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首页> 外文期刊>Dyes and Pigments >A broad band yellow-emitting Sr8CaBi(PO4)(7):Eu2+ phosphor for n-UV pumped white light emitting devices
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A broad band yellow-emitting Sr8CaBi(PO4)(7):Eu2+ phosphor for n-UV pumped white light emitting devices

机译：宽带黄色发光SR8Cabi（PO4）（7）：EU2 + N-UV泵送白光发射器件的磷光体

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摘要

A novel broad band yellow-emitting Sr8CaBi(PO4)(7):Eu2+ (SCBP:Eu2+) phosphor was synthesized via conventional high-temperature solid-state reaction. It's crystal structure and phase were investigated with X-ray diffraction (XRD), Rietveld refinement method and transmission electron microscopy (TEM). The photoluminescence spectra as well as fluorescence decay curves were measured and discussed. The SCBP:Eu2+ phosphor can exhibit a broad excitation band in the range from 260 to 425 nm, while the emission spectrum exhibits a broad asymmetric yellow emission band peaking at 606 nm under 400 nm excitation. By analyzing their structure and fluorescence decay lifetimes, five different Eu2+ luminescence centers in SCBP:Eu2+ phosphor were confirmed. Then the concentration quenching mechanism as well as the thermal stability has been discussed in detail. Furthermore, a white LED lamp which can exhibit good performance has been fabricated via combining a 400 nm near-ultraviolet (n-UV) chip with the commercial BAM:Eu2+ phosphor and the present SCBP:0.04Eu(2+)sample. These results suggest that the SCBP:Eu2+ can be a promising yellow-emitting n-UV phosphor for white light emitting diodes.
机译：通过常规高温固相反应合成了一种新型的Sr8CaBi（PO4）（7）：Eu2+（SCBP:Eu2+）宽带黄色荧光粉。用X射线衍射（XRD）、里特维尔德细化法和透射电镜（TEM）对其晶体结构和物相进行了研究。测量并讨论了光致发光光谱和荧光衰减曲线。SCBP:Eu2+荧光粉可以在260-425nm范围内表现出宽的激发带，而发射光谱在400nm激发下表现出宽的不对称黄色发射带，峰值为606nm。通过分析它们的结构和荧光衰减寿命，确定了SCBP中五种不同的Eu2+发光中心：Eu2+荧光粉。然后详细讨论了其浓度猝灭机理和热稳定性。此外，通过将400nm近紫外（n-UV）芯片与商用BAM:Eu2+磷光体和目前的SCBP:0.04Eu（2+）样品相结合，制备了一种可表现出良好性能的白色LED灯。这些结果表明，SCBP:Eu2+是一种很有前途的用于白光发光二极管的黄色发光n-UV荧光粉。

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  • 来源
    《Dyes and Pigments》 |2018年第2018期|共8页
  • 作者

    Zhang Qiang; Wang Xicheng; Ding Xin; Wang Yuhua;

  • 作者单位

    Lanzhou Univ Natl &

    Local Joint Engn Lab Opt Convers Mat &

    Tec Key Lab Special Funct Mat &

    Struct Design Dept Mat Sci Sch Phys Sci &

    Technol Minist Educ Tianshui South Rd 222 Lanzhou 730000 Gansu Peoples R China;

    Lanzhou Univ Natl &

    Local Joint Engn Lab Opt Convers Mat &

    Tec Key Lab Special Funct Mat &

    Struct Design Dept Mat Sci Sch Phys Sci &

    Technol Minist Educ Tianshui South Rd 222 Lanzhou 730000 Gansu Peoples R China;

    Lanzhou Univ Natl &

    Local Joint Engn Lab Opt Convers Mat &

    Tec Key Lab Special Funct Mat &

    Struct Design Dept Mat Sci Sch Phys Sci &

    Technol Minist Educ Tianshui South Rd 222 Lanzhou 730000 Gansu Peoples R China;

    Lanzhou Univ Natl &

    Local Joint Engn Lab Opt Convers Mat &

    Tec Key Lab Special Funct Mat &

    Struct Design Dept Mat Sci Sch Phys Sci &

    Technol Minist Educ Tianshui South Rd 222 Lanzhou 730000 Gansu Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 染料及中间体工业;颜料工业;
  • 关键词

    SrsCaBi(PO4)(7); Eu2+; Photoluminescence; Yellow-emitting; White LED;

    机译：SRSCABI（PO4）（7）;EU2 +;光致发光;黄色发光;白色LED;

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