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1. (WO2018140226) CONDUCTIVE CORE-SHELL METAL NANOWIRES FOR TRANSPARENT CONDUCTORS

Pub. No.:    WO/2018/140226    International Application No.:    PCT/US2018/013006
Publication Date: Fri Aug 03 01:59:59 CEST 2018 International Filing Date: Wed Jan 10 00:59:59 CET 2018
IPC: H01B 5/00
H01B 1/02
H01L 25/16
Applicants: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
Inventors: YANG, Peidong
NIU, Zhiqiang
CUI, Fan
Title: CONDUCTIVE CORE-SHELL METAL NANOWIRES FOR TRANSPARENT CONDUCTORS
Abstract:
Conductive core-shell metal nanowires that can be synthesized using a solution-based method can be used to construct transparent and flexible conductors with low cost in large scales. Noble metals, including Au, Ag, and Pt, can be formed (e.g., epitaxially) on the surface of ultra-thin metal (e.g., Cu) nanowires as a shell (e.g., a conformal shell) with tunable thickness, for example, in the range of about 1 to 3 nm. Transparent conducting films fabricated using colloidal suspensions of the core- shell nanowires exhibit excellent conductivity and comparable haze factors compared to the parent uncoated metal nanowires. The presence of conformal and epitaxial noble-metal shells has been found to significantly improve the film stability under air and humidity exposure at elevated temperature. Transparent electrodes formed from these transparent conducting films find use in numerous optoelectronic devices such as touch panels, displays, photovoltaic devices, and electrochromic windows.