Importance of C(2) 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 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.
Corning Incorporated, SP-FR-6, Corning, NY 14830, USA.
Mingqian
M
He
Jianfeng
J
Li
Adama
A
Tandia
Michael
M
Sorensen
Feixia
F
Zhang
Hon Hang
HH
Fong
Vladimir A
VA
Pozdin
Detlef-M
DM
Smilgies
George G
GG
Malliaras