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Nano Research 2022, 15(2): 858-863 https://doi.org/10.1007/s12274-021-3563-0
Research Article | Issue | Published: 14 July 2021

Solution-processed top-contact electrodes strategy for organic crystalline field-effect transistor arrays

Show Author's Information Xi Zhang1,2,  Xiaotong Zhao1,  Limei Rao1,  Jing Zhang1,  Mingchao Xiao1,  Danlei Zhu1,  Chunlei Li1,  Xiaosong Shi1,  Jie Liu1,  Jie Liu1( ),  Lang Jiang1( )
Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic SolidsInstitute of Chemistry, Chinese Academy of SciencesBeijing100190China
University of the Chinese Academy of SciencesBeijing100049China
Keywords:
organic field-effect transistors, solution processed electrodes, top contact, organic crystalline thin films
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Zhang X, Zhao X, Rao L, et al. Solution-processed top-contact electrodes strategy for organic crystalline field-effect transistor arrays. Nano Research, 2022, 15(2): 858-863. https://doi.org/10.1007/s12274-021-3563-0
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Abstract Full text Electronic supplementary material About this article

Organic crystals, especially ultra-thin two-dimensional (2D) ones such as monolayer molecular crystals, are fragile and vulnerable to traditional vacuum deposition. Up to now, most of the methods reported for fabricating organic field-effect transistors (OFETs) with top-electrodes on the 2D molecular crystals are based on mechanical-transfer method. Nondestructive method for large scale in-situ electrode deposition is urgent. In this work, the silver mirror reaction (SMR) is introduced to construct top-contact electrodes on 2D organic crystalline thin films. OFETs based on bilayer crystalline films with solution-processed silver electrodes show comparable performance to devices with transferred gold electrodes. In addition to that, OFETs with SMR fabricated silver electrodes show lower contact resistance than the ones with evaporated silver electrodes. Furthermore, the temperature under which SMR electrodes annealed is relatively low (60 ℃), making this approach applicable to varies of organic semiconductors, such as spin-coated polymer films, vacuum evaporated films, 2D and even monolayer crystalline films. Besides, OFETs with sub-micrometer channel width and 25 μm channel length are realized which might find practical application in the ultra-small pixel mini/micro-LEDs.


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Electronic supplementary material
About this article

Solution-processed top-contact electrodes strategy for organic crystalline field-effect transistor arrays

Show Author's information Xi Zhang1,2, Xiaotong Zhao1, Limei Rao1, Jing Zhang1, Mingchao Xiao1, Danlei Zhu1, Chunlei Li1, Xiaosong Shi1, Jie Liu1, Jie Liu1( ), Lang Jiang1( )
Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic SolidsInstitute of Chemistry, Chinese Academy of SciencesBeijing100190China
University of the Chinese Academy of SciencesBeijing100049China

Abstract

Organic crystals, especially ultra-thin two-dimensional (2D) ones such as monolayer molecular crystals, are fragile and vulnerable to traditional vacuum deposition. Up to now, most of the methods reported for fabricating organic field-effect transistors (OFETs) with top-electrodes on the 2D molecular crystals are based on mechanical-transfer method. Nondestructive method for large scale in-situ electrode deposition is urgent. In this work, the silver mirror reaction (SMR) is introduced to construct top-contact electrodes on 2D organic crystalline thin films. OFETs based on bilayer crystalline films with solution-processed silver electrodes show comparable performance to devices with transferred gold electrodes. In addition to that, OFETs with SMR fabricated silver electrodes show lower contact resistance than the ones with evaporated silver electrodes. Furthermore, the temperature under which SMR electrodes annealed is relatively low (60 ℃), making this approach applicable to varies of organic semiconductors, such as spin-coated polymer films, vacuum evaporated films, 2D and even monolayer crystalline films. Besides, OFETs with sub-micrometer channel width and 25 μm channel length are realized which might find practical application in the ultra-small pixel mini/micro-LEDs.

Keywords: organic field-effect transistors, solution processed electrodes, top contact, organic crystalline thin films

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Publication history
Copyright
Acknowledgements

Publication history

Received: 05 March 2021
Revised: 25 April 2021
Accepted: 01 May 2021
Published: 14 July 2021
Issue date: February 2022

Copyright

© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2021

Acknowledgements

Acknowledgements

This work was supported by the Ministry of Science and Technology of China (Nos. 2017YFA0204704 and 2016YFB0401100), the National Natural Science Foundation of China (Nos. 21805284 and 21873108), the Chinese Academy of Sciences (Hundred Talents Plan), the China Postdoctoral Science Foundation funded project (No. 2019M660807), and the Strategic Priority Research Program (No. XDB30000000).

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