3 years ago

Small Molecule Near-Infrared Boron Dipyrromethene Donors for Organic Tandem Solar Cells

Small Molecule Near-Infrared Boron Dipyrromethene Donors for Organic Tandem Solar Cells
Zaifei Ma, Tian-yi Li, Karl Leo, Christian Körner, Toni Meyer, Koen Vandewal, Olaf Zeika, Johannes Benduhn
Three furan fused boron dipyrromethenes (BODIPYs) with a CF3 group on the meso-carbon are synthesized as near-infrared absorbing materials for vacuum processable organic solar cells. The best single junction device reaches a short-circuit current (jsc) of 13.3 mA cm–2 and a power conversion efficiency (PCE) of 6.1%. These values are highly promising for an electron donor material with an absorption onset beyond 900 nm. In a tandem solar cell comprising a NIR BODIPY subcell and a matching “green” absorber subcell, complementary absorption is achieved, resulting in PCE of ∼10%.

Publisher URL: http://dx.doi.org/10.1021/jacs.7b07887

DOI: 10.1021/jacs.7b07887

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