Microstructure and characteristics of Zn and Mg-doped LiNbO3 materials for electrochromic devices

被引:1
|
作者
Liu, Haichao [1 ,3 ]
Gao, Ming [1 ]
Zhu, Qinqing [2 ]
Chen, Haojie [2 ]
Wang, Fangfang [1 ]
Zhang, Hu [1 ]
机构
[1] Beihang Univ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China
[2] Beihang Univ, NIT, Ningbo 31500, Peoples R China
[3] Beihang Univ, Qingdao Res Inst, Qingdao 266000, Peoples R China
基金
中国国家自然科学基金;
关键词
Doped LiNbO3; Electrochromic device; Solid electrolyte; Magnetron sputtering; LITHIUM-NIOBATE; OPTICAL-PROPERTIES; WAVE-GUIDES; DAMAGE; STORAGE; LITAO3; FILMS; WO3;
D O I
10.1016/j.ceramint.2024.11.133
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
In this investigation, polycrystalline targets of lithium niobate (LN), zinc-doped lithium niobate (Zn:LN), and magnesium-doped lithium niobate (Mg:LN) were synthesized utilizing the Hot Isostatic Pressing (HIP) and Cold Isostatic Pressing (CIP) sintering technique. Subsequently, amorphous thin films of LN, Zn:LN, and Mg:LN and electrochromic devices were fabricated via radio frequency (RF) magnetron sputtering. Comprehensive characterization of the microstructure and optoelectronic properties of the targets, films and devices was conducted employing scanning electron microscopy, X-ray diffraction, spectrophotometry, atomic force microscopy, and an electrochemical workstation. Studies have shown that doping with zinc and magnesium enhances the sintering quality of ceramics, reducing lithium vacancies in polycrystalline lithium niobate ceramics. Zinc doping increases the resistance of lithium niobate, whereas magnesium doping introduces a secondary phase that decreases the resistance. The resistances of LN, Zn:LN, and Mg:LN polycrystalline ceramics are 8.35 GS2, 9.80 GS2, and 7.61 GS2, respectively. The doping process refines the growth of the target and film particles, enhancing the microstructural quality. Notably, the ionic conductivity of the Mg:LN film escalates to 1.7 x 10-5 S/cm. Using doped lithium niobate thin films as electrolytes, the electrochromic devices showed a 38 % increase in coloration efficiency and a 46 % improvement in bleaching efficiency, significantly enhancing device performance.
引用
收藏
页码:1595 / 1604
页数:10
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