Enhanced Luminescence and Thermal Stability in High Gd<sup>3+</sup>/Eu<sup>3+</sup> Co-Doped Ba<sub>3</sub>Y<sub>4</sub>O<sub>9</sub> Phosphors via Co-Precipitation Method
The co-precipitation method was successfully used to synthesize Ba<sub>3</sub>(Y<sub>0.6−x</sub>Gd<sub>0.4</sub>Eu<sub>x</sub>)<sub>4</sub>O<sub>9</sub> (0.01 ≤ x ≤ 0.09) phosphors with heavy Gd<sup>3+</sup> doping,...
Saved in:
| Main Authors: | , , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-02-01
|
| Series: | Molecules |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1420-3049/30/5/1085 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | The co-precipitation method was successfully used to synthesize Ba<sub>3</sub>(Y<sub>0.6−x</sub>Gd<sub>0.4</sub>Eu<sub>x</sub>)<sub>4</sub>O<sub>9</sub> (0.01 ≤ x ≤ 0.09) phosphors with heavy Gd<sup>3+</sup> doping, resulting in significantly enhanced thermal stability and luminescence performance. Structural analyses confirm that Gd<sup>3+</sup> and Eu<sup>3+</sup> ions substitute Y<sup>3+</sup> in the lattice, causing lattice expansion and improving crystal asymmetry, which enhances Eu<sup>3+</sup> emission. The incorporation of Gd<sup>3+</sup> creates efficient energy transfer pathways to Eu<sup>3+</sup> while suppressing non-radiative relaxation, leading to stable fluorescence lifetimes even at elevated temperatures. With a thermal activation energy of ~0.3051 eV, the Ba<sub>3</sub>(Y<sub>0.55</sub>Gd<sub>0.4</sub>Eu<sub>0.05</sub>)<sub>4</sub>O<sub>9</sub> phosphor exhibits superior resistance to thermal quenching compared to Ba<sub>3</sub>(Y<sub>0.95</sub>Eu<sub>0.05</sub>)<sub>4</sub>O<sub>9</sub> and many conventional red phosphors. Furthermore, the reduced color temperature and stable emission spectra across a wide temperature range highlight its potential for advanced lighting and display technologies in high-temperature environments. |
|---|---|
| ISSN: | 1420-3049 |