Binary Organic Photovoltaic Blends: A Simple Rationale for Optimum Compositions

Polymer/small molecule binaries, such as P3HT:PC61BM display eutectic phase behavior with optimum photovoltaic performance at slightly hypoeutectic compositions (with respect to polymer content). Such hypoeutectic blends readily solidify into a finely phase‐separated matrix surrounding primary cryst...

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Bibliographic Details
Published in:Advanced materials (Weinheim) 2008-09, Vol.20 (18), p.3510-3515
Main Authors: Müller, Christian, Ferenczi, Toby A. M., Campoy-Quiles, Mariano, Frost, Jarvist M., Bradley, Donal D. C., Smith, Paul, Stingelin-Stutzmann, Natalie, Nelson, Jenny
Format: Article
Language:English
Subjects:
Binary organic photovoltaic blends
Eutectic solidification
Organic solar cells
Phase behavior
Photovoltaic devices
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Summary:Polymer/small molecule binaries, such as P3HT:PC61BM display eutectic phase behavior with optimum photovoltaic performance at slightly hypoeutectic compositions (with respect to polymer content). Such hypoeutectic blends readily solidify into a finely phase‐separated matrix surrounding primary crystals of the small‐molecular species. The resulting large interfacial area and component connectivity is a desirable microstructure for bulk‐heterojunction solar cells.
ISSN:0935-9648
1521-4095
DOI:10.1002/adma.200800963