The effect of co-sensitization methods between N719 and boron dipyrromethene triads on dye-sensitized solar cell performance
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Author list: Wanwong S., Sangkhun W., Wootthikanokkhan J.
Publisher: Royal Society of Chemistry
Publication year: 2018
Journal: RSC Advances (2046-2069)
Volume number: 8
Issue number: 17
Start page: 9202
End page: 9210
Number of pages: 9
ISSN: 2046-2069
eISSN: 2046-2069
Languages: English-Great Britain (EN-GB)
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Abstract
A boron dipyrromethene (BODIPY) featuring triphenylamine triad, BD, has been synthesized as a co-sensitizer in dye-sensitized solar cells (DSCs). The optical and electrochemical properties of BD have been characterized using UV-vis spectroscopy and cyclic voltammetry. DSCs containing co-sensitizers, N719 and BD, have been prepared in two procedures using co-deposition and stepwise deposition. The influences of the staining processes, co-deposition and stepwise deposition on dye loading, dye dispersion on a TiO2 photoanode and DSC performance have been investigated using FTIR, SEM-EDS, I-V test and IPCE measurement, respectively. We found that stepwise co-sensitization provided higher solar cell efficiency, compared to those stained with a co-deposition method. N719/5% BD showed the highest power conversion efficiency of 5.14%. Interestingly, the enhanced device efficiency was 66% higher than that of a device containing the single N719 dye. ฉ 2018 The Royal Society of Chemistry.
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