Energy transfer and luminescence properties of Ce³⁺/Dy³⁺ co-doped Sr₃SiO₅ phosphors for WLEDs

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• 作者：Kurugundla Gopi Krishna ; L. Krishna Bharat ; Jae Su Yu ; ^{jsyu@khu.ac.kr}
• 关键词：Phosphors ; Silicates ; Sol-gel ; Energy transfer ; Luminescence
• 刊名：Ceramics International
• 出版年：2017
• 出版时间：1 February 2017
• 年：2017
• 卷：43
• 期：2
• 页码：2586-2591
• 全文大小：1214 K
• 卷排序：43

文摘

The Sr3SiO5: Ce3+/Dy3+ phosphors were prepared via a citrate assisted sol-gel method. The prepared samples were characterized by X-ray diffraction pattern, scanning electron microscopy, Fourier transform infrared spectroscopy and fluorescence spectroscopy. When excited with near-ultraviolet (NUV) (360 nm) irradiation, the photoluminescence emission spectra showed a broad band blue emission of Ce3+ ions combined with the sharp emission peaks of Dy3+ ions. Energy transfer occurred between the Ce3+ and Dy3+ ions and it increased with the increase of Dy3+ ion concentration. The luminescence properties of the prepared phosphor materials could be adjusted by changing the concentration ratio of the Ce3+ and Dy3+ ions. The prepared phosphor materials also exhibited good thermal stability.