Morphotropic Phase Boundary in Polarized Organic Piezoelectric Materials

被引：10

作者：

Gao, Fangfang ^{[1
,2
]}

Zhao, Xuan ^{[1
,2
]}

Xun, Xiaochen ^{[1
,2
]}

Huang, Houbing ^{[3
]}

Shi, Xiaoming ^{[3
]}

Li, Qi ^{[1
,2
]}

Liu, Fang ^{[4
,5
]}

Gao, Peng ^{[4
,5
]}

Liao, Qingliang ^{[1
,2
]}

Zhang, Yue ^{[1
,2
]}

机构：

[1] Univ Sci & Technol Beijing, Acad Adv Interdisciplinary Sci & Technol, Beijing Adv Innovat Ctr Mat Genome Engn, Beijing 100083, Peoples R China

[2] Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing Key Lab Adv Energy Mat & Technol, Beijing 100083, Peoples R China

[3] Beijing Inst Technol, Adv Res Inst Multidisciplinary Sci, Beijing 100081, Peoples R China

[4] Peking Univ, Sch Phys, Electron Microscopy Lab, Beijing 100871, Peoples R China

[5] Peking Univ, Int Ctr Quantum Mat, Sch Phys, Beijing 100871, Peoples R China

来源：

PHYSICAL REVIEW LETTERS | 2023年 / 130卷 / 24期

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

VINYLIDENE FLUORIDE; BEHAVIOR;

D O I：

10.1103/PhysRevLett.130.246801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Designing the morphotropic phase boundary (MPB) has been the most sought-after approach to achieve high piezoelectric performance of piezoelectric materials. However, MPB has not yet been found in the polarized organic piezoelectric materials. Here, we discover MPB with biphasic competition of & beta; and 3/1-helical phases in the polarized piezoelectric polymer alloys (PVTC-PVT) and demonstrate a mechanism to induce MPB using the compositionally tailored intermolecular interaction. Consequently, PVTC-PVT exhibits a giant quasistatic piezoelectric coefficient of >32 pC/N while maintaining a low Young's modulus of 182 MPa, with a record-high figure of merit of piezoelectricity modulus of about 176 pC/(N & BULL; GPa) among all piezoelectric materials.

引用

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