Enhancing Photoluminescence Performance of SrSi2O2N2:Eu2+ Phosphors by Re (Re = La, Gd, Y, Dy, Lu, Sc) Substitution and Its Thermal Quenching Behavior Inves

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• 作者：Wei L眉 ; Mengmeng Jiao ; Baiqi Shao ; Lingfei Zhao ; Hongpeng You
• 刊名：Inorganic Chemistry
• 出版年：2015
• 出版时间：September 21, 2015
• 年：2015
• 卷：54
• 期：18
• 页码：9060-9065
• 全文大小：571K
• ISSN：1520-510X

文摘

Eu²⁺-doped SrSi₂O₂N₂ has recently been identified as a viable green phosphor that in conjunction with a blue-emitting diode can be used in solid-state white-lighting sources. In this study, we attempt to improve the photoluminescence and thermal quenching behavior by codoping Re³⁺ (Re = La, Gd, Y, Dy, Lu, Sc) and Li⁺ instead of Sr²⁺. Trivalent cation substitution at the Sr²⁺ site enhances the photoluminescence intensities and also achieves better thermal stability at high temperature. The lifetime decay properties in the related substituted phosphors are investigated. Furthermore, under the 460 nm blue light irradiation, this green phosphor exhibits excellent luminescence properties with absorption and internal/external efficiencies. High-color-rendition warm-white LEDs using the phosphor have the color temperature and color rendition of 4732 K and 91.2, respectively, validating its suitability for use in solid-state white lighting.