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. 2017 Oct 4;139(39):13636-13639.
doi: 10.1021/jacs.7b07887. Epub 2017 Sep 20.

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

Tian-Yi Li  1 , Toni Meyer  1 , Zaifei Ma  1 , Johannes Benduhn  1 , Christian Körner  1 , Olaf Zeika  1 , Koen Vandewal  1 , Karl Leo  1
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Small Molecule Near-Infrared Boron Dipyrromethene Donors for Organic Tandem Solar Cells

Tian-Yi Li et al. J Am Chem Soc. .

Abstract

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%.

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