Cyclopentadithiophene based polymers—a comparison of optical, electrochemical and organic field-effect transistor characteristics

Masaki Horie; Leszek A. Majewski; Michael J. Fearn; Chin-Yang Yu; Yi Luo; Aimin Song; Brian R. Saunders; Michael L. Turner

doi:10.1039/B924126D

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Journal of Materials Chemistry

Issue 21, 2010

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Cyclopentadithiophene based polymers—a comparison of optical, electrochemical and organic field-effect transistor characteristics

Masaki Horie , Leszek A. Majewski , Michael J. Fearn , Chin-Yang Yu , Yi Luo , Aimin Song , Brian R. Saunders and Michael L. Turner

J. Mater. Chem., 2010, 20, 4347-4355

DOI: 10.1039/B924126D
Received 17 Nov 2009, Accepted 25 Mar 2010
First published on the web 20 Apr 2010

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A series of cyclopentadithiophene based polymers have been synthesized by oxidative polymerisation or palladium-catalyzed coupling reactions. Polymers have been prepared with backbones containing benzothiadiazole, benzoxadiazole, 2,2′-bithiophene, phenyl and fluorene units. The backbone structure is shown to have a large effect on the film morphology, and the optical and electrochemical properties in solution and the solid state. We show that the polymer composition can be used to tune the band gap over the entire visible spectrum. Spin-coated films of these polymers have been used as the active layer of organic field effect transistors and hole mobilities up to 3.7 × 10⁻³ cm² V⁻¹ s⁻¹ have been measured under ambient conditions.

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Results of XRD, DSC and AFM of polymers.
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Masaki Horie
Leszek A. Majewski
Michael J. Fearn
Chin-Yang Yu
Yi Luo
Aimin Song
Brian R. Saunders
Michael L. Turner

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Journal of Materials Chemistry

Cyclopentadithiophene based polymers—a comparison of optical, electrochemical and organic field-effect transistor characteristics

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