Chatterjee, Raktima and Biswas, Kaushik and Das, Subrata and Tarafder, Anal (2026) Enhanced Fluorescence Property of Thermally Stable Dy3+-Activated Transparent BaAl2Si2O8 Nano Glass Ceramic Phosphor for WLEDs. Journal of Alloys and Compounds, 1065 (187960). ISSN 0925-8388
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This study focuses on developing Dy³⁺-doped 40SiO₂-14BaO-16Al₂O₃-12MgO-(8-x) La₂O₃−xDy₂O₃ transparent glass-ceramics (GCs) for warm white light applications. The processing involves conventional melt quenching followed by controlled heat treatment of the precursor glass to form desired-sized crystal phases. The optimal Dy³⁺ concentration was set at 0.5 mol%, after which quenching occurred, leading to a decline in fluorescence efficiency. To create transparent nano-crystalline glass ceramics, the optimized glass was heat-treated at 880°C for varying durations. XRD and morphological analyses confirmed nanoscale BaAl₂Si₂O₈ crystal formation and a phase transformation from hexagonal to monoclinic structure within the glass matrix. HR-TEM further confirmed the presence of two BaAl₂Si₂O₈ phases. The resulting glass ceramics showed a twofold increase in photoluminescence intensity compared to the precursor glass, attributed to the formation of BaAl₂Si₂O₈ surrounded by Dy³⁺ ions. Additionally, the higher activation energy of the GC (0.31 eV) sample indicates its high thermal stability, making it suitable for high-temperature applications. Therefore, the BaAl₂Si₂O₈ glass-ceramics developed here could be a promising material for thermally stable white LEDs. Keywords: Transparent glass-ceramics, Enhanced photoluminescence, thermal stability, white LEDs.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Transparent glass-ceramics, Enhanced photoluminescence, thermal stability, white LEDs. |
| Subjects: | Ceramic-Metal Systems Glass |
| Divisions: | Glass |
| Depositing User: | Ms Upasana Sahu |
| Date Deposited: | 22 Sep 2026 06:57 |
| Last Modified: | 22 Sep 2026 06:57 |
| URI: | https://cgcri.csircentral.net/id/eprint/5827 |
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