High pyroelectric performance due to ferroelectric-antiferroelectric transition near room temperature

• Published in: Journal of materials chemistry. C, Materials for optical and electronic devices Vol. 8; no. 23; pp. 782 - 7827
• Main Authors: Li, Ling, Liu, Hui, Wang, Rui-Xue, Zhang, Haibo, Huang, Houbing, Lu, Ming-Hui, Zhang, Shan-Tao, Jiang, Shenglin, Wu, Di, Chen, Yan-Feng
• Format: Journal Article
• Language: English
• Published: Cambridge Royal Society of Chemistry 01.01.2020
• Subjects: Antiferroelectricity; Ferroelectric materials; Room temperature; Zinc oxide
• ISSN: 2050-7526; 2050-7534
• DOI: 10.1039/d0tc01511c

Pyroelectric materials have a huge market in daily life applications and high pyroelectric performances near room temperature are highly desired. Here we report high pyroelectric performance with adjustable peak performance temperature of 29-46.2 °C in the (1 − x )Pb 0.99 Nb 0.02 [(Zr 0.57 Sn 0.43 ) 0.937 Ti 0.063 ] 0.98 O 3 - x ZnO ((1 − x )PNZST- x ZnO) composite. The x = 0.1 composite has a peak pyroelectric coefficient of 1053.9 × 10 −4 C m −2 K −1 and figures of merit of F v = 1249.4 × 10 −2 m 2 C −1 , F d = 876.3 × 10 −5 Pa −1/2 , and F i = 832.7 × 10 −10 m V −1 at around 39 °C. It is found that a robust room temperature ferroelectric state is realized in antiferroelectric PNZST due to ZnO-induced internal strain. The thermal-driven ferroelectric to antiferroelectric transition leads to high pyroelectric performance. This work provides a promising material candidate for high performance pyroelectric devices. Pyroelectric materials have a huge market in daily life applications and high pyroelectric performances near room temperature are highly desired.