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Pulsed laser deposition film of a donor-acceptor-donor polymer as possible active layer in devices

Ranjith, K and Swathi, SK and Kumar, Prajwal and Ramamurthy, Praveen C (2011) Pulsed laser deposition film of a donor-acceptor-donor polymer as possible active layer in devices. In: Journal of Materials Science (full set), 46 (7). pp. 2259-2266.

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Abstract

A molecule having a ketone group between two thiophene groups was synthesized. Presence of alternating electron donating and accepting moieties gives this material a donor-acceptor-donor (DAD) architecture. PolyDAD was synthesized from DAD monomer by oxidative polymerization. Device quality films of polyDAD were fabricated using pulsed laser deposition technique. X-ray photoelectron spectroscopy (XPS) and fourier transform infrared spectra (FTIR) data of both as synthesized and film indicate the material does not degrade during ablation. Optical band gap was determined to be about 1.45 eV. Four orders of magnitude increase in conductivity was observed from as synthesized to pulsed laser deposition (PLD) fabricated film of polyDAD. Annealing of polyDAD films increase conductivity, indicating better ordering of the molecules upon heating. Rectifying devices were fabricated from polyDAD, and preliminary results are discussed.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Springer.
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Depositing User: Id for Latest eprints
Date Deposited: 07 Apr 2011 06:42
Last Modified: 07 Apr 2011 06:42
URI: http://eprints.iisc.ac.in/id/eprint/36009

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