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| Content Provider | Royal Society of Chemistry (RSC) |
|---|---|
| Author | Yu, Jae Su Du, Peng Guo, Yue Lee, Soo Hyun |
| Copyright Year | 2017 |
| Abstract | A series of Eu3+-activated Gd2MoO6 phosphors were synthesized via a citric acid-assisted sol–gel route. The photoluminescence (PL) excitation spectra revealed that the obtained phosphors can be efficiently pumped by both near-ultraviolet and blue light. Upon 360 and 463 nm excitation, bright emissions corresponding to the 5D0 → 7FJ (J = 0, 1, 2, 3 and 4) transitions of Eu3+ ions were detected. Meanwhile, the PL emission intensity was strongly dependent on the Eu3+ ion concentration and the optimal doping concentration for the Eu3+ ions in the Gd2MoO6 host lattice was determined to be around 15 mol%. The critical distance was around 11.47 Å and the mechanism for the concentration quenching was dominated by dipole–dipole interaction. Furthermore, the temperature-dependent PL emission spectra were recorded to test the thermal stability of the as-synthesized phosphors. Additionally, the Judd–Ofelt theory was employed to investigate the local crystal environment around the Eu3+ ions in the Eu3+-activated Gd2MoO6 phosphors. Finally, by integrating the resultant compounds with a blue light-emitting diode (LED) chip and yellow-emitting YAG:Ce3+ phosphors, a white light-emitting diode (WLED) device was fabricated which possessed a correlated color temperature of 5981 K, a color rendering index of 71.76 and a color coordinate of (0.321, 0.378). The results suggest that the Eu3+-activated Gd2MoO6 compounds are a promising red-emitting phosphor for WLEDs. |
| Starting Page | 3170 |
| Ending Page | 3178 |
| Page Count | 9 |
| File Format | HTM / HTML PDF |
| ISSN | 20462069 |
| Volume Number | 7 |
| Issue Number | 6 |
| Journal | RSC Advances |
| DOI | 10.1039/c6ra25652j |
| Language | English |
| Publisher | Royal Society of Chemistry |
| Access Restriction | Open |
| Subject Keyword | Photoluminescence Dopant Ion Emission intensity Light-emitting diode Color temperature Crystal structure |
| Content Type | Text |
| Resource Type | Article |
| Subject | Chemistry Chemical Engineering |
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