电致变色
无定形固体
热发射率
薄膜
材料科学
电致变色装置
溅射
光电子学
溅射沉积
结晶度
图层(电子)
光学
分析化学(期刊)
纳米技术
化学
物理
物理化学
复合材料
色谱法
梁(结构)
有机化学
电极
作者
Xiang Zhang,Yanlong Tian,Wenjie Li,Shuliang Dou,Sheng Wang,Huiying Qu,Jiupeng Zhao,Yao Li
标识
DOI:10.1016/j.solmat.2019.109916
摘要
In this study, two all-solid-state electrochromic devices (ECDs), composed of amorphous WO3 (a-WO3) and crystalline WO3 (c-WO3) as the electrochromic layers, have been prepared using radio frequency magnetron sputtering. The devices have five-layered structures consisting of LiTaO3 as the solid electrolyte layer, NiOx as the ion storage layer, and ITO as the electrode layer. The a-WO3 and c-WO3 films are prepared by adjusting the sputtering power, thus not affecting the phase composition of the other layers. The infrared (IR) emittance of both devices is studied in detail. The results show that the crystallinity of the WO3 layer greatly influences the IR emittance of the devices. The IR emittance of the a-WO3 ECD in the range of 2.5–25 μm increases greatly after lithium ion insertion, whereas the IR emittance of the c-WO3 ECD decreases. This difference can be explained by the absorption of IR vibrations and the reflection of the pseudo-metallic behavior of WO3. a-WO3 ECD exhibits a greater regulating capacity for thermal radiation, and its emittance modulation range is about 0.37 in the spectral range 8–14 μm and 0.30 in the spectral range 2.5–25 μm. The electrochromic technique is an ideal thermal control method for future space technology.
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