PDT-S-T: A New Polymer with Optimized Molecular Conformation for Controlled Aggregation and π-π Stacking and Its Application in Efficient Photovoltaic Devices

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 i...

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Bibliographic Details
Published in:Advanced materials (Weinheim) 2013-07, Vol.25 (25), p.3449-3455
Main Authors: Wu, Yue, Li, Zhaojun, Ma, Wei, Huang, Ye, Huo, Lijun, Guo, Xia, Zhang, Maojie, Ade, Harald, Hou, Jianhui
Format: Article
Language:English
Subjects:
Agglomeration
Crystallinity
Devices
low bandgap polymers
Molecular conformation
Molecular structure
Photovoltaic cells
polymer solar cells
Solar cells
Stacking
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Summary: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.
ISSN:0935-9648
1521-4095
DOI:10.1002/adma.201301174