Conductive ink-jet inks for plastic electronics: Air stable copper nanoparticles and room temperature sintering

Shlomo Magdassl*, Michael Grouchko, Alexander Kamyshny

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

7 Scopus citations

Abstract

One of the greatest challenges in fabrication of plastic electronics devices by printing metallic nanoprticles is obtaining highly conductive patterns at sufficiently low temperature which will not damage the polymeric substrate. However, to date, sufficient conductivity of silver patterns was achieved only after prolonged heating at elevated temperatures, thus limiting fabrication of plastic devices only to heat resistance polymers. We report on a discovery that assemblies of silver nanoparticles, can undergo a spontaneous two-dimensional aggregation-coalescence process, even at room temperature. The surface coalescence of the metal nanoparticles leads to sintering and eventually to electrical conductivity, much below the melting temperature of the bulk silver. This process is triggered by surface charge neutralization of the nanoparticles, by using a variety of charged flocculants, and takes place in thin layers of various substrates, such as plastic and paper. The resulting high conductivity, 20% of bulk silver, enabled fabrication of various devices, as demonstrated by a flexible plastic electroluminescent ink-jet printed device.

Original languageAmerican English
Title of host publicationNIP25
Subtitle of host publication25th International Conference on Digital Printing Technologies and Digital Fabrication 2009 - Technical Program and Proceedings
Pages611-613
Number of pages3
StatePublished - 2009
EventNIP25: 25th International Conference on Digital Printing Technologies and Digital Fabrication 2009 - Louisville, KY, United States
Duration: 20 Sep 200924 Sep 2009

Publication series

NameInternational Conference on Digital Printing Technologies

Conference

ConferenceNIP25: 25th International Conference on Digital Printing Technologies and Digital Fabrication 2009
Country/TerritoryUnited States
CityLouisville, KY
Period20/09/0924/09/09

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