We report the synthesis, characterization, and first implementation of a naphtho[2,3-b:6,7-b′]dithiophene (NDT)-based donor molecule in highly efficient organic photovoltaics (OPVs). When NDT(TDPP) 2 (TDPP = thiophene-capped diketopyrrolopyrrole) is combined with the electron acceptor PC 61BM, a power conversion efficiency (PCE) of 4.06 ± 0.06% is achieved - a record for a PC 61BM-based small-molecule OPV. The substantial PCE is attributed to the broad, high oscillator strength visible absorption, the ordered molecular packing, and an exceptional hole mobility of NDT(TDPP) 2.
ASJC Scopus subject areas
- Colloid and Surface Chemistry