Issue 10, 2022

Ambipolar to unipolar irreversible switching in nanosheet transistors: the role of ferrocene in fullerene/ferrocene nanosheets

Abstract

Recently, cocrystals containing organic donors and acceptors have been explored as active elements in organic field-effect transistors (FETs). Herein, we report the ambipolar charge transport properties of C60/ferrocene (C60/Fc) single cocrystal nanosheets. Upon heating to 150 °C, the ambipolar triclinic C60/Fc nanosheet FETs were converted to n-type face-centered cubic C60 nanosheet FETs due to the loss of ferrocene with void formation. This thermally induced transition of the crystal structure is accompanied by an irreversible switching of the semiconducting properties of the device from ambipolar to unipolar. We also elucidated the importance of the Fc for the charge transfer properties of the nanosheets using photoemission yield spectroscopy in air and theoretical calculations.

Graphical abstract: Ambipolar to unipolar irreversible switching in nanosheet transistors: the role of ferrocene in fullerene/ferrocene nanosheets

Supplementary files

Article information

Article type
Paper
Submitted
17 Nov 2021
Accepted
03 Feb 2022
First published
06 Feb 2022

J. Mater. Chem. C, 2022,10, 3770-3774

Ambipolar to unipolar irreversible switching in nanosheet transistors: the role of ferrocene in fullerene/ferrocene nanosheets

D. Mahdaoui, C. Hirata, K. Nagaoka, K. Miyazawa, K. Fujii, T. Ando, M. Abderrabba, O. Ito, M. Takagi, T. Ishimoto, M. Tachikawa, S. Yagyu, Y. Liu, Y. Nakajima, Y. Nemoto, K. Tsukagoshi and T. Wakahara, J. Mater. Chem. C, 2022, 10, 3770 DOI: 10.1039/D1TC05545C

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