Effect of carboxylic acids on conductivity of metallic films formed by inks based on copper@silver core-shell particles.

Citation:

Pajor-Swierzy A, Farraj Y, Kamyshny A, Magdassi S. Effect of carboxylic acids on conductivity of metallic films formed by inks based on copper@silver core-shell particles. Colloids Surf., AColloids and Surfaces, A: Physicochemical and Engineering Aspects. 2017;522 :320 - 327.

Date Published:

2017///

Abstract:

Conductive copper inks have attracted much attention as low-cost replacement for the currently used silver inks for printed electronics. The copper inks should be stable to oxidn. at all stages of fabrication of conductive patterns: ink formulation and storage, printing, and post-printing treatment. In the present study, air-stable copper-silver core-shell (Cu@Ag) submicron particles were utilized in conductive ink formulations. To improve the cond. of the resulting Cu@Ag coatings, the effect of various carboxylic acids was evaluated. It was found that all acids led to decreased resistivity after sintering at elevated temps., while the lowest value was only 4 times higher than the bulk resistivity at 3 wt% of oleic. The mechanism governing the effect of carboxylic acids is discussed, in view of possible stabilizer exchange and oxide dissoln. [on SciFinder(R)]