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首页> 外文期刊>Journal of Materials Science >Synthesis and luminescence properties of Sr2-xYxSi5-xAlxN8:Eu2+ red phosphor for white light-emitting diodes
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Synthesis and luminescence properties of Sr2-xYxSi5-xAlxN8:Eu2+ red phosphor for white light-emitting diodes

机译：SR2-XYXSI5-XALXN8的合成和发光性能：白色发光二极管的EU2 +红磷光体

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摘要

To improve the luminescence properties of Sr2Si5N8:Eu2+ phosphor, Sr2-xYxSi5-xAlxN8:Eu2+ specimens in which Sr2+ and Si4+ were partially substituted with Y3+ and Al3+ were prepared by carbothermal reduction nitridation. The obtained Sr2-xYxSi5-xAlxN8:Eu2+ samples showed standard Sr2Si5N8 structure. The effects of Y3+ and Al3+ partial substitution on the structures and luminescence properties of the resulting specimens were investigated. Under excitation by near UV and blue radiation, Sr2Si5N8:Eu2+ exhibited a broad emission band at about 613 nm, originating from the 4f(6)5d(1) - 4f(7) transition of Eu2+. As Eu2+ concentration increased, the emission peak positions red-shifted from 606 to 628 nm, occupying two different crystallographic sites labeled as Eu(Sr1) and Eu(Sr2). Also, incorporation of both Y3+ and Al3+ ions into Sr2Si5N8:Eu2+ significantly increased the luminescence intensity of Eu2+. This was attributed to modification of the crystal field environment of Eu2+. Overall, the improved luminescence intensities obtained through partial substitution of Sr2+ and Si4+ by Y3+ and Al3+, respectively, indicated the promise of Sr2-xYxSi5-xAlxN8:Eu2+ as red phosphor candidates in white light-emitting diodes at x = 0.16.
机译：为了改善Sr2Si5N8：Eu2 +磷光体的发光性能，通过碳热还原氮化制备其中Sr2-XyxSi5-XalXN8：Eu2 +标本，其中Sr2 +和Si 4 +部分被Y3 +和Al3 +制备。所得SR2-XYXSI5-XALXN8：EU2 +样品显示标准SR2SI5N8结构。研究了Y3 +和Al3 +部分取代对所得样品的结构和发光性质的影响。在近紫外线和蓝色辐射的激发下，SR2SI5N8：EU2 +在约613nm的宽度发射带上展出，源自4F（6）5d（1） - ＆ 4F（7）EU2 +的转变。随着EU2 +浓度的增加，发射峰位置从606偏移到628nm，占据标记为欧盟（SR1）和EU（SR2）的两个不同的晶体基位。此外，将Y3 +和Al3 +离子掺入SR2SI5N8：EU2 +显着增加了EU2 +的发光强度。这归因于eu2 +的晶体现场环境的修改。总体而言，通过Y3 +和Al3 +分别通过部分取代SR2 +和Si4 +获得的改进的发光强度，表明SR2-XYXSI5-XALXN8的承诺：EU2 +作为X = 0.16的白色发光二极管中的红色磷光体候选。

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  • 来源
    《Journal of Materials Science》 |2018年第14期|共9页
  • 作者

    Zhou Dongsheng; Zhang Wentao; Yan Guilin; Wang Yiyao; Xu Qi; Zhang Li;

  • 作者单位

    Chengdu Univ Technol Coll Mat &

    Chem &

    Chem Engn Chengdu 610059 Sichuan Peoples R China;

    Chengdu Univ Technol Coll Mat &

    Chem &

    Chem Engn Chengdu 610059 Sichuan Peoples R China;

    Chengdu Univ Technol Coll Mat &

    Chem &

    Chem Engn Chengdu 610059 Sichuan Peoples R China;

    Chengdu Univ Technol Coll Mat &

    Chem &

    Chem Engn Chengdu 610059 Sichuan Peoples R China;

    Chengdu Univ Technol Coll Mat &

    Chem &

    Chem Engn Chengdu 610059 Sichuan Peoples R China;

    Chengdu Univ Technol Coll Mat &

    Chem &

    Chem Engn Chengdu 610059 Sichuan Peoples R China;

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  • 正文语种 eng
  • 中图分类 工程材料学;
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