Alaoui Ilham Hamdi, Moussa Mebarki, Lemée Nathalie, Le Marrec Françoise, Cantaluppi Anna, Favry Delphine, Lahmar Abdelilah
Laboratory of Condensed Matter Physics, University of Picardie Jules Verne, 33 Rue Saint Leu, 80039 Amiens, France.
Materials (Basel). 2023 Mar 9;16(6):2197. doi: 10.3390/ma16062197.
Rare earth element-doped BiNaTiO-BaTiO (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 = 12 and 16 J/cm under an effective field of = 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.
通过化学溶液沉积法在镀铂衬底上制备了稀土元素掺杂的BiNaTiO-BaTiO（BNT-BT-RE）多晶薄膜。对所有制备的薄膜的微观结构、介电和铁电性能进行了研究。结果发现，将稀土元素掺入BNT-BT基体中，在保持低介电损耗的同时，提高了介电常数和击穿强度，使得在2500 kV/cm的有效电场下，基于Nd和Dy的薄膜的储能密度分别提高到12和16 J/cm³。研究了含镧系元素薄膜的光学性能，所得结果对发光应用具有重要意义。在所研究的体系中同时出现铁电和光学性能，这对先进光电器件来说非常有前景。
