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Issue 36, 2012
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Soluble porphyrin donors for small molecule bulk heterojunction solar cells

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Abstract

This paper describes the rational design of porphyrin donors for application in solution-processed small molecule bulk heterojunction (BHJ) solar cells. The porphyrin donors were designed to possess high solubility and strong intermolecular interactions, via the appropriate selection of peripheral substituents: these molecules bear tetraethynyl porphyrin cores with two aromatic and two aliphatic groups in a trans manner. We have also demonstrated the substitution effect on the aromatic groups: energy levels, solubility and film morphology were significantly modified by the substituents, which consequently influenced the efficiencies of the solar cells as well. After optimization, the device based on [5,15-bis(phenylethynyl)-10,20-bis[(triisopropylsilyl)ethynyl]porphyrinato] magnesium(II) (2):PC60BM showed a PCE of 2.5%.

Graphical abstract: Soluble porphyrin donors for small molecule bulk heterojunction solar cells

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Publication details

The article was received on 19 Jun 2012, accepted on 26 Jul 2012 and first published on 26 Jul 2012


Article type: Paper
DOI: 10.1039/C2JM33956K
Citation: J. Mater. Chem., 2012,22, 19258-19263
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    Soluble porphyrin donors for small molecule bulk heterojunction solar cells

    J. Hatano, N. Obata, S. Yamaguchi, T. Yasuda and Y. Matsuo, J. Mater. Chem., 2012, 22, 19258
    DOI: 10.1039/C2JM33956K

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