Due to its low price and excellent performance, copper-based flexible transparent electrodes have broad application prospects in the field of flexible electronics. The copper-based flexible transparent electrodes have been reported to be mainly based on copper nanowire networks and transparent grids of copper grids. There are two main problems in the process: First, the preparation process is more complicated, which is not conducive to large-scale production. Second, the micro-nano scale copper is easily oxidized and reduces the electrical conductivity of the material. These problems greatly limit the further development of copper-based transparent electrodes. application.
Recently, Jiang Lei, a member of the Chinese Academy of Sciences and a researcher at the Institute of Physics and Chemistry 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 optoelectronic properties. A copper grid with controlled morphology was prepared by the deposition method. 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, and further succeeded in the in-situ polymerization method. A uniform nano-ion gel layer is introduced on the surface of the copper mesh to design an ion-gel composite copper mesh flexible transparent electrode with excellent photoelectric performance and excellent stability. This new type of ion-gel composite copper mesh flexible transparent electrode The preparation process is simple, no complicated sputtering process is required, and the properties of the material, the chemical stability and the bonding force with the substrate are improved, and it is expected to replace the traditional ITO electrode and be applied to the field of flexible electronics.
Relevant research results were published in ACS Applied Materials & Interfaces (2018, 10, 29010-29018). The authors of the paper are Liu Hongliang, Jiang Li and Liu Mingzhu of Lanzhou University. The first author of the thesis is Changli He, Ph.D. student of Lanzhou University. Zhang Xiqi, associate researcher of the Institute of Physics and Chemistry. Relevant work received strong support from the National Natural Science Foundation of China, the Chinese Academy of Sciences Key Research Project, and the Chinese Academy of Sciences Youth Innovation Promotion Association.
Design of high performance ion gel composite copper grid flexible transparent electrode
