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Electrochromic Devices Based on 2D MoO3–x/PEDOT:PSS Composite Film with Boosted Ion Transport
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2024-03-28 , DOI: 10.1021/acsami.4c01108
Haolin Yu 1 , Huajing Fang 1 , Kai Jing 1 , Hailong Ma 1 , Lingqi Wu 1 , Yang Chai 2
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2024-03-28 , DOI: 10.1021/acsami.4c01108
Haolin Yu 1 , Huajing Fang 1 , Kai Jing 1 , Hailong Ma 1 , Lingqi Wu 1 , Yang Chai 2
Affiliation
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Electrochromic materials allow for optical modulation and have attracted much attention due to their bright future in applications such as smart windows and energy-saving displays. Two-dimensional (2D) molybdenum oxide nanoflakes with combined advantages of high active specific surface area and natural layered structure should be highly potential candidates for electrochromic devices. However, the efficient top-down preparation of 2D MoO3 nanoflakes is still a huge challenge and the sluggish ionic kinetics hinder its electrochromic performance. Herein, we demonstrated a feasible thiourea-assisted exfoliation procedure, which can not only increase the yield but also reduce the thickness of 2D MoO3–x nanoflakes down to a few nanometers. Furthermore, electrophoretic-deposited MoO3–x nanoflakes were combined with poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS)-conjugated polymer to simultaneously enhance the ionic kinetics and electronic conductivity, with a diffusion coefficient of 3.09 × 10–10 cm2 s–1 and a charge transport resistance of 33.7 Ω. The prepared 2D MoO3–x/PEDOT:PSS composite films exhibit improved electrochromic performance, including fast switching speed (7 s for bleaching, 5 s for coloring), enhanced coloration efficiency (87.1 cm2 C–1), and large transmittance modulation (ΔT = 65%). This study shows outstanding potential for 2D MoO3–x nanoflakes in electrochromic applications and opens new avenues for optimizing the ion transport in inorganic–organic composites, which will be possibly inspired for other electrochemical devices.
中文翻译：
基于具有增强离子传输功能的 2D MoO3–x/PEDOT:PSS 复合薄膜的电致变色器件
电致变色材料可进行光学调制，因其在智能窗户和节能显示器等应用中的光明前景而备受关注。二维（2D）氧化钼纳米片具有高活性比表面积和自然层状结构的综合优点，应该是电致变色器件的高度潜在候选者。然而，高效自上而下制备2D MoO 3纳米片仍然是一个巨大的挑战，缓慢的离子动力学阻碍了其电致变色性能。在此，我们展示了一种可行的硫脲辅助剥离程序，该程序不仅可以提高产量，还可以将2D MoO 3– x纳米片的厚度降低至几纳米。此外，电泳沉积的MoO 3– x纳米片与聚(3,4-乙烯二氧噻吩):聚(苯乙烯磺酸)(PEDOT:PSS)共轭聚合物结合，同时增强离子动力学和电子电导率，扩散系数为3.09 × 10 –10 cm 2 s –1且电荷传输电阻为 33.7 Ω。所制备的2D MoO 3– x /PEDOT:PSS复合薄膜表现出改善的电致变色性能，包括快速切换速度（漂白7 s，着色5 s）、增强的着色效率（87.1 cm 2 C –1 ）和大的透射率调制（ ΔT = 65%）。 这项研究显示了 2D MoO 3– x纳米薄片在电致变色应用中的巨大潜力，并为优化无机-有机复合材料中的离子传输开辟了新途径，这可能会对其他电化学装置产生启发。
更新日期：2024-03-28
中文翻译：
基于具有增强离子传输功能的 2D MoO3–x/PEDOT:PSS 复合薄膜的电致变色器件
电致变色材料可进行光学调制，因其在智能窗户和节能显示器等应用中的光明前景而备受关注。二维（2D）氧化钼纳米片具有高活性比表面积和自然层状结构的综合优点，应该是电致变色器件的高度潜在候选者。然而，高效自上而下制备2D MoO 3纳米片仍然是一个巨大的挑战，缓慢的离子动力学阻碍了其电致变色性能。在此，我们展示了一种可行的硫脲辅助剥离程序，该程序不仅可以提高产量，还可以将2D MoO 3– x纳米片的厚度降低至几纳米。此外，电泳沉积的MoO 3– x纳米片与聚(3,4-乙烯二氧噻吩):聚(苯乙烯磺酸)(PEDOT:PSS)共轭聚合物结合，同时增强离子动力学和电子电导率，扩散系数为3.09 × 10 –10 cm 2 s –1且电荷传输电阻为 33.7 Ω。所制备的2D MoO 3– x /PEDOT:PSS复合薄膜表现出改善的电致变色性能，包括快速切换速度（漂白7 s，着色5 s）、增强的着色效率（87.1 cm 2 C –1 ）和大的透射率调制（ ΔT = 65%）。 这项研究显示了 2D MoO 3– x纳米薄片在电致变色应用中的巨大潜力，并为优化无机-有机复合材料中的离子传输开辟了新途径，这可能会对其他电化学装置产生启发。
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