Journal
APPLIED PHYSICS LETTERS
Volume 99, Issue 19, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3660708
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- German Federal Ministry of Education and Research (BMBF) [03IP602]
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We present efficient, semitransparent small molecule organic solar cells. The devices employ an indium tin oxide-free top contact, consisting of thin metal films and an additional organic capping layer for enhanced light in/outcoupling. The solar cell encorporates a bulk heterojunction with the donor material Ph(2)-benz-bodipy, an infrared absorber. Combination of Ph2-benz-bodipy with C(60) as acceptor leads to devices with high open circuit voltages of up to 0.81V and short circuit current densities of 5-6 mA/cm(2), resulting in efficiences of 2.2%-2.5%. At the same time, the devices are highly transparent, with an average transmittance in the visible range (400-750 nm) of up to 47.9%, with peaks at 538nm of up to 64.2% and an average transmittance in the yellow-green range of up to 61.8%. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3660708]
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