Chemical Synthesis of Multilayered Nanostructured Perovskite Thin Films with Dielectric Features for Electric Capacitors

Authors

Mohamed B. Zakaria, National Institute for Materials Science, Tanta University
Takahiro Nagata, National Institute for Materials Science
Asahiko Matsuda, National Institute For Materials Science
Yudai Yasuhara, Meiji University, National Institute For Materials Science
Atsushi Ogura, Meiji University
Md. Shahriar Al Hossain, University of WollongongFollow
Md Motasim Billah, University of WollongongFollow
Yusuke Yamauchi, University of Queensland, Kyung Hee UniversityFollow
Toyohiro Chikyow, National Institute For Materials Science, Meiji University

RIS ID

135946

Publication Details

Zakaria, M. Barakat., Nagata, T., Matsuda, A., Yasuhara, Y., Ogura, A., Hossain, M. A., Billah, M., Yamauchi, Y. & Chikyow, T. (2018). Chemical Synthesis of Multilayered Nanostructured Perovskite Thin Films with Dielectric Features for Electric Capacitors. Acs Applied Nano Materials, 1 (2), 915-921.

Abstract

We report a simple sol−gel method for the preparation of multilayered hybrid thin films composed of nanostructured SrTiO3 (STO) and BaTiO3 (BTO) layers. A nanoporous thin film of STO is prepared by the spin-coating method on Si/SiO2/Ti/Pt substrate. When the BTO is processed, the BTO is crystallized between STO crystal pores. A significant strain field is induced on the interface between the STO and BTO surfaces. The concave shape of the nanopores could enable the realization of a highly strained interfacial heterostructure composed of STO/BTO. Compared to nanostructured STO, BTO, and bilayer STO/BTO films, multilayered STO/BTO films show the highest dielectric constant and a high Curie temperature (Tc) at around 280 °C, which is suitable for electric capacitor applications.