Pr3+ and Tb3+ coactivated Na5Gd(WO4)4 showing tunable luminescence with high thermostability via modulation of excitation and temperature
| Autor: | R. Ye, Wang Guoqiang, Lin Yinhua, Y.N. Feng, Lingyan Li |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Photoluminescence Mechanical Engineering Metals and Alloys Analytical chemistry Phosphor 02 engineering and technology Crystal structure 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Wavelength chemistry.chemical_compound chemistry Mechanics of Materials Modulation Scheelite Materials Chemistry 0210 nano-technology Luminescence Excitation |
| Zdroj: | Journal of Alloys and Compounds. 779:41-48 |
| ISSN: | 0925-8388 |
| Popis: | In this work, Pr3+ and Tb3+ coactivated Na5Gd(WO4)4 (NGW) phosphors have been synthesized by high-temperature solid-state reactions and the scheelite crystal structure was determined for the first time. A color-tunable emission in NGW: Pr3+, Tb3+ phosphors can be realized by the modulation of excitation wavelengths, namely, the fluorescence intensity ratio of Pr3+ to Tb3+ in this material could be changed by different excitation. With increasing temperature, the luminescence of NGW: Pr3+, Tb3+ phosphor decreases almost linearly with the CIE coordinate variation from (0.306, 0.392) to ((0.375, 0.465) and result in the color of the photoluminescence variation from the blue-green to yellow. These results demonstrated that the investigated phosphors are attractive for application in display lighting and optical temperature sensing. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect