Tunable optical properties of Bi1/2Na1/2TiO3 materials via Sm1/2Na1/2TiO3 addition. (September 2021)

• Record Type: Journal Article
• Authors: Thoan, Nguyen Hoang; Lam, Nguyen Huu; Thu Hieu, Ha Thi; Hoang, Nguyen The; Van Vinh, Pham; Van Hao, Nguyen; Trung, Nguyen Ngoc; Van, Duong Quoc; Dung, Dang Duc
• Is Part Of: Vacuum. Volume 191(2021)
• Publication Date: 2021-09
• Subjects: Bi1/2Na1/2TiO3 -- Sm1/2Na1/2TiO3 -- Sol-gel -- Photoluminescence -- Solid solution; Vacuum -- Periodicals; 621.55
• DOI: 10.1016/j.vacuum.2021.110389
• Languages: English
• ISSNs: 0042-207X

Abstract

Abstract: In this work, the Sm1/2 Na1/2 TiO3 -addition Bi1/2 Na1/2 TiO3 materials as solid solutions were synthesized via a chemical route method. The X-ray diffraction and Raman scattering results indicated that Sm1/2 Na1/2 TiO3 materials were well solute into the host Bi1/2 Na1/2 TiO3 materials to form solid solutions. The optical bandgap of the pure Bi1/2 Na1/2 TiO3 materials was estimated from ultraviolet–visible spectroscopy of 3.07 eV. The bandgap slightly reduced to 2.94 eV as increasing the Sm1/2 Na1/2 TiO3 amounts up to 9 mol.%. Strong photoluminescence (PL) of Sm1/2 Na1/2 TiO3 -addition Bi1/2 Na1/2 TiO3 materials was obtained in the visible wavelength range of 550–750 nm which related to photoluminescence of Sm cations randomly incorporated into the host lattice of Bi1/2 Na1/2 TiO3 materials. Our work was promised to show a new method to integrate the PL properties in lead-free ferroelectric materials. Highlights: New solid solution (1− x )Bi1/2 Na1/2 TiO3 + x Sm1/2 Na1/2 TiO3 materials was synthesized. The optical band gap energy of Bi1/2 Na1/2 TiO3 materials were complex changed. The strong photoemission properties were obtained for 5 mol.% Sm1/2 Na1/2 TiO3 -modification Bi1/2 Na1/2 TiO3 compounds. This work demonstrated a new method to integrate photoemission in lead-free ferroelectric materials.