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Appl. Sci. 2017, 7(8), 844; doi:10.3390/app7080844

Amorphous InGaZnO Thin Film Transistor Fabricated with Printed Silver Salt Ink Source/Drain Electrodes

1
Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China
2
Guangdong Fenghua Advanced Technology Holding Co., Ltd., Zhaoqing 526060, China
*
Authors to whom correspondence should be addressed.
Received: 25 June 2017 / Revised: 9 August 2017 / Accepted: 14 August 2017 / Published: 16 August 2017
(This article belongs to the Special Issue Thin-Film Transistors)
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Abstract

Recently, amorphous indium-gallium-zinc-oxide thin film transistors (a-IGZO TFTs) with inkjet printing silver source/drain electrodes have attracted great attention, especially for large area and flexible electronics applications. The silver ink could be divided into two types: one is based on silver nanoparticles, and the other is silver salt ink. Organic materials are essential in the formulation of nanoparticle ink as a strong disperse stabilizer to prevent agglomeration of silver particles, but will introduce contact problems between the silver electrodes and the a-IGZO active layer after annealing, which is difficult to eliminate and leads to poor device properties. Our experiment is aimed to reduce this effect by using a silver salt ink without stabilizer component. With optimized inkjet printing conditions, the high performance of a-IGZO TFT was obtained with a mobility of 4.28 cm2/V·s and an on/off current ratio over 106. The results have demonstrated a significant improvement for a-IGZO TFTs with directly printed silver electrodes. This work presents a promising platform for future printed electronic applications. View Full-Text
Keywords: a-IGZO TFTs; inkjet printing; source/drain electrodes; silver salt ink a-IGZO TFTs; inkjet printing; source/drain electrodes; silver salt ink
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Yang, C.; Fang, Z.; Ning, H.; Tao, R.; Chen, J.; Zhou, Y.; Zheng, Z.; Yao, R.; Wang, L.; Peng, J.; Song, Y. Amorphous InGaZnO Thin Film Transistor Fabricated with Printed Silver Salt Ink Source/Drain Electrodes. Appl. Sci. 2017, 7, 844.

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