摘要
杂化双金属卤化物由于具有丰富的结构并且在光电和光伏器件 领域中具有广阔的应用前景, 因而引起广泛的关注. 然而, RbIBiIII基杂 化双金属卤化物的铁电性质尚未被探索. 在本文中, 我们报道了一例罕 见的三维双金属卤化物铁电体: (3-hydroxypyrrolidinium)2RbBiBr6 (1). 其中, RbIBiII双金属多面体通过共面和共角顶联接成三维笼状无机框 架, 显现出4连接的lon拓扑结构, 而有机阳离子位于其孔洞中. 值得注 意的是, 该铁电体具有非常高的居里温度(432 K), 较大的自发极化强 度(5.73 µC cm−2)和热释电系数(28.35 µC m−2 K−1). 这项工作丰富了杂 化金属卤化物体系, 为探索稳定、绿色铁电材料提供了一种可行的 策略.
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Acknowledgements
This work was financially supported by the National Natural Science Foundation of China (21771037, 21875035, 21991144 and 21805033).
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Ye Q conceived and directed the project. He L, Xu K and Liu ZB performed the synthesis and characterization experiments. He L analyzed the data and wrote the manuscript with support from Ye Q and Zhang W. Shi PP participated in the discussion and helped in the artworks. All authors reviewed and have given approval to the final version of the manuscript.
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Experimental details and supporting data are available in the online version of the paper.
Lei He was born in 1996 in Liaoning Province, China. He is currently a PhD candidate in material physics and chemistry at Southeast University and under the supervision of Prof. Qiong Ye and Prof. Wen Zhang. His current research interests focus on the design and synthesis of molecular ferroelectric and ferroelastic materials, especially in the fields of hybrid metal halides and perovskites.
Wen Zhang was born in 1973 in Zhejiang Province, China. He received his MSc degree from Nanjing University in 2000 and his PhD degree from the Institute of Chemistry, Chinese Academy of Sciences, in 2004. He held postdoctoral positions at Peking University and Kyushu University. Now he is a professor at the School of Chemistry and Chemical Engineering, Southeast University. His research interests focus on polar & chiral functional molecular materials, especially dielectrics, ferroelectrics and dynamic crystals.
Qiong Ye was born in 1982 in Jiangxi Province, China. She received her PhD degree in 2007 from Nanjing University and then held a postdoctoral fellowship of Japan Society for the Promotion of Science (JSPS) in Japan over the next two years. Now she is a professor at the School of Chemistry and Chemical Engineering, Southeast University, with the main research interests in dielectric, ferroelectric, ferroelastic and multiferroic materials.
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He, L., Xu, K., Shi, PP. et al. A rare 3D hybrid bimetal halide ferroelectric: (3-Hydroxypyrrolidinium)2RbBiBr6. Sci. China Mater. 65, 2879–2883 (2022). https://doi.org/10.1007/s40843-022-2030-x
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DOI: https://doi.org/10.1007/s40843-022-2030-x