research output: Contribution to journal › Article › peer-review

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]

Original language	English
Article number	163119
Journal	Applied Physics Letters
Volume	102
Issue number	16
DOIs	https://doi.org/10.1063/1.4803173
Publication status	Published - 2013

Bibliographical note

The information about affiliations in this record was updated in December 2015.
The record was previously connected to the following departments: Chemical Physics (S) (011001060)

Subject classification (UKÄ)

Atom and Molecular Physics and Optics

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title = "Effect of metal oxide morphology on electron injection from CdSe quantum dots to ZnO",

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]",

author = "Kaibo Zheng and Karel Zidek and Mohamed Qenawy and Pavel Chabera and {Abd El-Sadek}, {Mahmoud S.} and T{\"o}nu Pullerits",

note = "The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Chemical Physics (S) (011001060)",

year = "2013",

doi = "10.1063/1.4803173",

language = "English",

volume = "102",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics (AIP)",

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TY - JOUR

T1 - Effect of metal oxide morphology on electron injection from CdSe quantum dots to ZnO

AU - Zheng, Kaibo

AU - Zidek, Karel

AU - Qenawy, Mohamed

AU - Chabera, Pavel

AU - Abd El-Sadek, Mahmoud S.

AU - Pullerits, Tönu

N1 - The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Chemical Physics (S) (011001060)

PY - 2013

Y1 - 2013

N2 - 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]

AB - 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]

U2 - 10.1063/1.4803173

DO - 10.1063/1.4803173

M3 - Article

SN - 0003-6951

VL - 102

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 16

M1 - 163119

ER -

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

Abstract

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