Infrared electrochromic devices (IR-ECDs) are pivotal for dynamic thermal regulation. However, the quest for all-solid-state IR-ECDs with high stability and a broadly tunable range of emissivity remains a challenge. This study presents the development of an all-solid-state infrared electrochromic device (IR-ECD) with the structure of ITO/H_xWO₃/Ta₂O₅/Pd/Mg₃Ni based on the hydrogen-induced metal–insulator transition of Mg–Ni alloy films. The emissivity modulation is improved by film stack optimization, with changes of 0.32 and 0.47 in the 3–5 and 7.5–14 μm bands, respectively. The introduction of an ultrathin Ti isolation layer between the catalytic and electrolyte layers enhances the cyclic stability. Our findings offer a novel strategy for the design and fabrication of all-solid-state IR electrochromic devices and highlight the potential of Mg–Ni alloy-based all-solid-state IR-ECDs in advanced energy and information fields.

中文翻译：

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基于金属薄膜的全固态红外电致变色器件


红外电致变色器件 (IR-ECD) 对于动态热调节至关重要。然而，寻求具有高稳定性和发射率可调范围广泛的全固态 IR-ECD 仍然是一个挑战。本研究开发了一种结构为ITO/H _x WO ₃ /Ta ₂ /Pd/Mg ₃ Ni 基于 Mg-Ni 合金薄膜的氢诱导金属-绝缘体转变。通过薄膜叠层优化，发射率调制得到改善，在 3-5 和 7.5-14 μm 波段分别变化了 0.32 和 0.47。在催化层和电解质层之间引入超薄钛隔离层增强了循环稳定性。我们的研究结果为全固态红外电致变色器件的设计和制造提供了一种新颖的策略，并凸显了基于镁镍合金的全固态红外-ECD在先进能源和信息领域的潜力。