具有巨大压电电压系数的二维层状钙钛矿铁电体。
Two-Dimensional Layered Perovskite Ferroelectric with Giant Piezoelectric Voltage Coefficient.
作者信息
Chen Xiao-Gang, Song Xian-Jiang, Zhang Zhi-Xu, Li Peng-Fei, Ge Jia-Zhen, Tang Yuan-Yuan, Gao Ji-Xing, Zhang Wan-Ying, Fu Da-Wei, You Yu-Meng, Xiong Ren-Gen
机构信息
Jiangsu Key Laboratory for Science and Applications of Molecular Ferroelectrics , Southeast University , Nanjing 211189 , People's Republic of China.
Ordered Matter Science Research Center , Nanchang University , Nanchang 330031 , People's Republic of China.
出版信息
J Am Chem Soc. 2020 Jan 15;142(2):1077-1082. doi: 10.1021/jacs.9b12368. Epub 2019 Dec 31.
Piezoelectric sensors that can work under various conditions with superior performance are highly desirable with the arrival of the Internet of Things. For practical applications, a large piezoelectric voltage coefficient and a high Curie temperature are critical to the performance of piezoelectric sensors. Here, we report a two-dimensional perovskite ferroelectric (4-aminotetrahydropyran)PbBr [(ATHP)PbBr] with a saturated polarization of 5.6 μC cm, high of 503 K [above that of BaTiO (BTO, 393 K)], and extremely large of 660.3 × 10 V m N [much beyond that of Pb(Zr,Ti)O (PZT) ceramics (20 to 40 × 10 V m N), more than 2 times higher than that of poly(vinylidene fluoride) (PVDF, about 286.7 × 10 V m N)]. Combined with the advantages of molecular ferroelectrics, such as light weight, easy and environmentally friendly processing, and mechanical flexibility, (ATHP)PbBr would be a competitive candidate for next-generation smart piezoelectric sensors in flexible devices, soft robotics, and biomedical devices.
随着物联网的到来，迫切需要能够在各种条件下以卓越性能工作的压电传感器。对于实际应用而言，大的压电电压系数和高居里温度对压电传感器的性能至关重要。在此，我们报道了一种二维钙钛矿铁电体（4-氨基四氢吡喃）溴化铅[(ATHP)PbBr]，其饱和极化强度为5.6 μC/cm²，高居里温度为503 K[高于钛酸钡（BTO，393 K）]，以及极大的压电电压系数为660.3×10⁻³ V m/N[远超过锆钛酸铅（PZT）陶瓷（20至40×10⁻³ V m/N），比聚偏二氟乙烯（PVDF，约286.7×10⁻³ V m/N）高出2倍多]。结合分子铁电体的优点，如重量轻、加工简便且环保以及机械柔韧性，(ATHP)PbBr将成为柔性设备、软体机器人和生物医学设备中下一代智能压电传感器的有力候选材料。
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