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Appl. Sci. 2017, 7(8), 844;

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

Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China
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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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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