Open AccessNear-infrared absorbing semitransparent organic solar cells
Author(s) -
Jan Meiss,
Felix Holzmueller,
Roland Gresser,
Karl Leo,
Moritz Riede
Publication year - 2011
Publication title -
applied physics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 442
eISSN - 1077-3118
pISSN - 0003-6951
DOI - 10.1063/1.3660708
Subject(s) - transmittance , optoelectronics , materials science , organic solar cell , indium tin oxide , infrared , acceptor , solar cell , thin film , heterojunction , open circuit voltage , short circuit , optics , voltage , nanotechnology , polymer , physics , quantum mechanics , composite material , condensed matter physics
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 Ph2-benz-bodipy, an infrared absorber. Combination of Ph2-benz-bodipy with C60 as acceptor leads to devices with high open circuit voltages of up to 0.81 V and short circuit current densities of 5–6 mA/cm2, 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 538 nm of up to 64.2% and an average transmittance in the yellow-green range of up to 61.8%. © 2011 American Institute of Physics.
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