Monisha, M and Hegde, Vinod and Melanthota, Sindhoora Kaniyala and Mazumder, Nirmal and Sayyed, M I and Al-Ghamdi, Hanan and Almuqrin, Aljawhara H and Kamath, Sudha D (2021) Photoluminescence studies on dysprosium doped glass ceramics containing α-Na3AlF6 crystalline phase for white light emission. Materials Chemistry and Physics, 274. ISSN 0254-0584

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Abstract

The present work focuses on Dy3+ doped 20SiO2-(20-x) B2O3–10Al2O3–10ZnO–30NaF–10ZnF2 glass ceramics (GCs), a white light emitting material prepared by conventional melt-quenching technique and thermal treat�ment. The glass ceramics exhibited good morphological evolution of α-Na3AlF6 crystals at elevated temperatures. Bandgap values are obtained lower for glass ceramics compared to precursor glass which almost tends to come closer to the bandgap value of semiconductor. A good photoluminescence (PL) performance is monitored in glass ceramics with increased emission intensity having two dominant peaks at 482 and 575 nm. Stimulated emission cross section in glass ceramics obtained higher for the level 6 H13/2 characterize their significance in laser active media. Quantum efficiency is achieved greater than 80% for glass ceramics ensures their appropriateness for LEDs application. In particular, the yellow to blue intensity, colour coordinates and colour correlated temper

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