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• W4309698075 abstract "Single crystals of undoped and Nb doped sodium and potassium-bismuth titanate at the morphotropic phase boundary (MPB) composition [(Na0.41K0.09Bi0.50)TiO3: NKBT] were grown from high temperature solutions. The effect of Nb doping on the electronic property of NKBT was investigated by optical transmission and photoelectron spectroscopy (PES). The optical absorption shows that the bandgap having the lowest energy is indirect in nature and increases with the increase in the Nb concentration in the lattice. The estimated Urbach energy increases with the increase of Nb concentration signifying an increase in the disorder in the lattice on Nb doping. The PES revealed that the valence band maxima (VBM) exhibit red shift on Nb doping. It also revealed the presence of in-gap states probably due to Ti3+ defect and oxygen vacancy. Moreover, inline with the optical measurement, the PES showed that there is a decrease in the energy gap between the VBM and defect state with the Nb doping. Furthermore, the angle resolved PES measurement confirmed the presence of both the direct and indirect bandgaps in the crystal." @default.
• W4309698075 created "2022-11-29" @default.
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• W4309698075 date "2022-11-22" @default.
• W4309698075 modified "2023-09-23" @default.
• W4309698075 title "Effect of Nb substitution on the electronic property of lead-free piezoelectric (Na_0.41K_0.09Bi_0.50)TiO₃ single crystal: Optical absorption and photoelectron study" @default.
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• W4309698075 doi "https://doi.org/10.1063/5.0124508" @default.
• W4309698075 hasPublicationYear "2022" @default.
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