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Issue 4, 2011
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Synthesis, characterization and photovoltaic properties of poly(thiophenevinylene-alt-benzobisoxazole)s

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Abstract

Herein we report the synthesis of two solution processible, conjugated polymers containing the benzobisoxazole moiety. The polymers were characterized using 1H NMR, UV-Vis and fluorescence spectroscopy. Thermal gravimetric analysis shows that the polymers do not exhibit significant weight loss until approximately 300 °C under nitrogen. Cyclic voltammetry shows that the polymers have reversible reduction waves with estimated LUMO levels at −3.02 and −3.10 eV relative to vacuum and optical bandgaps of 2.04–2.17 eV. Devices based on blends of the copolymers and [6,6]-phenyl C61 butyric acid methyl ester (PCBM) exhibited modest power conversion efficiencies. Theoretical models reveal that there is poor electron delocalization along the polymer backbone, leading to poor performance. However, the energy levels of these polymers indicate that the incorporation of benzobisoxazoles into the polymer backbone is a promising strategy for the synthesis of new materials.

Graphical abstract: Synthesis, characterization and photovoltaic properties of poly(thiophenevinylene-alt-benzobisoxazole)s

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Article information


Submitted
26 Apr 2010
Accepted
21 Oct 2010
First published
16 Nov 2010

Phys. Chem. Chem. Phys., 2011,13, 1338-1344
Article type
Paper

Synthesis, characterization and photovoltaic properties of poly(thiophenevinylene-alt-benzobisoxazole)s

J. F. Mike, K. Nalwa, A. J. Makowski, D. Putnam, A. L. Tomlinson, S. Chaudhary and M. Jeffries-EL, Phys. Chem. Chem. Phys., 2011, 13, 1338
DOI: 10.1039/C0CP00353K

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