Journal of the American Chemical Society 2010-04-14

High-mobility semiconducting naphthodithiophene copolymers.

Itaru Osaka, Toru Abe, Shoji Shinamura, Eigo Miyazaki, Kazuo Takimiya

Index: J. Am. Chem. Soc. 132 , 5000, (2010)

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Abstract

We have designed and synthesized novel semiconducting polymers by introducing naphtho[1,2-b:5,6-b']dithiophene (NDT) into the polythiophene backbone. These polymers, which have a highly pi-extended heteroarene unit, achieved mobilities (>0.5 cm(2) V(-1) s(-1)) that are among the highest recorded to date for semiconducting polymers and most probably result from the highly ordered thin-film structures with crystalline close pi stacking. It is noteworthy that the choice of isomeric heteroarenes in the unit can dramatically change the physical and electronic structures and hence the OFET performance of the semiconducting polymers, even though the two isomers possess similar electronic structures; interestingly, this contrasts with the trend in small-molecule systems. We believe that these findings will give new insight into the design of new organic semiconducting materials and that the present polymers are promising materials for printable electronics.

Related Compounds

  • naphtho[1,2-b:5,6-...

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