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Structure vs. Property relationship in high mobility fused thiophene polymers
Authors
,
HH Fong
+7 more
M He
J Li
GG Malliaras
VA Pozdin
DM Smilgies
ML Sorensen
F Zhang
Publication date
1 December 2009
Publisher
Abstract
A family of conjugated polymers with fused structures consisting of three to five thiophene rings and with the same alkyl side chains has been synthesized as a means to understand structure - property relationships. All three polymers showed well extended conjugation through the polymer backbone. X-ray diffraction study of the polymer thin films suggests that the polymer with the even number of fused thiophene rings forms a tight crystalline structure due to its tilted side chain arrangement. On the other hand, the polymers with the odd number of fused thiophene rings packed more loosely. Characterization in a field-effect transistor configuration showed that the mobility of the polymer with the even number of rings is one order of magnitude higher than its odd-numbered counterparts. Through this structure - property study, we demonstrate that proper design of the molecules and properly arranged side chain positions on the polymer backbone can greatly enhance polymer electronic properties. © 2009 SPIE
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CUED - Cambridge University Engineering Department
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Last time updated on 15/07/2020