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Proceedings Paper

Invoking the frequency dependence in square modulated light intensity techniques for the measurement of electron time constants in dye-sensitized solar cells
Author(s): Hamid M. Ghaithan; Saif M. Qaid; Mahmoud Hezam; Muhemmad B. Siddique; Idriss M. Bedja; Abdullah S. Aldwayyana
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Paper Abstract

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 (τe) and electron transport (τtr) 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 IMVSIMPS 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.

Paper Details

Date Published: 20 August 2015
PDF: 8 pages
Proc. SPIE 9556, Nanoengineering: Fabrication, Properties, Optics, and Devices XII, 955604 (20 August 2015); doi: 10.1117/12.2185921
Show Author Affiliations
Hamid M. Ghaithan, King Saud Univ. (Saudi Arabia)
Saif M. Qaid, King Saud Univ. (Saudi Arabia)
Mahmoud Hezam, King Saud Univ. (Saudi Arabia)
Ecole Polytechnique Fédérale de Lausanne (Switzerland)
Muhemmad B. Siddique, Univ. of Management and Technology (Pakistan)
Idriss M. Bedja, King Saud Univ. (Saudi Arabia)
Abdullah S. Aldwayyana, King Saud Univ. (Saudi Arabia)

Published in SPIE Proceedings Vol. 9556:
Nanoengineering: Fabrication, Properties, Optics, and Devices XII
Eva M. Campo; Elizabeth A. Dobisz; Louay A. Eldada, Editor(s)

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