The electrochromic mirror device (ECD) demonstrating transparent, mirror, and black states with zero transmittance in the black state is fabricated using facile dry deposition method. The device is capable of achieving both a highly reflective mirror and a complete black state. ECD is fabricated using a WO₃ film deposited by nanoparticle deposition system (NPDS) and optical characteristics of its transparent, mirror, and black states are evaluated. Notably, the device demonstrates the mirror state with high reflectance over 80% and a black state that completely blocks the entire visible light, resulting in nearly zero transmittance. Device durability is evaluated over 100 cycles; the transmittance of the black and transparent states is measured to be 9.61%, 79.6% at its wavelength of 680 nm, respectively. Moreover, the reflectance of the mirror state at the same wavelength is measured to be 73.1% and 72.7% for the first and 100th cycles, respectively. Microstructural observations suggest that the visible light‐blocking effect is a consequence of the rough surface obtained using NPDS, which leads to uneven electrodeposition of Ag ions to produce localized surface plasmon resonance. Dry deposition method of the electrochromic layer is an excellent method for fabricating high‐contrast three‐mode electrochromic mirrors.

中文翻译：

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黑色状态下具有零透射率的三峰可切换镜装置的简便制造

使用便利的干法沉积方法制造了电致变色镜装置（ECD），该器件在黑色状态下显示具有零透射率的透明，镜面和黑色状态。该设备能够实现高反射镜和完全黑色状态。使用WO ₃制造ECD评估了由纳米粒子沉积系统（NPDS）沉积的薄膜及其透明，镜面和黑色状态的光学特性。值得注意的是，该设备展示了具有80％以上高反射率的镜面状态和完全阻挡整个可见光的黑色状态，从而使透射率几乎为零。评估设备的耐用性超过100个周期；在680nm的波长处测得的黑色和透明状态的透射率分别为9.61％和79.6％。此外，在第一个和第100个循环中，在相同波长下镜面状态的反射率分别被测量为73.1％和72.7％。微观结构观察表明，可见光阻挡效应是使用NPDS获得的粗糙表面的结果，这会导致Ag离子电沉积不均匀，从而产生局部表面等离子体共振。电致变色层的干法沉积方法是一种制造高对比度三模电致变色镜的极好方法。