Copper-based flexible transparent electrodes have broad application prospects in the field of flexible electronics due to their low price and excellent performance. The reported copper-based flexible transparent electrodes are mainly transparent electrodes based on copper nanowire networks and copper grids. In practical applications, they face two major challenges: first, the preparation process is more complicated, which is not conducive to large-scale production; second, micro-nano Copper on a scale is easily oxidized, reducing the material's electrical conductivity. These problems greatly limit the further application of copper-based transparent electrodes.
Recently, a team of Jiang Lei, a member of the Chinese Academy of Sciences and a researcher of the Institute of Physics and Chemistry Technology of the Chinese Academy of Sciences, and Liu Mingzhu, a professor at Lanzhou University, reported a copper grid flexible transparent electrode with high stability and excellent photoelectric performance. In this work, a copper grid with controllable morphology was prepared by the method of restricted area chemical deposition. The super-wetting of the ionic liquid on the copper grid was realized by adjusting the chemical structure of the ionic liquid and the microscopic morphology of the copper grid. The in-situ polymerization method successfully introduced a uniform nano-ion gel layer on the surface of the copper grid, and designed and constructed an ion-gel composite copper grid flexible transparent electrode with excellent photoelectric performance and excellent stability. This new type of ion gel composite copper grid flexible transparent electrode is simple to prepare and does not require a complicated sputtering process. At the same time, the properties of the material such as flexibility, chemical stability and adhesion to the substrate have been improved, and it is expected to replace traditional ITO. Electrodes, used in the field of flexible electronics.
Related research results were published in ACS Applied Materials & Interfaces (2018, 10, 29010-29018). Corresponding authors of the paper are Liu Hongliang, Jiang Lei, and Liu Mingzhu of Lanzhou University. The first authors of the paper are Chang Li, a doctoral student of Lanzhou University, and Zhang Xiqi, an associate researcher of the Institute of Physics and Chemistry. Relevant work has been strongly supported by the National Natural Science Foundation of China, key research projects of the Chinese Academy of Sciences, and the Youth Innovation Promotion Association of the Chinese Academy of Sciences.
Design of high-performance ion-gel composite copper grid flexible transparent electrode
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