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Issue 1, 2008
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Photovoltaic properties of three new cyanine dyes for dye-sensitized solar cells

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Abstract

Three carboxylated cyanine dyes, 2-[(1-butyl-3,3-dimethyl-5-carboxylindoline-2-ylidene)propenyl]-[1-butyl-3,3-dimethyl-7-(1-ethyl-1H-1,2,3-triazole-4-yl]-1H-benz[e]indolium iodide (Cy1), 2-[(1-butyl-3,3-dimethyl-5-carboxyl-indoline-2-ylidene)propenyl]-{1-butyl-3,3-dimethyl-7-[(4-piperidine-N-ethyl-1,8-naphthalimide)-1H-1,2,3-triazole-4-yl]}-1H-benz[e]indolium iodide (Cy2) and 2-[(1-butyl-3,3-dimethyl-5-carboxyl-indoline-2-ylidene)propenyl)-[1-butyl-3,3-dimethyl-7-{(4-piperidine-N-butyl-1,8-naphthalimide)-1H-1,2,3-triazole-4-yl}]-1H-benz[e]indolium iodide (Cy3), have been synthesized and characterized with regard to their structures and electrochemical properties. Upon adsorption onto a TiO2electrode, the absorption spectra of the three cyanine dyes are all broadened to both red and blue sides compared with their respective spectra in an acetonitrile and ethanol mixture. Cy2 and Cy3, containing a naphthalimide group, have stronger absorption intensities and broader absorption spectra than Cy1, which consequently leads to better light-to-electricity conversion properties. Among the three cyanine dyes, Cy3 generated the highest photoelectric conversion yield of 4.80% (Jsc = 14.5 mA cm–2, Voc = 500 mV, FF = 0.49) under illumination with 75 mW cm–2 white light from a Xe lamp.

Graphical abstract: Photovoltaic properties of three new cyanine dyes for dye-sensitized solar cells

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Publication details

The article was received on 13 Aug 2007, accepted on 15 Oct 2007 and first published on 31 Oct 2007


Article type: Paper
DOI: 10.1039/B712439B
Citation: Photochem. Photobiol. Sci., 2008,7, 63-68
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    Photovoltaic properties of three new cyanine dyes for dye-sensitized solar cells

    W. Wu, J. Hua, Y. Jin, W. Zhan and H. Tian, Photochem. Photobiol. Sci., 2008, 7, 63
    DOI: 10.1039/B712439B

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