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Title: Enhanced efficiency of phenothiazine derivative organic dye-sensitized ionic liquid solar cells on aging
Authors: Xie, Z.B. 
Midya, A. 
Loh, K.P. 
Blackwood, D.J. 
Keywords: dye-sensitized solar cells
electrochemical impedance spectroscopy
ionic liquid
phenothiazine derivative organic dyes
Issue Date: Jun-2013
Citation: Xie, Z.B., Midya, A., Loh, K.P., Blackwood, D.J. (2013-06). Enhanced efficiency of phenothiazine derivative organic dye-sensitized ionic liquid solar cells on aging. Progress in Photovoltaics: Research and Applications 21 (4) : 525-533. ScholarBank@NUS Repository.
Abstract: We have used electrochemical impedance to investigate the improvement in photovoltaic performance in aging of ionic liquid dye-sensitized solar cells using a high-absorption coefficient organic dye (2E)-2-cyano-3-(5-(5-((E)-2-(10- (2-ethylhexyl)-10H-phenothiazin-7-yl)vinyl)thiophen-2-yl)thiophen-2-yl)acrylic acid, which is in contrast to N719-based devices. It was found that the enhancement is due to reduced recombination of the photoexcited electrons. The decreased recombination plausibly originates from molecular re-orientation along with cation adsorption, with Fourier transform infrared spectra lending support to the former mechanism. After aging, the photovoltaic device using the organic dye outperforms the counterpart by the ruthenium complex dye and achieves an impressive efficiency of 5.6% under AM 1.5 100 mW/cm2 illumination. Copyright © 2011 John Wiley & Sons, Ltd.
Source Title: Progress in Photovoltaics: Research and Applications
ISSN: 10627995
DOI: 10.1002/pip.1225
Appears in Collections:Staff Publications

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