A Naphthodithiophene-Diketopyrrolopyrrole Donor Molecule for Efficient Solution-Processed Solar Cells
作者:Stephen Loser、Carson J. Bruns、Hiroyuki Miyauchi、Rocío Ponce Ortiz、Antonio Facchetti、Samuel I. Stupp、Tobin J. Marks
DOI:10.1021/ja202791n
日期:2011.6.1
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 PC61BM, a power conversion efficiency (PCE) of 4.06 +/- 0.06% is achieved-a record for a PC61BM-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).