title: Efficient organic solar cells with helical perylene diimide electron acceptors.
abstract: We report an efficiency of 6.1% for a solution-processed non-fullerene solar cell using a helical perylene diimide (PDI) dimer as the electron acceptor. Femtosecond transient absorption spectroscopy revealed both electron and hole transfer processes at the donor-acceptor interfaces, indicating that charge carriers are created from photogenerated excitons in both the electron donor and acceptor phases. Light-intensity-dependent current-voltage measurements suggested different recombination rates under short-circuit and open-circuit conditions.
authors.affiliation: The Education Ministry Key Lab of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, Optoelectronic Nano Materials and Devices Institute, Department of Chemistry, Shanghai Normal University , Shanghai 200234, China.
authors.forename: Yu
authors.initials: Y
authors.lastname: Zhong
authors.forename: M Tuan
authors.initials: MT
authors.lastname: Trinh
authors.forename: Rongsheng
authors.initials: R
authors.lastname: Chen
authors.forename: Wei
authors.initials: W
authors.lastname: Wang
authors.forename: Petr P
authors.initials: PP
authors.lastname: Khlyabich
authors.forename: Bharat
authors.initials: B
authors.lastname: Kumar
authors.forename: Qizhi
authors.initials: Q
authors.lastname: Xu
authors.forename: Chang-Yong
authors.initials: CY
authors.lastname: Nam
authors.forename: Matthew Y
authors.initials: MY
authors.lastname: Sfeir
authors.forename: Charles
authors.initials: C
authors.lastname: Black
authors.forename: Michael L
authors.initials: ML
authors.lastname: Steigerwald
authors.forename: Yueh-Lin
authors.initials: YL
authors.lastname: Loo
authors.forename: Shengxiong
authors.initials: S
authors.lastname: Xiao
authors.forename: Fay
authors.initials: F
authors.lastname: Ng
authors.forename: X-Y
authors.initials: XY
authors.lastname: Zhu
authors.forename: Colin
authors.initials: C
authors.lastname: Nuckolls