title: PDT-S-T: a new polymer with optimized molecular conformation for controlled aggregation and π-π stacking and its application in efficient photovoltaic devices.
abstract: The correlation among molecular conformation, the crystallinity of the morphology, propensity for π-π stacking, J- versus H-aggregation, and photovoltaic performance have been studied based on two newly designed polymers, PBDTTT-S-T and PDT-S-T. The results show that more linear backbone structure is helpful to improve photovoltaic properties of the polymer, and therefore, molecular conformation should be considered for molecular design of photovoltaic polymers.
authors.affiliation: State Key Laboratory of Polymer Physics and Chemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
authors.forename: Yue
authors.initials: Y
authors.lastname: Wu
authors.forename: Zhaojun
authors.initials: Z
authors.lastname: Li
authors.forename: Wei
authors.initials: W
authors.lastname: Ma
authors.forename: Ye
authors.initials: Y
authors.lastname: Huang
authors.forename: Lijun
authors.initials: L
authors.lastname: Huo
authors.forename: Xia
authors.initials: X
authors.lastname: Guo
authors.forename: Maojie
authors.initials: M
authors.lastname: Zhang
authors.forename: Harald
authors.initials: H
authors.lastname: Ade
authors.forename: Jianhui
authors.initials: J
authors.lastname: Hou
keywords: crystallinity; low bandgap polymers; molecular conformation; polymer solar cells