Effect of crystallization temperature on energy-storage density and efficiency of lead-free Bi0.5(Na0.8K0.2)0.5TiO3 thin films prepared by sol–gel method

Nguyen, Dang Co and Bui, Dinh Tu and Le, Viet Cuong and Pham, Duc Thang (2019) Effect of crystallization temperature on energy-storage density and efficiency of lead-free Bi0.5(Na0.8K0.2)0.5TiO3 thin films prepared by sol–gel method. Journal of Science: Advanced Materials and Devices, 4 (3). pp. 370-375. ISSN 2468-2179

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Abstract

Lead-free Bi0.5(Na0.80K0.20)0.5TiO3 (BNKT) ferroelectric films were synthesized on Pt/Ti/SiO2/Si substrates via the chemical solution deposition. The influence of the crystallization temperature on the microstructures, the ferroelectric and energy-storage properties of the films was investigated in detail. The results showed that the BNKT films have reached the well crystallized state in the single-phase perovskite structure at 700 °C. Ferroelectric and energy-storage properties of the films were significantly enhanced by increasing the crystallization temperature. The remnant polarization (2Pr) and maximum polarization (2Pm) reached the highest values of 18.4 μC/cm2 and 61.2 μC/cm2, respectively, under an applied electric field of 300 kV/cm. Thanks to the strong enhancement in 2Pm and the large Pmax - Pr value, the highest energy-storage density (Jreco) and efficiency of 2.3 J/cm3 and 58.2%, respectively, were obtained. These results indicate that the BNKT films have application potentials in advanced capacitors.

Item Type:	Article
Subjects:	Engineering Physics ISI/Scopus indexed conference
Divisions:	Faculty of Engineering Physics and Nanotechnology (FEPN)
Depositing User:	PhD. Co Dang Nguyen
Date Deposited:	08 Dec 2020 09:32
Last Modified:	08 Dec 2020 09:32
URI:	http://eprints.uet.vnu.edu.vn/eprints/id/eprint/4131

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