Heliyon · 2022 · 60 citations · 29 references
Natural SciencesMaterials EngineeringMaterials ScienceCeramic MaterialsCeramicsMaterials CharacterizationCeramic MorphologyElectrical Properties Of CeramicsOptical CeramicsPerovskite MaterialsRare-earth-doped MaterialsStructural CeramicsBarium TitanateBarium Titanate CeramicsDoping Effects On Electrical PropertiesMicrostructural CharacterizationOptical PropertiesSol-gel ProcessingTetragonal SystemX-ray Diffraction Analysis
concentration further. The microstructural study from FESEM depicts the uniform distribution of compact and well-faceted grain growth for Y-BT in contrast with undoped barium titanate. The average grain size (∼0.29-0.78 μm) of the Y-BT decreases with increasing doping concentration. Frequency-dependent impedance analyses show enhanced dielectric properties like dielectric constant, quality factor, and conductivity with low dielectric loss in the presence of Yttrium. The optical bandgap energy (∼2.63-3.72 eV) estimated from UV-Vis-NIR diffuse reflection data shows an increasing trend with a higher concentration of yttrium doping.
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Optical Properties and Electronic Structure of Amorphous Germanium
J. Tauc, R. Grigorovici, A. Vancu · physica status solidi (b) · 1966 · 10.7K citations