On the microstructure and optical properties of Ba0.5Sr0.5TiO3 films

Structure and Optical Properties of SrTiO3 Thin Films Prepared by a Sol–Gel Technique

“…They thought that the shift of band gap is due to both the quantum-size effect and amorphous effect. Tcheliebou et al [20] also believed that a small amount of amorphous phase existed in the thin films and reported a high E g 232 Dinghua Bao, Heqing Yang, Liangying Zhang, and Xi Yao value of 3.96 eV for Ba 0X5 Sr 0X5 TiO 3 thin films [20]. Some other researchers have explained the shift of optical band gap in terms of a quantum-size effect in semiconducting thin films [21,22].…”

UV-visible Spectra and Conductive Property of Mn-doped BaTiO3and Ba0.93Sr0.07TiO3Ceramics

“…Besides piezoelectric and pyroelectric applications of ferroelectrics, ferroelectric materials also exhibit interesting optical effects. Optical properties of Ba 1−x Sr x TiO 3 (barium strontium titanate, abbreviated as BST) thin films and BaTiO 3 ceramics have been reported [11][12][13][14]. On the other hand, there is no more detailed information about the correlation between ultraviolet-visible (UV-vis) spectra and conductance of these systems.…”

Structural properties and dopant-modified bandgap energies of Ba0.5 Sr 0.5 TiO 3 thin films grown on LaAlO 3 substrates

“…Therefore, an increase in the bandgap energy of semiconductor thin films could be assigned to the quantum-size effect when the crystallite size became very small [21,22]. The existence of amorphous phase and polycrystalline domains will modify the bandgap [23]. The modification of bandgap energy by stress in the thin films has been reported [24,25].…”