TY - JOUR
T1 - Photoluminescence studies on dysprosium doped glass ceramics containing α-Na3AlF6 crystalline phase for white light emission
AU - Monisha, M.
AU - Hegde, Vinod
AU - Melanthota, Sindhoora Kaniyala
AU - Mazumder, Nirmal
AU - Sayyed, M. I.
AU - Al-Ghamdi, Hanan
AU - Almuqrin, Aljawhara H.
AU - Kamath, Sudha D.
N1 - Funding Information:
This research was funded by the Deanship of Scientific Research at Princess Nourah bint Abdulrahman University through the Fast-track Research Funding Program.
Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2021/12/1
Y1 - 2021/12/1
N2 - 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 treatment. 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 6H13/2 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 temperature have been evaluated for glass ceramics. With the formation of α-Na3AlF6 crystalline phase surrounded by Dy3+ ions, the PL properties in glass ceramics is enhanced notably. The obtained glass ceramics should be acknowledged as a promising material in white-LEDs and optoelectronic devices applications.
AB - 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 treatment. 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 6H13/2 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 temperature have been evaluated for glass ceramics. With the formation of α-Na3AlF6 crystalline phase surrounded by Dy3+ ions, the PL properties in glass ceramics is enhanced notably. The obtained glass ceramics should be acknowledged as a promising material in white-LEDs and optoelectronic devices applications.
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U2 - 10.1016/j.matchemphys.2021.125157
DO - 10.1016/j.matchemphys.2021.125157
M3 - Article
AN - SCOPUS:85114833778
SN - 0254-0584
VL - 274
JO - Materials Chemistry and Physics
JF - Materials Chemistry and Physics
M1 - 125157
ER -