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Orange phosphor Li2SrSiON2:Eu2+ for blue light chip based warm white LEDs

机译:橙色荧光粉Li2srsion2:Eu2 +用于蓝光芯片的暖白LED

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摘要

Oxynitride Li2SrSiON2 was synthesized by introducing N3- into the Li2SrSiO4 lattice, which is suitable for Eu2+ doping. It crystallizes in an trigonal structure with the space group of P3(1)21 (152) and cell parameter a = b = 5.0131(0) angstrom, c = 12.4270(1) angstrom and V = 270.46 angstrom(3). Under blue light (450 nm) excitation, the representative sample Li2Sr0.98SiON2:0.02Eu(2+) exhibits a bright broad band orange emission peaking at 586 nm with an external quantum efficiency of 52.7%. Its emission intensity at 150 degrees C remained 78% of that measured at 25 degrees C. Warm white light-emitting diode 1 (W-LED1) was prepared by combining a blue LED chip and LSSON:0.02Eu(2+). High color rendering index (R-a similar to 90) warm W-LED2 was fabricated by combing a blue light chip, BaSi2O2N2:Eu2+, and Li2Sr0.98SiON2:0.02Eu(2+). The chromaticity coordinate and correlated color temperature (CCT) of W-LED2 are (0.3625, 0.3539) and similar to 4386 K, respectively. Excellent optical properties allow it to be an attractive orange phosphor for warm W-LEDs.
机译:通过将N 3-进入Li2SRSiO 4格子来合成氧氮化物Li 2 Srsion2,其适用于EU2 +掺杂。它以三角结构结晶,具有P3(1)21(152)和细胞参数A = B = 5.0131(0)埃埃赫斯特罗姆,C = 12.4270(1)埃和V = 270.46埃(3)。在蓝光(450nm)激发下,代表性样品Li2SR0.98Sion2:0.02eu(2+)在586nm处显示出明亮的宽带橙色发射峰,外部量子效率为52.7%。其在150摄氏度下的发光强度保持在25摄氏度下测量的78%。通过组合蓝色LED芯片和Lsson:0.02eu(2+)来制备温暖的白色发光二极管1(W-LED1)。通过梳理蓝光芯片,Basi2O2N2:Eu2 +和Li2SR0.98Sion2:0.02eU(2+),制造高色渲染指数(R-A类似于90)温暖的W-LED2。 W-LED2的色度坐标和相关色温(CCT)(0.3625,0.3539)和类似于4386 k。优异的光学性质使其成为一个有吸引力的橙色磷光体,用于温暖的W-LED。

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  • 来源
    《RSC Advances》 |2017年第68期|共7页
  • 作者单位

    Lanzhou Univ Sch Phys Sci &

    Technol Dept Mat Sci Lanzhou Gansu Peoples R China;

    Lanzhou Univ Sch Phys Sci &

    Technol Dept Mat Sci Lanzhou Gansu Peoples R China;

    Lanzhou Univ Sch Phys Sci &

    Technol Dept Mat Sci Lanzhou Gansu Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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