Effect of carboxylic acid on sintering of inkjet-printed copper nanoparticulate films

Kyoohee Woo, Youngwoo Kim, Byungyoon Lee, Jonghee Kim, Jooho Moon

Research output: Contribution to journalArticle

70 Citations (Scopus)

Abstract

The reduction effect of various carboxylic acids on inkjet-printed copper film was investigated. Carboxylic acids were exposed to the film by nitrogen gas that was bubbled through the liquid acids during the annealing process. It was observed that in the case of saturated monocarboxylic acid (formic, acetic, propionic, butyric), the acids with shorter hydrocarbon chains perform better in reducing the surface copper oxides in the printed copper conductive film. The printed films exposed to formic acid vapor exhibited the lowest resistivity (3.10 and 2.30 μω cm when annealed at 200 and 250 °C, respectively). In addition, the oxalic acid more effectively reduces copper oxide than formic acid and its usage can shorten the annealing time for highly conductive printed copper film. This reductive annealing process allows fabrication of copper patterns with low resistivity, (3.82 μω cm annealed at 250 °C) comparable to the resistivity of bulk copper.

Original languageEnglish
Pages (from-to)2377-2382
Number of pages6
JournalACS Applied Materials and Interfaces
Volume3
Issue number7
DOIs
Publication statusPublished - 2011 Jul 27

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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