Enhanced red luminescence from GdAl<sub>3</sub>(BO<sub>3</sub>)<sub>4</sub>: Pr<sup>3+</sup> phosphors under NUV excitation
The GdAl<sub>3</sub>(BO<sub>3</sub>)<sub>4</sub>:xPr<sup>3+</sup> (0 ≤ x ≤ 5.0 mol%) phosphors were prepared through solid state reaction route and characterized for various lighting applications. Powder X-ray diffraction investigations revel rhombohedral structure matched to JCPDS card no. 83-1907. The morphological studies confirm the agglomeration of particles with different size and shape. The emission spectra show various emission transitions originating from Pr<sup>3+</sup>:(<sup>3</sup>P<sub>1,0</sub>, <sup>1</sup>D<sub>2</sub>) emission states to their lower lying energy states upon 274 nm NUV excitation with a red shift for x > 0.5 mol%. The colour perception analysis results an intense red luminescence due to efficient energy transfer from Gd<sup>3+</sup> to Pr<sup>3+</sup> ions. The temperature-dependent luminescence investigations show good thermal stability even beyond 150°C with an activation energy of 0.24 eV. The observed experimental results show the potentiality of GdAl<sub>3</sub>(BO<sub>3</sub>)<sub>4</sub>:0.5 Pr<sup>3+</sup> phosphor for red emitting devices and red component in phosphor converted white LEDs.
Authors
- B.C. Jamalaiah (ORCID: https://orcid.org/0000-0002-8213-7793)
- N. Madhu
- Pedinti Shahab Khan (ORCID: https://orcid.org/0009-0006-4105-7208)
Institutions
- G Pulla Reddy Dental College & Hospital (IN)
Publication Details
- Journal
- Luminescence
- Published
- 2024-08-01
- DOI
- https://doi.org/10.1002/bio.4864
- Citations
- 2
- Primary Topic
- Luminescence Properties of Advanced Materials
- Type
- article
- Field-Weighted Citation Impact
- 0.23
Funders
- SRM Institute of Science and Technology
- Delhi Technological University