Importance of C2 symmetry for the device performance of a newly synthesized family of fused-ring thiophenes

We investigated the relationship between molecular structure and field-effect hole mobility in a family of fused-ring polythiophene copolymers that we designed recently. The results suggest that a repeat unit that possesses a C 2 axis perpendicular to the conjugation plane is important to achieve a...

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Bibliographic Details
Published in:Chemistry of materials 2010-03, Vol.22 (9), p.2770-2779
Main Authors: He, Mingqian, Li, Jianfeng, Tandia, Adama, Sorensen, Michael, Zhang, Feixia, Fong, Hon Hang, Pozdin, Vladimir A., Smilgies, Detlef-M., Malliaras, George G.
Format: Article
Language:English
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Summary:We investigated the relationship between molecular structure and field-effect hole mobility in a family of fused-ring polythiophene copolymers that we designed recently. The results suggest that a repeat unit that possesses a C 2 axis perpendicular to the conjugation plane is important to achieve a high-mobility. Our finding is supported by a review of literature data: Many polymer semiconductors showing a hole or electron mobility >0.1 cm 2 /V·s feature a repeat unit with C 2 symmetry; however exceptions have been found from some push – pull polymer structures.
ISSN:0897-4756
DOI:10.1021/cm100524p