VEENA LALAN - Academia.edu (original) (raw)
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Sree Sankaracharya University of Sanskrit,Kerala
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Papers by VEENA LALAN
Optical materials, Apr 1, 2024
Bulletin of Materials Science
Journal of Environmental Chemical Engineering
Journal of Science: Advanced Materials and Devices, Sep 1, 2022
In this work, thermally stable Y2O3:Eu3+ nanophosphors by organic mediated combustion technique u... more In this work, thermally stable Y2O3:Eu3+ nanophosphors by organic mediated combustion technique using dilute citric acid / citric acid mixed with diethylene glycol as fuel was prepared. The structural analysis establishes that these oxides crystallize into body-centered cubic structure with a space group la3. The nanophosphor prepared by citric acid with diethylene glycol as fuel exhibits better surface morphology and enhanced photoemission. The addition of polymeric precursors greatly enhanced the photoluminescence intensity of Y2O3: Eu phosphor by reducing the surface defects via the morphological control and improvement of crystallite growth. Investigations on temperature dependent photoluminescence studies reveal that the materials are thermally stable and the respective activation energy was 0.130 and 0.143 eV. The nanophosphor, fueled with diethylene glycol, exhibit remarkable CIE chromaticity coordinates (0.655, 0.345),in agreement with the National Television System Committe...
Journal of Science: Advanced Materials and Devices
Optical materials, Apr 1, 2024
Bulletin of Materials Science
Journal of Environmental Chemical Engineering
Journal of Science: Advanced Materials and Devices, Sep 1, 2022
In this work, thermally stable Y2O3:Eu3+ nanophosphors by organic mediated combustion technique u... more In this work, thermally stable Y2O3:Eu3+ nanophosphors by organic mediated combustion technique using dilute citric acid / citric acid mixed with diethylene glycol as fuel was prepared. The structural analysis establishes that these oxides crystallize into body-centered cubic structure with a space group la3. The nanophosphor prepared by citric acid with diethylene glycol as fuel exhibits better surface morphology and enhanced photoemission. The addition of polymeric precursors greatly enhanced the photoluminescence intensity of Y2O3: Eu phosphor by reducing the surface defects via the morphological control and improvement of crystallite growth. Investigations on temperature dependent photoluminescence studies reveal that the materials are thermally stable and the respective activation energy was 0.130 and 0.143 eV. The nanophosphor, fueled with diethylene glycol, exhibit remarkable CIE chromaticity coordinates (0.655, 0.345),in agreement with the National Television System Committe...
Journal of Science: Advanced Materials and Devices