Journal
APPLIED PHYSICS LETTERS
Volume 99, Issue 4, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3610551
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- German Federal Ministry of Education and Research (BMBF) [03IP602]
- OPEG [13N9716]
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We present highly efficient, semitransparent small molecule organic solar cells. The devices employ an indium tin oxide-free top contact, consisting of thin metal films. An additional organic layer is used to enhance light outcoupling. The solar cell incorporates two stacked subcells, each containing a donor: acceptor bulk heterojunction. The two subcells have complementary absorbers, with separate blue (C-60), red (fluorinated zinc phthalocyanine), and green (dicyanovinyl oligothiophene derivative) absorbing molecules. A power conversion efficiency of 4.9 +/- 0.2% is obtained for the device having an average transmission of 24% in the visible range. (C) 2011 American Institute of Physics. [doi:10.1063/1.3610551]
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