[ Instrument Network Instrument Development ] On September 9, an article published in the international top academic journal "Nature·Materials" magazine showed that Professor Zhang Xiao'an's research team at Jilin University has an important role in the field of new electrochromic materials and bistable display technology. new progress. The new polymer electrochromic materials they developed allow electronic information and images to be read statically without consuming electricity for a long time. They only consume a little power when turning pages or switching information.
At present, the mainstream mainstream display technology (liquid crystal, LED, etc.) must continue to supply power to maintain image and text information, not only consumes a lot of electricity, but also directs the human eye to the retina, which is more eye-catching. Existing electrochromic materials and technologies are still unable to meet the needs of high-end electronic display products in terms of color display, color change speed, and bistable performance.
Zhang Xiaoan team aimed at this demand and developed a new electrochromic material with excellent bistable display performance by exploring non-traditional functional bionics. In April 2019, this research was published in the journal Nature Newsletter (DOI: 10.1038/s41467-019-09556-5). Based on the "electro-acid/alkali" method proposed by the team, it showed electricity. The function of the photochromic performance of the biomimetic supramolecular material system, and the successful construction of several promising electronic devices, demonstrating its potential for fast response to electrical stimulation and power saving.
After that, the research team further designed and developed a new type of polymer electrochromic material, which has new progress, new breakthroughs, and more industrial prospects in terms of contrast, stability, and bistable performance. The potential application of multi-color bistable electrochromic devices on electronic labels (ESL) (or electronic advertising screens) on store shelves, the research results of which are "A multicolour bistable electronic shelf label based on intramolecular proton-coupled electron transfer" The title was published in the journal Nature Materials, September 1919 (Nature Materials, 2019, DOI: 10.1038/s41563-019-0471-8). The device has good overall performance, including bistable (> 52 h), reversibility (> 12,000 cycles), coloring efficiency (≥1,240 cm2C-1), transmittance change (70%), and fast switching (≤ 1.5 s).
Zhang Xiao'an team said that compared with traditional materials, the new electrochromic materials developed by the team have superior performance, and the coloring efficiency and bistable performance have exceeded the optimal values ​​of the existing similar materials, and the production process is simplified, which is beneficial to the team. Industrialization and marketization. The material also features ultra-high color contrast, excellent light transmittance and fast information switching speed, and excellent cycle reversibility. The R&D team also developed electronic displays of common colors such as black, magenta, yellow and blue to meet multi-color display needs. Since there is no glare straight into the fundus problem, the popularity of such electronic products can improve people's visual experience and alleviate eye diseases caused by long-term electronic reading.
The author believes that this super power-saving display technology is unique in that it mimics the working principle of protons and electrons in the living system and the supramolecular working principle of maintaining molecular dynamic stability, and subtly designs the reversibility of the acid-induced molecular acidity and alkalinity. Change and use this to achieve color change and sustained stability of functional dyes.
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