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Synthesis and warm white emission performance of single-component Ca7Mg2(PO4)6:Dy3+, Eu3+ phosphor for white light-emitting diodes.
- Source :
-
Ceramics International . Feb2024, Vol. 50 Issue 4, p7101-7109. 9p. - Publication Year :
- 2024
-
Abstract
- A single-component Ca 7 Mg 2 (PO 4) 6 :Dy3+, Eu3+ white-emitting phosphor was synthesized by a sol-gel approach. The effects of the amounts of Dy3+ ions and Eu3+ ions on the luminescence characteristics and crystal structure of Ca 7 Mg 2 (PO 4) 6 :Dy3+, Eu3+ were systematically investigated. The Ca 7 Mg 2 (PO 4) 6 :Dy3+, Eu3+ phosphors had a Ca 7 Mg 2 (PO 4) 6 structure with an R3c (161) space group. The Ca 7 Mg 2 (PO 4) 6 :Dy3+ phosphor showed emission peaks at both 484 nm (blue) and 576 nm (yellow), which led to the realization of white light. Furthermore, after codoping Eu3+ ions into the structure, a red emission peak (∼617 nm) appeared in the spectrum as a supplementary red component. A warm white light with a low correlated colour temperature (CCT) is obtained from Dy3+/Eu3+-codoped Ca 7 Mg 2 (PO 4) 6. The luminescence intensity at 483 K still reaches more than 73 % of that at 303 K. The packaged LEDs display a bright warm white light with CCT value and colour rendering index (CRI) of 3878 K and 86.7, respectively, which is comfortable for the human eye. With excellent luminescence performances, the white-emitting Ca 7 Mg 2 (PO 4) 6 :Dy3+, Eu3+ phosphor had a significant application potential in the w -LED field. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 02728842
- Volume :
- 50
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- Ceramics International
- Publication Type :
- Academic Journal
- Accession number :
- 174580553
- Full Text :
- https://doi.org/10.1016/j.ceramint.2023.12.072