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Issue 14, 2018
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A chrysene-based liquid crystalline semiconductor for organic thin-film transistors

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Abstract

We report the synthesis and characterization of a non-liquid crystalline material, 2-phenylchrysene (Ph-CHR), and a liquid crystalline material, 2-(4-dodecyl phenyl)chrysene (C12-Ph-CHR), and discuss their organic thin-film transistor (OTFT) device performances. The concept of designing chrysene derivatives is derived from the similar electronic structure of chrysene and [1]benzothieno[3,2-b][1]benzothiophene (BTBT), which is a very famous core for organic semiconductors. OTFTs, based on Ph-CHR and C12-Ph-CHR, are fabricated by vacuum-deposition on octyltrichlorosilane (OTS(8)) treated Si/SiO2 substrates. Our experimental results show that OTFTs based on Ph-CHR possess higher mobility than OTFTs based on BTBT derivative 2-phenyl[1]benzothieno[3,2-b][1]benzothiophene (Ph-BTBT). The liquid crystalline material C12-Ph-CHR achieves the highest carrier mobility of up to 3.07 cm2 V−1 s−1 with an on/off ratio of 3.3 × 106 for polycrystalline organic thin-film transistors in ambient air. The results indicate that the chrysene derivative C12-Ph-CHR is a promising candidate for applications in electronic devices.

Graphical abstract: A chrysene-based liquid crystalline semiconductor for organic thin-film transistors

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Article information


Submitted
07 Nov 2017
Accepted
01 Dec 2017
First published
01 Dec 2017

J. Mater. Chem. C, 2018,6, 3683-3689
Article type
Paper

A chrysene-based liquid crystalline semiconductor for organic thin-film transistors

Y. He, W. Xu, I. Murtaza, C. Yao, Y. Zhu, A. Li, C. He and H. Meng, J. Mater. Chem. C, 2018, 6, 3683
DOI: 10.1039/C7TC05063A

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