ITO/Cu multilayer electrodes for high-brightness electrochromic displays

Xueqing Tang; Zishou Hu; Zhen Wang; Jian Chen; Xinyang Mu; Ge Song; Peiyan Sun; Zhengji Wen; Jiaming Hao; Shan Cong; Zhigang Zhao

doi:10.1016/j.esci.2022.08.005

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Xueqing Tang, Zishou Hu, Zhen Wang, Jian Chen, Xinyang Mu, Ge Song, Peiyan Sun, Zhengji Wen, Jiaming Hao, Shan Cong, Zhigang Zhao. ITO/Cu multilayer electrodes for high-brightness electrochromic displays[J]. eScience. doi: 10.1016/j.esci.2022.08.005

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ITO/Cu multilayer electrodes for high-brightness electrochromic displays

doi: 10.1016/j.esci.2022.08.005

Xueqing Tang^1,3,
Zishou Hu¹,
Zhen Wang³,
Jian Chen^1,3,
Xinyang Mu³,
Ge Song^1,3,
Peiyan Sun³,
Zhengji Wen⁵,
Jiaming Hao⁵,
Shan Cong^1,2,4,
Zhigang Zhao^{1,3,4
,
,}

1 School of Nano-Tech and Nano-Bionics, University of Science and Technology of China, Hefei 230000, China;
2 Key Laboratory of Multifunctional Nanomaterials and Smart Systems, Chinese Academy of Sciences (CAS), Suzhou 215123, China;
3 Key Lab of Nanodevices and Applications, Suzhou Institute of Nano-Tech and NanoBionics, Chinese Academy of Sciences, Suzhou 215123, China;
4 Division of Nanomaterials, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Nanchang 330200, China;
5 State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China

Received Date: 2022-02-22
Revised Date: 2022-08-12
Accepted Date: 2022-08-29

Available Online: 2022-09-05

Abstract

Abstract

Fabry-Perot (F-P) nanocavity-type electrochromic devices with multicolor tunability have attracted significant interest in the past two years for their potential uses in a wide variety of applications, such as electronic display, military camouflage, and dynamic decoration. However, challenges such as insufficient brightness, lengthy switching times, and poor cycling stability have yet to be overcome. Herein, we demonstrate electrochromic electrodes based on ITO/Cu as both the current collector and the reflective layer, with WO₃ as the electrochromic material, forming a unique three-layered structure. The constituted WO₃/ITO/Cu films present a high brightness value of about 84% before coloration, and a decent brightness value of 48% after coloration at -0.8 V. Moreover, a fast switching time between different coloration states (t_c=2.2 s; t_b=1 s) is recorded, attributed to the extremely low sheet resistivity of the ITO/Cu current collector. The films also reveal excellent electrochemical cycling stability across 2,000 cycles.
- Electrochromic,
- High brightness,
- Tungsten trioxide,
- Copper

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Funds:

The authors are grateful to the financial supports from the National Key Research and Development Program of China (2020YFB1505703). This work is supported by the National Natural Science Foundation of China (52172299, 22175198, 51972331). Z. G. Z would like to acknowledge the support from the External Cooperation Program of the Chinese Academy of Sciences (121E32KYSB20190008), Six Talent Peaks Project of Jiangsu Province (XCL-170). S. C would like to acknowledge the support from the Youth Innovation Promotion Association, CAS (2018356), Outstanding Youth Fund of Jiangxi (20192BCBL23027).

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