Issue 3, 2023

Oxadiazole-integrated heterocoronene discotics as ambipolar organic semiconductors

Abstract

The development of modern technologies has driven a quest for new semiconducting materials in optoelectronics, where self-assembled liquid crystal (LC) materials can play a potential role. The molecular engineering of disc-shaped LCs (DLCs) with suitable organic moieties, especially heterocyclic units, can lead to control over their columnar architecture in the nano-scale regime, which holds the key to tuning the charge-transport properties of the system. Here, we have successfully designed and synthesized room-temperature DLCs (1.1, 1.2 and 1.3) with 1,3,4-oxadiazole functional units acting as electron-deficient linkers between a central heterocoronene core and the peripheral alkoxy phenyl units. All the derivatives exhibited a broad columnar hexagonal mesophase range with high isotropic temperatures. When employed in space-charge limited current (SCLC) devices, they showed ambipolar charge transport behaviour in thin films, with maximum hole and electron mobilities of the order of 10−3 and 10−5 cm2 V−1 s−1, respectively.

Graphical abstract: Oxadiazole-integrated heterocoronene discotics as ambipolar organic semiconductors

Supplementary files

Article information

Article type
Paper
Submitted
30 Sep 2022
Accepted
08 Dec 2022
First published
13 Dec 2022

J. Mater. Chem. C, 2023,11, 980-985

Oxadiazole-integrated heterocoronene discotics as ambipolar organic semiconductors

R. De, J. De, S. P. Gupta, I. Bala, Ankita, Tarun, U. K. Pandey and S. K. Pal, J. Mater. Chem. C, 2023, 11, 980 DOI: 10.1039/D2TC04144H

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