Structural, optical and photoluminescence properties of K0.5Na0.5NbO3 ceramics synthesized by sol–gel reaction method
Source abstract
Abstract
Potassium sodium niobate (KNN) ceramics have been prepared by sol–gel route. The effect of conventional sintering on its optical and photoluminescence properties has been studied. Optical measurements were done by reflectance measurements of the ceramics which showed decrease in optical band gap energy with an increase in sintering temperature. A room temperature photoluminescence (PL) spectrum was taken at an excitation wavelength of 300 nm. The existence of green emission confirms the existence of oxygen vacancies in the sample. Raman spectroscopy analysis revealed changes in Raman scattering mode for KNN ceramics sintered at different temperatures. I–V characteristics have been studied from 20–180 V disclosed that increase in sintering temperature favor higher order of leakage current at room temperature.
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Research context
OpenAlex topics: Ferroelectric and Piezoelectric Materials · Perovskite Materials and Applications · Electronic and Structural Properties of Oxides
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