Photoluminescence at room temperature in disordered Ba0.50Sr0.50(Ti0.80Sn0.20)O3 thin films

Abstract

Photoluminescence (PL) properties at room temperature of disordered Ba0.50Sr0.50(Ti0.80Sn0.20)O3 (BST:Sn) thin films were obtained by the polymeric precursor method. X-ray diffraction data and corresponding PL properties have been measured using the 488nm line of an argon ion laser. The PL spectra of the film annealed at 350°C for 21h are stronger than those of the film annealed at 350°C for 28h, indicating a disorganized structure. The energy band gaps of the crystalline and amorphous BST:Sn thin films were 3.35 and 2.25eV, respectively. The doped BST thin films also tend to a cubic structure, resulting from TiO6 deformations.

Structural and relaxor behavior of (Ba1−xLax)(Ti0.85Sn0.15)O3 ceramics obtained by solid state reaction

“…The materials with DPT found applications in a variety of devices like piezoelectric actuators, multilayer capacitors, photoluminescence, non-volatile memories and pyroelectric detectors [24,25]. Recently, an analogues system Ba 0.5 Sr 0.5 (Ti 0.8 Sn 0.2 )O 3 , prepared by the polymeric precursor method were investigated exhibiting excellent structural, microstructural, electrical properties and photoluminescence [19,26]. Keyson et al [25] used domestic microwave oven for crystallization of this system and found improved photoluminescence properties in a reduced time as compared to the powders heat treated in the conventional furnace.…”

Electrical, optical and photoelectrochemical properties of BaSnO3−δ

“…In BaSnO 3 , the ions Sn 4+ occupy octahedral sites while Ba 2+ are located in dodecahedrons and the perfect oxide is white and exhibits an insulating behavior [20,21]. The conductivity ( ) is extremely low and could not be measured, it can be assumed to be less than 10 −8 −1 cm −1 .…”

Domestic microwave oven adapted for fast heat treatment of Ba0.5Sr0.5(Ti0.8Sn0.2)O3 powders

“…Recently, ferroelectric, dielectric and photoluminescent properties of Ba 0.5 Sr 0.5 (Ti 0. 8 with excellent structural, microstructural, electrical properties and photoluminescents [15,16].…”