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Issue 39, 2013
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Synthesis of diphenylamino-carbazole substituted BODIPY dyes and their photovoltaic performance in dye-sensitized solar cells

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Abstract

Non-alkylated BODIPY dye YHO-1 and hexa-alkylated BODIPY dye YHO-2, which have a diphenylamino-carbazole moiety as an electron-donating group at the 8-position on the BODIPY core and a carboxyhexyl group as an anchoring group on the carbazole ring, were designed and developed as photosensitizers for dye-sensitized solar cells (DSSCs). From the molecular structures of YHO-1 and YHO-2, when the two dyes were adsorbed on the TiO2 surface, it is assumed that the BODIPY core is located in close proximity to the TiO2 surface. The dye YHO-2 (Φf = 0.62) exhibits a significantly higher fluorescence quantum yield (Φf) than YHO-1 (Φf = 0.06). The short-circuit photocurrent density (Jsc) and solar energy-to-electricity conversion yield (η) for a DSSC based on YHO-2 are greater than those of YHO-1. This work demonstrates that fluorescent BODIPY dyes can inject electrons efficiently from the BODIPY core to the conduction band (CB) of the TiO2 electrode, but non-fluorescent BODIPY dyes result in lowering of photocurrent generation due to radiationless relaxation of the photoexcited dye.

Graphical abstract: Synthesis of diphenylamino-carbazole substituted BODIPY dyes and their photovoltaic performance in dye-sensitized solar cells

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Publication details

The article was received on 12 Jul 2013, accepted on 30 Jul 2013 and first published on 05 Aug 2013


Article type: Paper
DOI: 10.1039/C3RA43577F
RSC Adv., 2013,3, 18099-18106

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    Synthesis of diphenylamino-carbazole substituted BODIPY dyes and their photovoltaic performance in dye-sensitized solar cells

    Y. Ooyama, Y. Hagiwara, T. Mizumo, Y. Harima and J. Ohshita, RSC Adv., 2013, 3, 18099
    DOI: 10.1039/C3RA43577F

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