Sr3Bi(PO4)3:Eu2+, Mn2+: Single-phase and color-tunable phosphors for white-light LEDs
| Autor: | Anyi Lan, Yanxia Liu, Xiao Zhang, Guiqiang Chen, Yue Jin |
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| Rok vydání: | 2015 |
| Předmět: |
Dopant
Chemistry Organic Chemistry Analytical chemistry Phosphor Fluorescence Atomic and Molecular Physics and Optics Photon upconversion Electronic Optical and Magnetic Materials Ion Inorganic Chemistry Emission spectrum Electrical and Electronic Engineering Physical and Theoretical Chemistry Luminescence Spectroscopy Powder diffraction |
| Zdroj: | Optical Materials. 40:122-126 |
| ISSN: | 0925-3467 |
| Popis: | Sr3Bi(PO4)3:Eu2+, Sr3Bi(PO4)3:Mn2+, and Sr3Bi(PO4)3:Eu2+, Mn2+ phosphors were synthesized by solid state reaction. The structure and luminescent characteristics were investigated by X-ray powder diffraction and fluorescent spectrophotometer. All samples have the structural type of eulytine. The excitation and emission spectra of Sr3Bi(PO4)3:0.01Eu2+ sample show characteristic bands of Eu2+ ions. Also, the excitation and emission spectra of Sr3Bi(PO4)3:0.06Mn2+ sample show characteristic bands of Mn2+ ions. The emission color of Sr3Bi(PO4)3:Eu2+, Mn2+ sample could be tuned through tuning the co-dopant concentration of Mn2+ ions. The decay times for the Eu2+ ions decrease with the increase of Mn2+ dopant concentration, but the energy transfer efficiency increases with the increase of Mn2+ dopant concentration. On the basis of the luminescent spectra and fluorescence decay curves, we confirm that the energy transfer process from the Eu2+ to Mn2+ ions takes place in the co-doped Sr3Bi(PO4)3 phosphor. Sr3Bi(PO4)3:Eu2+, Mn2+ sample shows the good thermostability. The emission intensity of the sample at 400 K is about 60% of the value at 300 K. These results show Sr3Bi(PO4)3:Eu2+, Mn2+ phosphors could be anticipated for UV-pumped white-light-emitting diodes. |
| Databáze: | OpenAIRE |
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