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Issue 28, 2013
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Molecular engineering of organic sensitizers for highly efficient gel-state dye-sensitized solar cells

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Abstract

Three novel organic sensitizers incorporating a planar 4,4-dimethyl-4H-indeno[1,2-b]thiophene or 4,4-dimethyl-4H-indeno[1,2-b]thienothiophene in the bridged group have been designed and synthesized for use in gel-state dye-sensitized solar cells. The photovoltaic performance is quite sensitive to the bridged unit. The optimized cell in JK-276 using a gel electrolyte gave a short circuit photocurrent density of 16.61 mA cm−2, an open circuit voltage of 0.69 V and a fill factor of 0.72, affording an overall conversion efficiency of 8.31% under standard global AM 1.5 solar cell conditions. The efficiency is close to the value of the liquid-state cell (8.40%). The gel-electrolyte cell of JK-276 showed an excellent long-term stability, which remained almost unchanged during the 300 h light soaking test at 70 °C.

Graphical abstract: Molecular engineering of organic sensitizers for highly efficient gel-state dye-sensitized solar cells

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The article was received on 20 Mar 2013, accepted on 25 Apr 2013 and first published on 26 Apr 2013


Article type: Paper
DOI: 10.1039/C3TA11132F
J. Mater. Chem. A, 2013,1, 8226-8233

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    Molecular engineering of organic sensitizers for highly efficient gel-state dye-sensitized solar cells

    H. Choi, S. Paek, K. Lim, C. Kim, M. Kang, K. Song and J. Ko, J. Mater. Chem. A, 2013, 1, 8226
    DOI: 10.1039/C3TA11132F

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