Optical and dielectric studies for Tb3+/Sm3+ co-doped borate glasses for solid-state lighting applications
Singly doped Tb3+ and Sm3+ ions along with co-doped Tb3+/Sm3+ borate glasses have been fabricated by melt quenching technique. Both TGA and DSC curves were measured for exploration of thermal properties. Among all Tb3+/Sm3+ co-doped glasses, the (Tb0.5-Sm0.5) glass shows the highest emission intensi...
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| Language: | English |
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Elsevier
2018
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| Online Access: | http://psasir.upm.edu.my/id/eprint/75145/ http://psasir.upm.edu.my/id/eprint/75145/1/Optical%20and%20dielectric%20studies.pdf |
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| author | Albassam, Mohammed Fadil Lakshminarayana, Gandham Baki, Sharudin Omar Bashar, Kh. Bashar Kityk, Iwan V. Mahdi, Mohd Adzir |
| author_facet | Albassam, Mohammed Fadil Lakshminarayana, Gandham Baki, Sharudin Omar Bashar, Kh. Bashar Kityk, Iwan V. Mahdi, Mohd Adzir |
| author_sort | Albassam, Mohammed Fadil |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | Singly doped Tb3+ and Sm3+ ions along with co-doped Tb3+/Sm3+ borate glasses have been fabricated by melt quenching technique. Both TGA and DSC curves were measured for exploration of thermal properties. Among all Tb3+/Sm3+ co-doped glasses, the (Tb0.5-Sm0.5) glass shows the highest emission intensity with respect to others. A total of five emission bands where two are from Tb3+ transitions corresponding to 488 nm (blue) (5D4 → 7F6) and 543 nm (green) (5D4 → 7F5) are found. Three emission bands from Sm3+ at 563 nm (green), 599 nm (orange-red) and 645 nm (red) according to 4G5/2 → 6H5/2, 4G5/2 → 6H7/2, and 4G5/2 → 6H9/2 electronic transitions are identified. The calculated CIE chromaticity (x,y) coordinates for singly doped Tb3+ (Tb0.5) green emission, singly doped Sm3+ (Sm0.5) orange-red emission, and co-doped Tb3+/Sm3+ (Tb0.5-Sm0.5) yellow emission are (0.343, 0.584), (0.607, 0.389), and (0.438, 0.515), respectively, following the CIE 1931 chromaticity diagram. Further, dielectric features were studied for the Tb3+/Sm3+co-doped glass (Tb0.5-Sm0.5) in terms of dielectric constant, dielectric loss and AC conductivity with the increasing of frequency and temperature. |
| first_indexed | 2025-11-15T12:00:22Z |
| format | Article |
| id | upm-75145 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T12:00:22Z |
| publishDate | 2018 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-751452019-11-26T06:14:12Z http://psasir.upm.edu.my/id/eprint/75145/ Optical and dielectric studies for Tb3+/Sm3+ co-doped borate glasses for solid-state lighting applications Albassam, Mohammed Fadil Lakshminarayana, Gandham Baki, Sharudin Omar Bashar, Kh. Bashar Kityk, Iwan V. Mahdi, Mohd Adzir Singly doped Tb3+ and Sm3+ ions along with co-doped Tb3+/Sm3+ borate glasses have been fabricated by melt quenching technique. Both TGA and DSC curves were measured for exploration of thermal properties. Among all Tb3+/Sm3+ co-doped glasses, the (Tb0.5-Sm0.5) glass shows the highest emission intensity with respect to others. A total of five emission bands where two are from Tb3+ transitions corresponding to 488 nm (blue) (5D4 → 7F6) and 543 nm (green) (5D4 → 7F5) are found. Three emission bands from Sm3+ at 563 nm (green), 599 nm (orange-red) and 645 nm (red) according to 4G5/2 → 6H5/2, 4G5/2 → 6H7/2, and 4G5/2 → 6H9/2 electronic transitions are identified. The calculated CIE chromaticity (x,y) coordinates for singly doped Tb3+ (Tb0.5) green emission, singly doped Sm3+ (Sm0.5) orange-red emission, and co-doped Tb3+/Sm3+ (Tb0.5-Sm0.5) yellow emission are (0.343, 0.584), (0.607, 0.389), and (0.438, 0.515), respectively, following the CIE 1931 chromaticity diagram. Further, dielectric features were studied for the Tb3+/Sm3+co-doped glass (Tb0.5-Sm0.5) in terms of dielectric constant, dielectric loss and AC conductivity with the increasing of frequency and temperature. Elsevier 2018-12 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/75145/1/Optical%20and%20dielectric%20studies.pdf Albassam, Mohammed Fadil and Lakshminarayana, Gandham and Baki, Sharudin Omar and Bashar, Kh. Bashar and Kityk, Iwan V. and Mahdi, Mohd Adzir (2018) Optical and dielectric studies for Tb3+/Sm3+ co-doped borate glasses for solid-state lighting applications. Optical Materials, 86. 387 - 393. ISSN 0925-3467; ESSN: 1873-1252 https://www.sciencedirect.com/science/article/pii/S0925346718307109 10.1016/j.optmat.2018.10.033 |
| spellingShingle | Albassam, Mohammed Fadil Lakshminarayana, Gandham Baki, Sharudin Omar Bashar, Kh. Bashar Kityk, Iwan V. Mahdi, Mohd Adzir Optical and dielectric studies for Tb3+/Sm3+ co-doped borate glasses for solid-state lighting applications |
| title | Optical and dielectric studies for Tb3+/Sm3+ co-doped borate glasses for solid-state lighting applications |
| title_full | Optical and dielectric studies for Tb3+/Sm3+ co-doped borate glasses for solid-state lighting applications |
| title_fullStr | Optical and dielectric studies for Tb3+/Sm3+ co-doped borate glasses for solid-state lighting applications |
| title_full_unstemmed | Optical and dielectric studies for Tb3+/Sm3+ co-doped borate glasses for solid-state lighting applications |
| title_short | Optical and dielectric studies for Tb3+/Sm3+ co-doped borate glasses for solid-state lighting applications |
| title_sort | optical and dielectric studies for tb3+/sm3+ co-doped borate glasses for solid-state lighting applications |
| url | http://psasir.upm.edu.my/id/eprint/75145/ http://psasir.upm.edu.my/id/eprint/75145/ http://psasir.upm.edu.my/id/eprint/75145/ http://psasir.upm.edu.my/id/eprint/75145/1/Optical%20and%20dielectric%20studies.pdf |