Patterning of High-Viscosity Silver Paste by an Electrohydrodynamic-Jet Printer for Use in TFT Applications

Electrohydrodynamic (EHD) jet printing has a variety of benefits compared to conventional inkjet techniques, such as high resolution and the ability to work with high-viscosity pastes. In this work, Ag nanoparticles with 4000 cPs were chosen because they are printable on various substrates for elect...

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Bibliographic Details
Published in:Scientific reports 2019-06, Vol.9 (1), p.9180-8, Article 9180
Main Authors: Can, Thi Thu Thuy, Nguyen, Tuan Canh, Choi, Woon-Seop
Format: Article
Language:English
Subjects:
639/301/1005/1007
639/301/119/995
Electrical properties
Electronic equipment
Glass substrates
Humanities and Social Sciences
Microscopy
multidisciplinary
Nanoparticles
Science
Science (multidisciplinary)
Silver
Solvents
Viscosity
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Summary:Electrohydrodynamic (EHD) jet printing has a variety of benefits compared to conventional inkjet techniques, such as high resolution and the ability to work with high-viscosity pastes. In this work, Ag nanoparticles with 4000 cPs were chosen because they are printable on various substrates for electronic devices. The effects of additive on the high-viscosity Ag paste formulation were investigated, and pattern lines narrower than 100  μ m were achieved by EHD-jet printing with an average sheet resistance of 0.027 Ω □ −1 . Furthermore, solution-processed oxide TFTs were fabricated with EHD jet-printed Ag electrodes for the first time. The electrical properties obtained were a current ratio of 1.5 × 10 6 , a mobility of approximately 1 cm 2  V −1 s −1 , a threshold voltage of 21.5 V, and a subthreshold slope of 3.05 V dec −1 .
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-019-45504-5