Photoluminescent properties of the monoclinic Ba2MgSi2O7:Eu2+ phosphor prepared by the combustion-assisted synthesis method

✍ Scribed by Yao, Shanshan ;Li, Yuanyuan ;Xue, Lihong ;Yan, Youwei

• Publisher: John Wiley and Sons
• Year: 2010
• Tongue: English
• Weight: 347 KB
• Volume: 207
• Category: Article
• ISSN: 0031-8965
• DOI: 10.1002/pssa.200925524

✦ Synopsis

Abstract

A blue–green emitting phosphor of the monoclinic Ba~2~MgSi~2~O~7~:Eu^2+^ was prepared by the combustion‐assisted synthesis method and an efficient bluish‐green emission under from ultraviolet to visible light was observed. The luminescence, crystallinity and particle sizes were investigated by using luminescence spectrometry, X‐ray diffractometry (XRD) and scanning electron microscopy (SEM). The emission spectrum shows a single intensive band centered at 498 nm, which corresponds to the 4f^6^5d^1^ → 4f^7^ transition of Eu^2+^. The excitation spectrum is a broad extending from 260 to 465 nm, which matches the emission of ultraviolet light‐emitting diodes (UV‐LEDs). The critical quenching concentration of Eu^2+^ in Ba~2~MgSi~2~O~7~:Eu^2+^ phosphor is about 0.05 mol. The corresponding concentration quenching mechanism is verified to be a dipole–dipole interaction. The result indicates that Ba~2~MgSi~2~O~7~:Eu^2+^ can be potentially useful as a UV radiation‐converting phosphor for white light‐emitting diodes (LEDs).