Organic tandem solar cells with complementary absorbing layers and a high open-circuit voltage

被引:95
作者
Cheyns, D. [1 ]
Rand, B. P. [1 ]
Heremans, P. [1 ,2 ]
机构
[1] IMEC VZW, B-3001 Leuven, Belgium
[2] Katholieke Univ Leuven, ESAT, B-3001 Louvain, Belgium
关键词
organic semiconductors; photoconductivity; semiconductor heterojunctions; solar cells; PHOTOVOLTAIC CELLS;
D O I
10.1063/1.3464169
中图分类号
O59 [应用物理学];
学科分类号
摘要
Tandem organic solar cells with peak conversion efficiencies (eta) of 5.15% are demonstrated. This is achieved by stacking two different planar heterojunction devices, each with a high open-circuit voltage (V(oc)). The phthalocyanine based donor materials in the employed subcells possess complementary absorption, a quality of critical importance to optimize photocurrent in a series connected tandem cell. The tandem structure produces V(oc) values of nearly 2 V, while fill factor remains above 60%. The measured eta corresponds to a 40% increase compared to eta of the optimal single cells. (C) 2010 American Institute of Physics. [doi:10.1063/1.3464169]
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页数:3
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