Charge transport in MDMO-PPV:PCNEPV all-polymer solar cells
article
Charge transport properties are investigated of blends of poly [2-methoxy-5- (3′, 7′ -dimethyloctyloxy)-1,4-phenylene vinylene] (MDMO-PPV) and poly-[oxa-1,4-phenylene-(1-cyano-1,2-vinylene)-(2-methoxy-5- (3′, 7′ -dimethyloctyloxy)-1,4-phenylene)-1,2-(2-cyanovinylene)-1,4- phenylene] (PCNEPV). The hole transport in the MDMO-PPV donor phase of the 1:1 weight ratio blend is trap-free space-charge limited, with a mobility identical to the pristine polymer. The electron current in the PCNEPV acceptor phase is strongly reduced by traps that are exponentially distributed in energy. The current in MDMO-PPV:PCNEPV bulk heterojunction solar cells is therefore unbalanced and dominated by the holes in the MDMO-PPV phase. © 2007 American Institute of Physics.
Topics
TNO Identifier
280089
ISSN
00218979
Source
Journal of Applied Physics, 101(10)
Article nr.
104512
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