Novel blue-emitting phosphor NaMg4(PO4)3:Eu2+, Ce3+ with energy transfer
| Autor: | Lan Lijun, Tang Yan, Tang Wanjun, Feng Hongmei |
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| Rok vydání: | 2011 |
| Předmět: |
Materials science
Photoluminescence business.industry Organic Chemistry Analytical chemistry Phosphor Atomic and Molecular Physics and Optics Photon upconversion Electronic Optical and Magnetic Materials Ion Inorganic Chemistry Excited state Optoelectronics Photoluminescence excitation Electrical and Electronic Engineering Physical and Theoretical Chemistry Luminescence business Spectroscopy Powder diffraction |
| Zdroj: | Optical Materials. 34:175-178 |
| ISSN: | 0925-3467 |
| Popis: | A blue-emitting phosphor of NaMg 4 (PO 4 ) 3 :Eu 2+ , Ce 3+ was prepared by a combustion-assisted synthesis method. The phase formation was confirmed by X-ray powder diffraction measurement. Photoluminescence excitation spectrum measurements show that the phosphor can be excited by near UV light from 230 to 400 nm and presents a dominant luminescence band centered at 424 nm due to the 4f 6 5d 1 → 4f 7 transition of Eu 2+ ions at room temperature. Effective energy transfer occurs in Ce 3+ /Eu 2+ co-doped NaMg 4 (PO 4 ) 3 due to large spectral overlap between the emission of Ce 3+ and excitation of Eu 2+ . Co-doping of Ce 3+ enhances the emission intensity of Eu 2+ greatly by transferring its excitation energy to Eu 2+ , and Ce 3+ plays a role as a sensitizer. Ce 3+ –Eu 2+ co-doped NaMg 4 (PO 4 ) 3 powders can possibly be applied as blue phosphors in the fields of lighting and display. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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