Journal of Shanghai University(Natural Science Edition) ›› 2024, Vol. 30 ›› Issue (1): 43-053.doi: 10.12066/j.issn.1007-2861.2323
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WU Hao,ZHAO Jiadong,LIU Chunyu,YU Shengwen
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Abstract: It is necessary to select appropriate thickness for the fabrication of Bi2O3 thin films with reasonable electrochromic properties. Bi2O3 thin films with an approximate range of 20∼300 nm in thickness were prepared by magnetron sputtering. The electrochromic properties of the films were analyzed by using ultraviolet-visible (UV-Vis) spectrophotometry and an electrochemical workstation. The surface morphology and phase structure of the thin films were investigated by scanning electron microscope (SEM) and X-ray diffraction (XRD). After comprehensive screening to assess their performance in terms of the color change contrast (∆Tλ=550 nm), electrochromic efficiency (η), and performance retention (R∆T , Rη ), the values of ∆T and η of Bi2O3 thin films with a thickness between 60 nm and 120 nm were found to reach 25% and 10 cm2/C, respectively. Furthermore, the retention of the electrochromic properties (R∆T = 20%, Rη = 44.6%) is high. This may be related to the fact that the main phase of the film in this thickness range is δ, which is characterized by high ionic conductivity.
Key words: ?lm thickness, bismuth oxide, electrochromism, thin ?lm
CLC Number:
TB 321
WU Hao, ZHAO Jiadong, LIU Chunyu, YU Shengwen. Thickness selection of Bi2O3 electrochromic films[J]. Journal of Shanghai University(Natural Science Edition), 2024, 30(1): 43-053.
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URL: https://www.journal.shu.edu.cn/EN/10.12066/j.issn.1007-2861.2323
https://www.journal.shu.edu.cn/EN/Y2024/V30/I1/43