Nanostructured Quasiplanar Heterointerface for a Highly Stable and Ultrafast Switching Flexible Inorganic Electrochromic Smart Window.

IF 9.1 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters Pub Date : 2025-02-12 Epub Date: 2025-01-31 DOI:10.1021/acs.nanolett.4c05696

Pan Li, Xiaoxin Liu, Ying Lv, Xin You, Xiaotian Li, Xiaoyang Guo, Tienan Wang, Xingyuan Liu

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Abstract

Electrochromic (EC) technology can adjust optical properties under electrical stimulation with broad applications in smart windows, displays, and camouflage. However, significant challenges remain in developing inorganic EC films with high durability, rapid response, and mechanical flexibility due to intrinsic brittleness and dense microstructure. Herein, a nanostructured quasiplanar heterointerface (Q-PHI) is first introduced into the electrode/EC interlayer to realize a robust, ultrafast switching tungsten trioxide (WO₃) EC film. The 200 nm-thick Q-PHI WO₃ film exhibits remarkable EC performance, including large optical contrast (81.8% and 83.4% at 700 and 1500 nm), ultrafast switching of 2.4 and 1.8 s, and excellent stability (10,000 cycles with 21.3% optical-contrast loss). A large-area (20 × 15 cm²) flexible EC smart window is also successfully achieved. The mechanism lies in the intense built-in electric field and strong interfacial bonding induced by the Q-PHI with unique longitudinal gradient distribution, greatly enhancing the electron/ion transport kinetics, surface ion adsorption, and durability.

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高稳定、超快切换柔性无机电致变色智能窗口的纳米结构准平面异质界面。

电致变色（EC）技术可以在电刺激下调节光学特性，在智能窗口、显示器和伪装等领域有着广泛的应用。然而，由于其固有的脆性和致密的微观结构，在开发具有高耐久性、快速响应和机械柔韧性的无机EC薄膜方面仍然存在重大挑战。本文首先在电极/EC中间层中引入纳米结构的准平面异质界面（Q-PHI），实现了一种鲁棒、超快开关的三氧化钨（WO3） EC膜。200 nm厚的Q-PHI WO3薄膜表现出卓越的EC性能，包括大的光学对比度（700和1500 nm分别为81.8%和83.4%），2.4和1.8 s的超快切换，以及出色的稳定性（10,000次循环，21.3%的光学对比度损失）。并成功实现了大面积（20 × 15 cm2）柔性EC智能窗。其机理是由于Q-PHI具有独特的纵向梯度分布，产生了强烈的内置电场和强的界面键合，大大增强了电子/离子传输动力学、表面离子吸附和耐久性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nano Letters 工程技术-材料科学：综合

CiteScore

16.80

自引率

2.80%

发文量

1182

审稿时长

1.4 months

期刊介绍： Nano Letters serves as a dynamic platform for promptly disseminating original results in fundamental, applied, and emerging research across all facets of nanoscience and nanotechnology. A pivotal criterion for inclusion within Nano Letters is the convergence of at least two different areas or disciplines, ensuring a rich interdisciplinary scope. The journal is dedicated to fostering exploration in diverse areas, including: - Experimental and theoretical findings on physical, chemical, and biological phenomena at the nanoscale - Synthesis, characterization, and processing of organic, inorganic, polymer, and hybrid nanomaterials through physical, chemical, and biological methodologies - Modeling and simulation of synthetic, assembly, and interaction processes - Realization of integrated nanostructures and nano-engineered devices exhibiting advanced performance - Applications of nanoscale materials in living and environmental systems Nano Letters is committed to advancing and showcasing groundbreaking research that intersects various domains, fostering innovation and collaboration in the ever-evolving field of nanoscience and nanotechnology.