Issue 30, 2024

Chemical vapor deposition of high charge carrier mobility benzothiadiazole-based conjugated polymer thin films

Abstract

Low band gap benzothiadiazole–oligothiophene conjugated polymer thin films are prepared using oxidative chemical vapor deposition (oCVD). The synthesis and deposition occur simultaneously from the gas phase in oCVD; no solubilizing groups are attached to the benzothiadiazole or thienyl moieties, which allows molecular packing and charge carrier mobility to increase. Moreover, oCVD, which is a solventless, scalable and substrate independent approach, readily leads to the formation of dense and low surface roughness benzothiadiazole–oligothiophene conjugated polymer thin films. Polymerization yield, doping and conductivity of the benzothiadiazole–oligothiophene conjugated polymers are shown to be strongly influenced by the oxidant-to-monomer ratio. Interestingly, benzothiadiazole–oligothiophene conjugated polymer thin films synthesized by oCVD exhibit hole mobilities up to 4.0 cm2 V−1 s−1, surpassing those of previously reported benzothiadiazole–oligothiophene conjugated polymers prepared by spin-coating, dip-coating and drop casting.

Graphical abstract: Chemical vapor deposition of high charge carrier mobility benzothiadiazole-based conjugated polymer thin films

Supplementary files

Article information

Article type
Paper
Submitted
07 Apr 2024
Accepted
17 Jun 2024
First published
04 Jul 2024
This article is Open Access
Creative Commons BY license

J. Mater. Chem. C, 2024,12, 11368-11377

Chemical vapor deposition of high charge carrier mobility benzothiadiazole-based conjugated polymer thin films

M. K. Charyton, J. Crêpellière, K. Kotwica, M. Gora, W. Le, G. Frache, P. Grysan, J. Guillot, K. Baba and N. D. Boscher, J. Mater. Chem. C, 2024, 12, 11368 DOI: 10.1039/D4TC01437E

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