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ECN publication
Photovoltaic properties of a conjugated polymer blend of MDMO - PPV and PCNEPV
Veenstra, S.C.; Verhees, W.J.H.; Kroon, J.M.; Koetse, M.M.; Sweelssen, J.; Bastiaansen, J.J.A.M.; Schoo, H.F.M.; Yang, X.; Alexeev, A.; Loos, J.; Schubert, U.S.; Wienk, M.M.
Published by: Publication date:
ECN Solar Energy 1-11-2004
ECN report number: Document type:
ECN-RX--04-118 Article (scientific)
Number of pages:

Published in: Chemistry of Materials (American Chemical Society), , 2004, Vol.16, p.2503-2508.


Photovoltaic properties of solution-processed semiconducting polymer blends have been

studied. It is demonstrated that photoinduced charge transfer occurs in binary mixtures of

poly[2-methoxy-5-(3,7-dimethyloctyloxy)-1,4-phenylenevinylene] (MDMO-PPV) and poly-


1,2-(2-cyanovinylene)-1,4-phenylene] (PCNEPV). Further, it is shown that the photovoltaic

performance is improved by a thermal treatment which alters the morphology of the

photoactive layer. The temperature necessary to achieve the enhanced performance is related

to transition temperatures of the pure polymers. Device optimization yields solar cells with

a power conversion efficiency of 0.75% under standard test conditions (AM 1.5, 1000 W/m2).

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