Panchromatic aza-Bodipy based π-conjugates

A series of three aza-Bodipy donor molecules namely Aza-Bthp, Aza-Sty, and Aza-Fhdt have been synthesized. The compounds exhibit panchromatic absorption spanning approximately 280–1000 nm in solution state and possess suitable energy levels for their usefulness as donors in organic solar cells. Under optimized conditions, using PC70BM as an acceptor, power conversion efficiencies (PCE %) of 2.44, 1.12, and 2.52 were afforded for Aza-Bthp, Aza-Fhdt, and Aza-Sty respectively.