A Naphthodithiophene-Diketopyrrolopyrrole Donor Molecule for Efficient Solution-Processed Solar Cells
Journal of the American Chemical Society2011Vol. 133(21), pp. 8142–8145
Citations Over TimeTop 1% of 2011 papers
Stephen Loser, Carson J. Bruns, Hiroyuki Miyauchi, Rocío Ponce Ortiz, Antonio Facchetti, Samuel I. Stupp, Tobin J. Marks
Abstract
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(61)BM, a power conversion efficiency (PCE) of 4.06 ± 0.06% is achieved-a record for a PC(61)BM-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).
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