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  4. Invoking the frequency dependence in square modulated light intensity techniques for the measurement of electron time constants in dye-sensitized solar cells
 
conference paper

Invoking the frequency dependence in square modulated light intensity techniques for the measurement of electron time constants in dye-sensitized solar cells

Ghaithan, Hamid M.
•
Qaid, Saif M.
•
Hezam, Mahmoud  
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Campo, Em
•
Dobisz, Ea
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2015
Nanoengineering: Fabrication, Properties, Optics, And Devices Xii
Conference on Nanoengineering - Fabrication, Properties, Optics, and Devices XII

Dye-sensitized solar cells (DSSCs) have been considered as one of the most promising new generation solar cells. Enormous research efforts have been invested to improve the efficiency of solar energy conversion which is determined by the light harvesting efficiency, electron injection efficiency and undesirable electron lifetime. A simple, cheap and trustable laser-induced photovoltage and photocurrent decay (LIPVCD) technique is adopted in this work in order to determine the electron lifetime (tau(e)) and electron transport (tau(tr)) in DSSCs. In LIPVCD technique, DSSC is illuminated by a small squared intensity-modulated laser beam. Time-based response of the DSSC is recorded using a transient digitized oscilloscope for further analysis. Frequency-based response was also investigated in this work. The frequency-dependent measurements turned out to be a powerful method to determine electron time constants in a fast, real-time fashion. Measurements were carried out using a standard dye-sensitized solar cell, and results were in excellent agreement with results obtained from traditional IMVS\IMPS measurements. Measurements were also performed for a variety of DSSCs, having various electrodes including TiO2 nanoparticles, TiO2 nanosheets with exposed {001} facets and ZnO vertically aligned nanowires. Results will also be presented and discussed in this work.

  • Details
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Type
conference paper
DOI
10.1117/12.2185921
Web of Science ID

WOS:000365508500002

Author(s)
Ghaithan, Hamid M.
Qaid, Saif M.
Hezam, Mahmoud  
Siddique, Muhemmad B.
Bedja, Idriss M.
Aldwayyan, Abdullah S.
Editors
Campo, Em
•
Dobisz, Ea
•
Eldada, La
Date Issued

2015

Publisher

Spie-Int Soc Optical Engineering

Publisher place

Bellingham

Published in
Nanoengineering: Fabrication, Properties, Optics, And Devices Xii
ISBN of the book

978-1-62841-722-7

Total of pages

8

Series title/Series vol.

Proceedings of SPIE

Volume

9556

Start page

955604

Subjects

DSSCs

•

electron lifetime

•

electron diffusion time

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LOEQ  
Event nameEvent placeEvent date
Conference on Nanoengineering - Fabrication, Properties, Optics, and Devices XII

San Diego, CA

AUG 11-12, 2015

Available on Infoscience
February 16, 2016
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/123659
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