Influence of the Addition of Rare Earth Elements on the Energy Storage and Optical Properties of Bi0.5Na0.5TiO3-0.06BaTiO3 Polycrystalline Thin Films

Ilham Hamdi Alaoui; Mebarki Moussa; Nathalie Lemée; Françoise Le Marrec; Anna Cantaluppi; Delphine Favry; Abdelilah Lahmar

doi:10.3390/ma16062197

Influence of the Addition of Rare Earth Elements on the Energy Storage and Optical Properties of Bi_0.5Na_0.5TiO₃-0.06BaTiO₃ Polycrystalline Thin Films

Materials (Basel). 2023 Mar 9;16(6):2197. doi: 10.3390/ma16062197.

Authors

Ilham Hamdi Alaoui¹, Mebarki Moussa¹, Nathalie Lemée¹, Françoise Le Marrec¹, Anna Cantaluppi¹, Delphine Favry¹, Abdelilah Lahmar¹

Affiliation

¹ Laboratory of Condensed Matter Physics, University of Picardie Jules Verne, 33 Rue Saint Leu, 80039 Amiens, France.

Abstract

Rare earth element-doped Bi_0.5Na_0.5TiO₃-BaTiO₃ (BNT-BT-RE) polycrystalline thin films were processed on a platinized substrate by chemical solution deposition. The microstructure, dielectric, and ferroelectric properties were investigated for all prepared films. It was found that the incorporation of rare earth elements into the BNT-BT matrix increases both the dielectric constant and the breakdown strength while maintaining low dielectric losses, leading to an enhancement of the energy storage density to W_rec = 12 and 16 J/cm³ under an effective field of E = 2500 kV/cm, for Nd- and Dy-based films, respectively. The optical properties of films containing the lanthanide element were investigated and the obtained results bear interest for luminescence applications. The simultaneous appearance of ferroelectric and optical properties in the system under investigation is very promising for advanced optoelectronic devices.

Keywords: BNT–BT thin films; dielectric measurements; energy storage; photoluminescence; rare earth addition.

Grants and funding

This work was supported by the Region of Hauts de France Grant No. 20002828 (project OPPEN). I.H.A. acknowledges financial support from the Region of Hauts de France and the Amiens Metropole.