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Cyclopentadithiophene–naphthalenediimide polymers; synthesis, characterisation, and n-type semiconducting properties in field-effect transistors and photovoltaic devices

Li, C-H. and Kettle, J. and Horie, M. (2014) Cyclopentadithiophene–naphthalenediimide polymers; synthesis, characterisation, and n-type semiconducting properties in field-effect transistors and photovoltaic devices. Materials Chemistry and Physics, 144 ((3)). pp. 519-528. DOI: 10.1016/j.matchemphys.2014.01.029

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Abstract

The synthesis, characterisation, and device performance of a series of cyclopentadithiophene (CPDT)-naphthalenediimide (NDI) donor-acceptor-donor (D-A-D) polymers is reported. The monomers with various alkyl chains are synthesised via direct arylation using palladium complex catalyst. The monomers are then polymerised by oxidative polymerisation using FeCl3 to provide high molecular weight polymers (Mn = 21,800�76,000). The polymer films show deep-red absorption including near-infrared region up to 1100 nm to give optical bandgap of approximately 1.16 eV. The polymers exhibit only n-type semiconducting properties giving the highest electron mobility of 9 � 10-3 cm2 V�1 s�1 in organic field-effect transistors (OFETs). Organic photovoltaic (OPV) devices are fabricated from solutions of the polymers as acceptors and poly(3-hexylthiophene) (P3HT) as a donor.

Item Type: Article
Subjects: Research Publications
Departments: College of Physical and Applied Sciences > School of Electronic Engineering
Date Deposited: 09 Dec 2014 16:31
Last Modified: 16 Feb 2016 03:46
ISSN: 0254-0584
URI: http://e.bangor.ac.uk/id/eprint/365
Identification Number: DOI: 10.1016/j.matchemphys.2014.01.029
Publisher: Elsevier
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