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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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Supplementary files

Article information


Submitted
19 Jun 2012
Accepted
26 Jul 2012
First published
26 Jul 2012

J. Mater. Chem., 2012,22, 19258-19263
Article type
Paper

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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