title: Fullerene-free polymer solar cells processed from non-halogenated solvents in air with PCE of 4.8.
abstract: Progress towards practical organic solar cells amenable to large scale production is reported. Fullerene-free organic solar cells with a PCE of ∼4.8% are achieved based upon an active layer composed of the standard donor polymer PTB7-Th and a highly soluble twisted PDI acceptor tPDI-Hex. All devices can be fabricated and tested in air with 'as-cast' active layers being processed from the greener solvents o-xylene (or trimethyl benzene) or the eco-friendly and bio-derived solvent 2Me-THF without loss in efficiency.
authors.affiliation: Department of Chemistry, University of Calgary, 2500 University Drive N.W., Calgary, Alberta T2N 1N4, Canada. gregory.welch@ucalgary.ca.
authors.forename: Sergey V
authors.initials: SV
authors.lastname: Dayneko
authors.affiliation: Department of Chemistry, University of Calgary, 2500 University Drive N.W., Calgary, Alberta T2N 1N4, Canada. gregory.welch@ucalgary.ca.
authors.forename: Arthur D
authors.initials: AD
authors.lastname: Hendsbee
authors.affiliation: Department of Chemistry, University of Calgary, 2500 University Drive N.W., Calgary, Alberta T2N 1N4, Canada. gregory.welch@ucalgary.ca.
authors.forename: Gregory C
authors.identifier: http://orcid.org/0000-0002-3768-937X
authors.initials: GC
authors.lastname: Welch