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Issue 13, 2017
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Insulating polymer additives in small molecule and polymer photovoltaics: how they are tolerated and their use as potential interlayers

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Abstract

Additives are key to achieving optimal morphologies and efficient performance in bulk heterojunction organic photovoltaics. In this work we analyze the impact of three insulating polymers [ethylene acrylic elastomers, polystyrene and poly(methyl methacrylate)] in prototypical small molecule and polymer photovoltaic devices. We find that small molecule–semiconductors and polymer–semiconductors vary remarkably in their tolerance of the type of insulator as well as the degree of insulator incorporation. Insulating polymers capable of self-assembly or infiltration into the organic–semiconductor matrix have a positive or negligible impact on the performance of both small molecule and polymer devices. The spontaneous migration of ethylene acrylic elastomers to the device surface make them adverse additives, however our preliminary data indicates their potential application as a spontaneously forming cathode interlayer in small molecule devices where they match or exceed the performance of evaporated LiF interlayers.

Graphical abstract: Insulating polymer additives in small molecule and polymer photovoltaics: how they are tolerated and their use as potential interlayers

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Publication details

The article was received on 01 Feb 2017, accepted on 06 Mar 2017 and first published on 07 Mar 2017


Article type: Paper
DOI: 10.1039/C7TC00525C
Citation: J. Mater. Chem. C, 2017,5, 3315-3322
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    Insulating polymer additives in small molecule and polymer photovoltaics: how they are tolerated and their use as potential interlayers

    J. G. Manion, D. Gao, P. M. Brodersen and D. S. Seferos, J. Mater. Chem. C, 2017, 5, 3315
    DOI: 10.1039/C7TC00525C

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