3 years ago

Enhanced Oxidation-Resistant Cu@Ni Core–Shell Nanoparticles for Printed Flexible Electrodes

Enhanced
Oxidation-Resistant Cu@Ni Core–Shell Nanoparticles for Printed
Flexible Electrodes
Su Yeon Lee, Youngmin Choi, Sunho Jeong, Tae Gon Kim, Hye Jin Park, Kyoohee Woo
In this work, the fabrication and application of highly conductive, robust, flexible, and oxidation-resistant Cu–Ni core–shell nanoparticle (NP)-based electrodes have been reported. Cu@Ni core–shell NPs with a tunable Ni shell thickness were synthesized by varying the Cu/Ni molar ratios in the precursor solution. Through continuous spray coating and flash photonic sintering without an inert atmosphere, large-area Cu@Ni NP-based conductors were fabricated on various polymer substrates. These NP-based electrodes demonstrate a low sheet resistance of 1.3 Ω sq–1 under an optical energy dose of 1.5 J cm–2. In addition, they exhibit highly stable sheet resistances (ΔR/R0 < 1) even after 30 days of aging at 85 °C and 85% relative humidity. Further, a flexible heater fabricated from the Cu@Ni film is demonstrated, which shows uniform heat distribution and stable temperature compared to those of a pure Cu film.

Publisher URL: http://dx.doi.org/10.1021/acsami.7b14572

DOI: 10.1021/acsami.7b14572

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