Issue 7, 2022

Self-assembled dipoles of o-carborane on gate oxide tuning charge carriers in organic field effect transistors

Abstract

Molecules of 12-o-carboranyldodecylphosphonic acid form a novel self-assembled monolayer (SAM) on alumina, which can effectively tune charge carriers in organic field effect transistors (OFETs) with the assembled dipoles of o-carborane at the semiconductor–dielectric interface. This SAM has not only realized p-channel OFETs of pentacene with both low threshold voltage and high field effect mobility (up to 5.2 cm2 V−1 s−1), but also enabled ambipolar charge transport in the solution-processed thin films of a chlorinated tetraazapentacene, which is a typical n-type organic semiconductor. As measured with Kelvin probe force microscopy, the SAM of CBPA has a surface electrostatic potential of −0.40 ± 0.10 V versus gold, which is in agreement with the observed shift of threshold voltage in the OFETs.

Graphical abstract: Self-assembled dipoles of o-carborane on gate oxide tuning charge carriers in organic field effect transistors

Supplementary files

Article information

Article type
Paper
Submitted
17 jun 2021
Accepted
20 aug 2021
First published
23 aug 2021

J. Mater. Chem. C, 2022,10, 2690-2695

Self-assembled dipoles of o-carborane on gate oxide tuning charge carriers in organic field effect transistors

M. Chu, J. Zhang, X. Zeng, Z. Chen, D. Liu, H. Chen, Z. Xie, J. Xu and Q. Miao, J. Mater. Chem. C, 2022, 10, 2690 DOI: 10.1039/D1TC02810C

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