Controlling the Optical Properties of Dynamic Windows Based on Reversible Metal Electrodeposition
Controlling the Optical Properties of Dynamic Windows Based on Reversible Metal Electrodeposition
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基于可逆金属电沉积控制动态窗口的光学性能
DOI：
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发表时间：
2020
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通讯作者：
Christopher J. Barile
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作者：
Cassondra L DeFoor;Joseph F. Jeanetta;Christopher J. Barile
我们描述的物理化学策略，允许控制的传输和颜色的动态窗口的基础上可逆的金属电沉积。用于Bi和Cu电沉积的电解质组成和电压分布显著影响器件的颜色，如通过La*B* 空间比色法（L =亮度，a* =红/绿色坐标，B* =黄/蓝坐标）量化的。首先，在电解质组成方面，我们发现，虽然增加Cu离子浓度提高了器件的最大可达到的不透明度，但它降低了窗口的色中性。其次，我们证明，改变电沉积电压分布影响金属电沉积物的平均尺寸，这反过来又决定了着色过程中的设备颜色。通过SEM-EDX成像和米氏理论计算的组合，我们开发了一个模型，令人满意地预测电沉积形态和颜色中性之间的关系。采用脉冲电沉积技术制备了一种新型的电沉积复合材料。
We describe physicochemical strategies that allow for control of the transmission and color of dynamic windows based on reversible metal electrodeposition. The electrolyte composition and voltage profile used for Bi and Cu electrodeposition significantly affect the color of the devices as quantified by La*b* space colorimetry (L = lightness, a* = red/green coordinate, b* = yellow/blue coordinate). First, in terms of electrolyte composition, we find that although increasing the Cu ion concentration improves the maximum attainable opacity of the devices, it decreases the color neutrality of the windows. Second, we demonstrate that altering the electrodeposition voltage profile affects the average size of the metal electrodeposits, which in turn dictates device color during tinting. Through a combination of SEM-EDX imaging and Mie theory calculations, we develop a model that satisfactorily predicts the relationship between electrodeposit morphology and color neutrality. By using pulsed electrodeposition to f...