title: Poly(2,5-bis(2-octyldodecyl)-3,6-di(furan-2-yl)-2,5-dihydro-pyrrolo[3,4-c]pyrrole-1,4-dione-co-thieno[3,2-b]thiophene): a high performance polymer semiconductor for both organic thin film transistors and organic photovoltaics.
abstract: A new diketopyrrolopyrrole (DPP)-containing donor-acceptor polymer, poly(2,5-bis(2-octyldodecyl)-3,6-di(furan-2-yl)-2,5-dihydro-pyrrolo[3,4-c]pyrrole-1,4-dione-co-thieno[3,2-b]thiophene) (PDBF-co-TT), is synthesized and studied as a semiconductor in organic thin film transistors (OTFTs) and organic photovoltaics (OPVs). High hole mobility of up to 0.53 cm(2) V(-1) s(-1) in bottom-gate, top-contact OTFT devices is achieved owing to the ordered polymer chain packing and favoured chain orientation, strong intermolecular interactions, as well as uniform film morphology of PDBF-co-TT. The optimum band gap of 1.39 eV and high hole mobility make this polymer a promising donor semiconductor for the solar cell application. When paired with a fullerene acceptor, PC71BM, the resulting OPV devices show a high power conversion efficiency of up to 4.38% under simulated standard AM1.5 solar illumination.
authors.affiliation: Department of Chemical Engineering/Waterloo Institute for Nanotechnology (WIN), University of Waterloo, 200 University Ave West, Waterloo, ON, Canada, N2L 3G1. yuning.li@uwaterloo.ca.
authors.forename: Yuning
authors.initials: Y
authors.lastname: Li
authors.forename: Prashant
authors.initials: P
authors.lastname: Sonar
authors.forename: Samarendra P
authors.initials: SP
authors.lastname: Singh
authors.forename: Zi En
authors.initials: ZE
authors.lastname: Ooi
authors.forename: Erica S H
authors.initials: ES
authors.lastname: Lek
authors.forename: Melissa Q Y
authors.initials: MQ
authors.lastname: Loh