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ACS Appl Mater Interfaces. 2014 Mar 12;6(5):3312-9. doi: 10.1021/am4036306. Epub 2014 Feb 18.

A self-reducible and alcohol-soluble copper-based metal-organic decomposition ink for printed electronics.

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1
Program in Nano Science and Technology, Graduate School of Convergence Science and Technology, Seoul National University , Suwon 443-270, Republic of Korea.

Abstract

We report a novel method for the synthesis of a self-reducible (thermally reducible without a reducing atmosphere) and alcohol-soluble copper-based metal-organic decomposition (MOD) ink for printed electronics. Alcohol-solvent-based conductive inks are necessary for commercial printing processes such as reverse offset printing. We selected copper(II) formate as a precursor and alkanolamine (2-amino-2-methyl-1-propanol) as a ligand to make an alcohol-solvent-based conductive ink and to assist in the reduction reaction of copper(II) formate. In addition, a co-complexing agent (octylamine) and a sintering helper (hexanoic acid) were introduced to improve the metallic copper film. The specific resistivity of copper-based MOD ink (Cuf-AMP-OH ink) after heat treatment at 350 °C is 9.46 μΩ·cm, which is 5.5 times higher than the specific resistivity of bulk copper. A simple stamping transfer was conducted to demonstrate the potential of our ink for commercial printing processes.

PMID:
24512011
DOI:
10.1021/am4036306
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