Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 10, Issue 34, Pages 29010-29018Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b09023
Keywords
flexible transparent electrode; superwettability; copper grid; ionogel; and ionic liquid
Funding
- National Natural Science Foundation of China [51541304, 51273086, 21404109, 21421061, 91127025, 21431009, 51603211, 51673107]
- National Research Fund for Fundamental Key Projects [2013CB933000, 2012CB933800]
- Key Research Program of the Chinese Academy of Sciences [KJZD-EW-M01, KJZD-EW-M03]
- 111 project [B14009]
- Special Doctorial Program Fund from the Ministry of Education of China [20130211110017]
- Youth Innovation Promotion Association, CAS [2016026]
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Production of high-performance and stable low-cost copper (Cu)-based flexible transparent electrodes (FTEs) is urgently needed for the development of new generation flexible optoelectronic devices, but it still remains challenging. Herein, we developed a facile approach to fabricate high-performance, ultra-stable Cu grid (CuG)-based FTEs by UV lithography-assisted electroless deposition of patterned Cu on flexible polyethylene terephthalate (PET), which is then encapsulated by a thin poly(1-vinyl-3-ethylimidazolium bis(trifluoromethanesulfonyl)imide) (P[VEIM][NTf2]) ionogel layer to improve the mechanical flexibility and stability. The as-prepared composite FTE (ionogel/CuG@PET) exhibits a sheet resistance of 10.9 Omega sq(-1) and optical transmittance of 90% at 550 nm. Introduction of the thin uniform P[VEIM][NTf2] ionogel nanofilm by virtue of the superwettability of the Cu layer endows the electrode with excellent mechanical flexibility and stability. This new high-performance Cu -based FTE should be an attractive alternative to indium tin oxide for practical optoelectrical applications.
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