Aza-BODIPY dyes with heterocyclic substituents and their derivatives bearing a cyanide co-ligand: NIR donor materials for vacuum-processed solar cells

Abstract

Aza-BODIPY dyes with heterocyclic substituents and their derivatives with an asymmetric BF(CN) moiety were synthesized via a modified route using organolithium reagents. As strong NIR absorbers, the vacuum processed BHJ solar cell with an aza-BODIPY donor and a C₆₀ acceptor achieved a PCE of 3%.