title: A naphthodithiophene-diketopyrrolopyrrole donor molecule for efficient solution-processed solar cells.
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).
authors.affiliation: Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, USA.
authors.forename: Stephen
authors.initials: S
authors.lastname: Loser
authors.forename: Carson J
authors.initials: CJ
authors.lastname: Bruns
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Miyauchi
authors.forename: Rocío Ponce
authors.initials: RP
authors.lastname: Ortiz
authors.forename: Antonio
authors.initials: A
authors.lastname: Facchetti
authors.forename: Samuel I
authors.initials: SI
authors.lastname: Stupp
authors.forename: Tobin J
authors.initials: TJ
authors.lastname: Marks
mesh_terms: D011211:Electric Power Supplies; D009281:Naphthalenes / Q000138:chemical synthesis / Q000737:chemistry*; D011758:Pyrroles / Q000138:chemical synthesis / Q000737:chemistry*; D012993:Solar Energy; D013876:Thiophenes / Q000138:chemical synthesis / Q000737:chemistry*
chemical_list: D009281:Naphthalenes; D011758:Pyrroles; D013876:Thiophenes