Issue 12, 2021

Structural influence of a dichalcogenopheno-1,3,4-chalcogenodiazole comonomer on the optoelectronic properties of diketopyrrolopyrrole-based conjugated polymers

Abstract

We designed, synthesized, and characterized four conjugated polymers (PDPP-T-Odz, PDPP-T-Tdz, PDPP-Se-Odz, and PDPP-Se-Tdz) that are composed of electron-deficient dichalcogenopheno-1,3,4-chalcogenodiazole planar subunits, which show a wide range of UV-Vis-NIR light absorption. A comparison of the characteristics of these polymers that have different spacer units and chalcogen atomic substitutions revealed that the selenophene spacer boosts the hole and electron mobilities, and that the chalcogen atomic substitutions affect the polarity of the charge carriers. As a result, polymer transistors based on polymers that incorporate selenophene spacers showed hole and electron mobilities of up to 0.04 and 0.03 cm2 Vāˆ’1 sāˆ’1, respectively. These results suggest that the diselenopheno-1,3,4-oxadiazole and diselenopheno-1,3,4-thiadiazole units are promising building blocks to achieve high-performance optoelectronic materials that have high carrier mobility.

Graphical abstract: Structural influence of a dichalcogenopheno-1,3,4-chalcogenodiazole comonomer on the optoelectronic properties of diketopyrrolopyrrole-based conjugated polymers

Supplementary files

Article information

Article type
Paper
Submitted
16 Dec 2020
Accepted
28 Jan 2021
First published
12 Feb 2021

Polym. Chem., 2021,12, 1758-1767

Structural influence of a dichalcogenopheno-1,3,4-chalcogenodiazole comonomer on the optoelectronic properties of diketopyrrolopyrrole-based conjugated polymers

B. Kang, Y. S. Lee, J. Hwa, Z. Dongbo, K. Cho and Y. Kim, Polym. Chem., 2021, 12, 1758 DOI: 10.1039/D0PY01710H

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