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Proceedings Paper

Narrow band gap conjugated polymers for emergent optoelectronic technologies
Author(s): Jason D. Azoulay; Benjamin A. Zhang; Alexander E. London
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Paper Abstract

Conjugated organic molecules effectively produce and harvest visible light and find utility in a variety of emergent optoelectronic technologies. There is currently interest in expanding the scope of these materials to extend functionality into the infrared (IR) spectral regions and endow functionality relevant in emergent technologies. Developing an understanding of the interplay between chemical and electronic structure in these systems will require control of the frontier orbital energetics (separation, position, and alignment), ground state electronic configurations, interchain arrangements, solid-state properties, and many other molecular features with synthetic precision that has yet to be demonstrated. Bridgehead imine substituted 4H-cyclopenta[2,1-b:3,4-b′]dithiophene (CPDT) structural units, in combination with strong acceptors with progressively delocalized π-systems, afford modular donor-acceptor copolymers with broad and long wavelength absorption that spans technologically relevant wavelength (λ) ranges from 0.7 < λ < 3.2 μm.1 Here we demonstrate that electronic and structural manipulation play a major role in influencing the energetics of these systems and ultimately controlling the band gap of the materials. These results bear implication in the development of very narrow band gap systems where precise control will be necessary for achieving desired properties such as interactions with longer wavelength light.

Paper Details

Date Published: 5 September 2015
PDF: 6 pages
Proc. SPIE 9564, Light Manipulating Organic Materials and Devices II, 95640D (5 September 2015); doi: 10.1117/12.2186357
Show Author Affiliations
Jason D. Azoulay, The Univ. of Southern Mississippi (United States)
Benjamin A. Zhang, The Univ. of Southern Mississippi (United States)
Alexander E. London, The Univ. of Southern Mississippi (United States)

Published in SPIE Proceedings Vol. 9564:
Light Manipulating Organic Materials and Devices II
Jon A. Schuller, Editor(s)

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