Novel red-emitting phosphor Li2MgZrO4:Mn4+,Ga3+ for warm white LEDs based on blue-emitting chip
| Autor: | Siguo Xiao, Xiaoliang Yang, Wen Yan |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Dopant business.industry General Chemical Engineering Doping Phosphor 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Ion law.invention law Optoelectronics Thermal stability 0210 nano-technology business Luminescence Excitation Light-emitting diode |
| Zdroj: | RSC Advances. 9:5354-5361 |
| ISSN: | 2046-2069 |
| DOI: | 10.1039/c8ra09933b |
| Popis: | Li2MgZrO4:Mn4+,Ga3+ phosphors are synthesized via a conventional high-temperature solid-state reaction. The red emission of Mn4+ is enhanced 6.68 times and 13.0 times under 352 nm and 468 nm excitation when Ga3+ ions with a concentration of 40% are introduced into the phosphor. The thermal stability of the phosphor is also slightly improved by Ga3+ doping. It is believed that the GaZr dopants in the Li2MgZrO4 host not only stabilize Mn ions in the 4+ state, but also lower the symmetry of Mn4+ sites, resulting in the significant improvement of the luminescence performance, especially under blue excitation. The results might provide meaningful reference to seek high-performance Mn4+ doped oxide phosphors for W-LED applications based on a blue-emitting InGaN chip. |
| Databáze: | OpenAIRE |
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