Luminescence properties of Eu2+-activated KMg4(PO4)3 for blue-emitting phosphor
| Autor: | Xiaofang Lan, Wanjun Tang, Yuyan Chen, Qiaoqiao Wei |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Nephelauxetic effect
Materials science Photoluminescence business.industry Organic Chemistry Doping Analytical chemistry Phosphor Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Inorganic Chemistry Optoelectronics Photoluminescence excitation Electrical and Electronic Engineering Physical and Theoretical Chemistry Luminescence business Spectroscopy Powder diffraction Excitation |
| Zdroj: | Optical Materials. 34:1330-1332 |
| ISSN: | 0925-3467 |
| Popis: | A novel efficient blue-emitting phosphor, KMg4(PO4)3:Eu2+, was prepared by combustion-assisted synthesis method. The phase formation was confirmed by X-ray powder diffraction measurement. Photoluminescence excitation spectrum measurements show that its excitation band is extending from 250 to 420 nm. The luminescence shows a broad emission from the 4f65d → 4f7(8S7/2) transition at room temperature. Upon 289 nm light excitation, the phosphor exhibits a strong blue emission peaking at 442 nm. The doping mechanism of Eu2+ ions in KMg4(PO4)3 was discussed. The Eu2+ ions were suggested to occupy the K+ sites in KMg4(PO4)3 to induce the small crystal field splitting and weak nephelauxetic effect. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect