Flexible Reflectance-type Electrochromic Devices Based on Cr/Ag/WO3 Thin Films

发光学报 Pub Date : 2023-01-01 DOI:10.37188/cjl.20230113

Jingyu Yan, Ying Lyu, Shengze Li, B. Liu, Pan Li, Kaixiao Xing, Xingyuan Liu

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引用次数: 0

Abstract

： Flexible reflective electrochromic devices have broad application prospects in e - paper displays ， camou⁃ flage ， and intelligent color - changing surfaces ， but there are still problems such as poor flexibility ， low optical con⁃ trast ， and poor stability. Indium - free reflective electrochromic electrodes with Cr/Ag/WO 3 （ CAW ） structure have been prepared by electron beam evaporation on glass and flexible PET substrates. CAW films have high reflectance and low surface resistance. The average visible light reflectance is up to 89. 2% ， and the surface resistance is only 1. 2 Ω/□. In terms of electrochromic properties ， CAW films show fast colored and bleached response times of 9. 3 s and 2. 0 s ， high optical contrast of up to 83. 0% （ 564 nm ）， wide range of reflective color modulation （ >40 nm ）， and excellent electrochemical cycling stability （ >4 500 cycles ） . In addition ， CAW films have good substrate compatibili⁃ ty. We prepared flexible CAW films and assembled patterned flexible electrochromic devices. The electrical proper⁃ ties of the flexible film remain almost unchanged after 2 000 consecutive bends and the optical contrast reaches 83. 2% at 574 nm. The devices realize rich reflected color dynamic regulation under different voltages. These results will provide simple and effective guidance for the construction of high - performance flexible reflective electrochromic devices ， and have certain application potential in the field of new display technology

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基于Cr/Ag/WO3薄膜的柔性反射型电致变色器件

柔性反射电致变色器件在电子纸显示、伪装旗、智能变色表面等方面具有广阔的应用前景，但目前还存在柔性差、光学对比度低、稳定性差等问题。采用电子束蒸发的方法在玻璃和柔性PET衬底上制备了Cr/Ag/ wo3 (CAW)结构的无铟反射电致变色电极。CAW薄膜具有高反射率和低表面电阻。平均可见光反射率高达89。2%，表面电阻仅为1。2Ω/□。在电致变色性能方面，CAW薄膜表现出快速着色和漂白的响应时间为9。3秒和2秒。0秒，光学对比度高，高达83。0% (564 nm)，宽反射颜色调制范围(>40 nm)，优异的电化学循环稳定性(> 4500循环)。此外，CAW薄膜具有良好的衬底相容性，制备了柔性CAW薄膜并组装了图像化柔性电致变色器件。在连续弯曲2000次后，柔性薄膜的电性基本保持不变，光学对比度达到83。在574nm处2%。器件在不同电压下实现丰富的反射色彩动态调节。这些结果将为构建高性能柔性反射电致变色器件提供简单有效的指导，在新型显示技术领域具有一定的应用潜力

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来源期刊

发光学报 Physics and Astronomy-Radiation

CiteScore

1.90

自引率

0.00%

发文量

7477

期刊介绍： Chinese Journal of Luminescence (CJL), supervised by Chinese Academy of Sciences (CAS), Sponsored by Committee on luminescence of Chinese Physical Society and Changchun Institute of Optics, Fine mechanics and Physics（CIOMP）of Chinese Academy of Sciences, is an authoritatively scientific and technical periodical of China in the field of luminescence, which is read widely in providing original papers and reviews that describe recent developments on basic theory and experimental studies of excited state processes and green lighting projects. The journal was established at 1980, and named after LUMINESCENCE AND DISPLAY, then renamed as CJL in 1986.