Enhanced photocurrent and open-circuit voltage in a 3-layer cascade organic solar cell

We demonstrate a cascade architecture for organic solar cells with two planar donor/acceptor (DA) heterojunctions operating in series. In a 3-layered structure, subphthalocyanine (SubPc) acts as an ambipolar interlayer between a tetracene (Tc) donor and a C60 acceptor. The Tc/SubPc and SubPc/C60 int...

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Bibliographic Details
Published in:Applied physics letters 2012-10, Vol.101 (14)
Main Authors: Cnops, Kjell, Rand, Barry P., Cheyns, David, Heremans, Paul
Format: Article
Language:English
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Summary:We demonstrate a cascade architecture for organic solar cells with two planar donor/acceptor (DA) heterojunctions operating in series. In a 3-layered structure, subphthalocyanine (SubPc) acts as an ambipolar interlayer between a tetracene (Tc) donor and a C60 acceptor. The Tc/SubPc and SubPc/C60 interfaces are both able to contribute to the photocurrent, which results in a short-circuit current in the 3-layer cascade cell larger than in any of the constituent bi-layer DA combinations. Furthermore, the open-circuit voltage is increased due to reduced recombination losses at the DA interface.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4757575