Issue 41, 2020

Small-bandgap quinoid-based π-conjugated polymers

Abstract

Small-bandgap π-conjugated polymers are an important class of materials possessing significant potential for their broad application in organic electronics. Incorporating a quinoid structure into the polymer backbone is a powerful strategy for reducing the bandgap. Although this also leads to high-lying HOMO energy levels, resulting in unstable polymers, the use of an electron-deficient quinoid building unit can bring about low-lying HOMO energy levels, thus stabilizing the polymer against oxidation. Recent efforts in molecular design and synthesis have produced a number of fascinating small-bandgap π-conjugated polymers based on quinoid structures, many of which have shown notable performance in organic electronic devices such as transistors and solar cells. This review covers the progress in small-bandgap quinoid-based π-conjugated polymers, focusing on a variety of electron-deficient quinoid building units. We highlight the properties of each quinoid building unit and the polymers along with their structural features and device performances.

Graphical abstract: Small-bandgap quinoid-based π-conjugated polymers

Supplementary files

Article information

Article type
Review Article
Submitted
05 رجب 1441
Accepted
11 ذو القعدة 1441
First published
19 ذو القعدة 1441

J. Mater. Chem. C, 2020,8, 14262-14288

Small-bandgap quinoid-based π-conjugated polymers

T. Mikie and I. Osaka, J. Mater. Chem. C, 2020, 8, 14262 DOI: 10.1039/D0TC01041C

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