Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 10, Issue 24, Pages 20748-20754Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b04007
Keywords
solution synthesis; copper nanowires; spray deposition; hot-press transfer; flexible transparent electrodes
Funding
- ETH Zurich
- Swiss National Science Foundation [20PC21_155658]
- Swiss National Science Foundation (SNF) [20PC21_155658] Funding Source: Swiss National Science Foundation (SNF)
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We report a solution-phase approach to the synthesis of crystalline copper nanowires (Cu NWs) with an aspect ratio >1000 via a new catalytic mechanism comprising copper ions. The synthesis involves the reaction between copper(II) chloride and copper(II) acetylacetonate in a mixture of oleylamine and octadecene. Reaction parameters such as the molar ratio of precursors as well as the volume ratio of solvents offer the possibility to tune the morphology of the final product. A simple low-cost spray deposition method was used to fabricate Cu NW films on a glass substrate. Posttreatment under reducing gas (5% H-2 + 95% N-2) atmosphere resulted in Cu NW films with a low sheet resistance of 24.5 Omega/sq, a transmittance of T = 71% at 550 nm (including the glass substrate), and a high oxidation resistance. Moreover, the conducting Cu NW networks on a glass substrate can easily be transferred onto a polycarbonate substrate using a simple hot-press transfer method without compromising on the electrical performance. The resulting flexible transparent electrodes show excellent flexibility (R/R-o < 1.28) upon bending to curvatures of 1 mm radius.
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