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Issue 40, 2020
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Band-like transporting and thermally durable V-shaped organic semiconductors with a phenyl key block

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Abstract

Towards the development of high-performance small molecule-based organic semiconductors with high carrier mobility and high thermal durability, strategic and systematic investigations are needed for not only molecular design of π-electron cores and substituents but also fundamental and structural analyses. Here, we focus on the sulphur-containing V-shaped π-electron systems with phenyl substituents and carry out comprehensive analyses of molecular assembly and charge-transport properties. Phenyl- and decyl-phenyl-substituted DNT-Vs (Ph-DNT-VW and C10Ph-DNT-VW) are readily synthesized through a versatile synthetic procedure. Single crystal data and their theoretical calculations suggested that both compounds form typical herringbone-type packing structures that are favorable for two-dimensional charge-transporting capability. Indeed, single-crystal transistors of Ph-DNT-VW and C10Ph-DNT-VW have excellent mobility of 3.1 and 8.1 cm2 V−1 s−1. Furthermore, their negative temperature coefficients of mobility strongly suggest band-like transport characteristics. Finally, solution-processed thin-film transistors of C10Ph-DNT-VW exhibit high thermal durability up to 180 °C, which is an essential feature for practical electronics.

Graphical abstract: Band-like transporting and thermally durable V-shaped organic semiconductors with a phenyl key block

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Article information


Submitted
14 Jul 2020
Accepted
14 Sep 2020
First published
22 Sep 2020

J. Mater. Chem. C, 2020,8, 14172-14179
Article type
Paper

Band-like transporting and thermally durable V-shaped organic semiconductors with a phenyl key block

C. Sawabe, S. Kumagai, M. Mitani, H. Ishii, M. Yamagishi, H. Sagayama, R. Kumai, H. Sato, J. Takeya and T. Okamoto, J. Mater. Chem. C, 2020, 8, 14172
DOI: 10.1039/D0TC03318A

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