An organic-inorganic perovskite ferroelectric with large piezoelectric response

Yu-Meng You, Wei-Qiang Liao, Dewei Zhao, Heng-Yun Ye, Yi Zhang, Qionghua Zhou, Xianghong Niu, Jinlan Wang, Peng-Fei Li, Da-Wei Fu, Zheming Wang, Song Gao (+5 others)
2017 Science  
Molecular piezoelectrics are highly desirable for their easy and environment-friendly processing, light weight, low processing temperature, and mechanical flexibility. However, although 136 years have passed since the discovery in 1880 of the piezoelectric effect, molecular piezoelectrics with a piezoelectric coefficient d 33 comparable with piezoceramics such as barium titanate (BTO;~190 picocoulombs per newton) have not been found. We show that trimethylchloromethyl ammonium
more » ... (II), an organic-inorganic perovskite ferroelectric crystal processed from aqueous solution, has a large d 33 of 185 picocoulombs per newton and a high phase-transition temperature of 406 kelvin (K) (16 K above that of BTO). This makes it a competitive candidate for medical, micromechanical, and biomechanical applications.
doi:10.1126/science.aai8535 pmid:28729511 fatcat:or56hkpciza4njpdlaaz5dimni