Electrocaloric effect and pyroelectric properties of organic-inorganic hybrid (C2H5NH3)2CuCl4

doi:10.1088/1674-1056/ab48db

中国物理B ›› 2019, Vol. 28 ›› Issue (11): 117701-117701.doi: 10.1088/1674-1056/ab48db

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇下一篇

Electrocaloric effect and pyroelectric properties of organic-inorganic hybrid (C₂H₅NH₃)₂CuCl₄

Yi Liu(刘义), Yan-Fen Chang(畅艳芬), Young Sun(孙阳), Jun Shen(沈俊), Li-Qin Yan(闫丽琴), Zun-Ming Lu(卢遵铭)

1 School of Material Science and Engineering, Hebei University of Technology, Tianjin 300130, China;
2 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
3 Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China

收稿日期:2019-03-25 修回日期:2019-09-09 出版日期:2019-11-05 发布日期:2019-11-05
通讯作者: Li-Qin Yan, Zun-Ming Lu E-mail:lqyan@iphy.ac.cn;luzunming@hebut.edu.cn
基金资助:
Project supported by the Fujian Institute of Innovation, Chinese Academy of Sciences (Grant No. FJCXY18040303), the Youth Innovation Promotion of the Chinese Academy of Sciences (Grant No. 2013004), and the National Natural Science Foundation of China (Grant Nos. 51676198 and 51771067).

Electrocaloric effect and pyroelectric properties of organic-inorganic hybrid (C₂H₅NH₃)₂CuCl₄

Yi Liu(刘义)^1,3, Yan-Fen Chang(畅艳芬)², Young Sun(孙阳)², Jun Shen(沈俊)³, Li-Qin Yan(闫丽琴)², Zun-Ming Lu(卢遵铭)¹

1 School of Material Science and Engineering, Hebei University of Technology, Tianjin 300130, China;
2 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
3 Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China

Received:2019-03-25 Revised:2019-09-09 Online:2019-11-05 Published:2019-11-05
Contact: Li-Qin Yan, Zun-Ming Lu E-mail:lqyan@iphy.ac.cn;luzunming@hebut.edu.cn
Supported by:
Project supported by the Fujian Institute of Innovation, Chinese Academy of Sciences (Grant No. FJCXY18040303), the Youth Innovation Promotion of the Chinese Academy of Sciences (Grant No. 2013004), and the National Natural Science Foundation of China (Grant Nos. 51676198 and 51771067).

摘要/Abstract

摘要： The organic-inorganic hybrid (C₂H₅NH₃)₂CuCl₄ (EA₂CuCl₄) single crystals are prepared by the solvothermal condition method. The x-ray diffraction, scanning electron microscopy, dielectric permittivity, pyroelectric current, and heat capacity are used to systematically investigate the electrocaloric performances of EA₂CuCl₄. The pyroelectric currents are measured under various voltages, and the electrocaloric effect (ECE) is calculated. Its ECE exhibits an isothermal entropy change of 0.0028 J/kg·K under an electric field of 30 kV/cm associated with a relatively broad temperature span. Further, the maximum pyroelectric coefficient (p) is 4×10^-3 C/m²·K and the coefficient β for generating ECE from electric displacement D is 1.068×10⁸ J·cm·K^-1·C^-2 at 240 K. Our results indicate that the ECE behavior of organic-inorganic hybrid EA₂CuCl₄ is in accordance with Jona and Shirane's opinion in which the ECE should occur both below and above the Curie temperature T_c.

关键词: electrocaloric effect, pyroelectric properties, organic-inorganic perovskite

Abstract: The organic-inorganic hybrid (C₂H₅NH₃)₂CuCl₄ (EA₂CuCl₄) single crystals are prepared by the solvothermal condition method. The x-ray diffraction, scanning electron microscopy, dielectric permittivity, pyroelectric current, and heat capacity are used to systematically investigate the electrocaloric performances of EA₂CuCl₄. The pyroelectric currents are measured under various voltages, and the electrocaloric effect (ECE) is calculated. Its ECE exhibits an isothermal entropy change of 0.0028 J/kg·K under an electric field of 30 kV/cm associated with a relatively broad temperature span. Further, the maximum pyroelectric coefficient (p) is 4×10^-3 C/m²·K and the coefficient β for generating ECE from electric displacement D is 1.068×10⁸ J·cm·K^-1·C^-2 at 240 K. Our results indicate that the ECE behavior of organic-inorganic hybrid EA₂CuCl₄ is in accordance with Jona and Shirane's opinion in which the ECE should occur both below and above the Curie temperature T_c.

Key words: electrocaloric effect, pyroelectric properties, organic-inorganic perovskite

中图分类号: (Pyroelectric and electrocaloric effects)

77.70.+a

77.55.-g (Dielectric thin films) 81.07.Pr (Organic-inorganic hybrid nanostructures)

刘义, 畅艳芬, 孙阳, 沈俊, 闫丽琴, 卢遵铭. Electrocaloric effect and pyroelectric properties of organic-inorganic hybrid (C₂H₅NH₃)₂CuCl₄[J]. 中国物理B, 2019, 28(11): 117701-117701.

Yi Liu(刘义), Yan-Fen Chang(畅艳芬), Young Sun(孙阳), Jun Shen(沈俊), Li-Qin Yan(闫丽琴), Zun-Ming Lu(卢遵铭). Electrocaloric effect and pyroelectric properties of organic-inorganic hybrid (C₂H₅NH₃)₂CuCl₄[J]. Chin. Phys. B, 2019, 28(11): 117701-117701.

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Electrocaloric effect and pyroelectric properties of organic-inorganic hybrid (C₂H₅NH₃)₂CuCl₄

Electrocaloric effect and pyroelectric properties of organic-inorganic hybrid (C₂H₅NH₃)₂CuCl₄

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