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Mn4+-activated Li3Mg2SbO6 as an ultrabright fluoride-free red-emitting phosphor for warm white light-emitting diodes

机译:MN4 +活化的Li3mg2SbO6作为无氟化物的无氟红发磷,用于温暖的白色发光二极管

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In this paper, we report on highly efficient Mn ~(4+) -activated double perovskite Li _(3) Mg _(2) SbO _(6) (LMS) red-emitting phosphors. These LMS:Mn ~(4+) phosphors can be efficiently excited over a broad wavelength band from 235 nm to 600 nm peaking at 344 nm and 469 nm, and exhibited an intense red emission band with a range from 600 nm to 800 nm centered around 651 nm. The optimal Mn ~(4+) doping concentration of LMS:Mn ~(4+) was 0.6 mol% and its internal quantum efficiency can reach as high as 83%. Besides, the thermal quenching effect on the optical property was also analyzed. Finally, a warm white light-emitting diode (WLED) lamp was fabricated by using a 454 nm InGaN blue LED chip combined with a blend of YAG:Ce ~(3+) yellow phosphors and the as-prepared LMS:0.6% Mn ~(4+) red phosphors, which showed bright white light with CIE chromaticity coordinates (0.4093, 0.3725), correlated color temperature (CCT = 3254 K), color rendering index (CRI = 81) and luminous efficacy (LE = 87 lm/W).
机译:在本文中,我们报告了高效的Mn〜(4+) - 活化的双钙钛矿Li _(3)Mg _(2)SBO_(6)(LMS)红发磷光体。这些LMS:Mn〜(4+)磷光体可以在335nm至600nm峰值的宽波长条带上有效激发在344nm和469nm的峰值上,并且呈现强烈的红色发射带,其范围为600nm至800nm大约651纳米。 LMS的最佳Mn〜(4+)掺杂浓度:Mn〜(4+)为0.6mol%,其内部量子效率可达高达83%。此外,还分析了对光学性质的热淬火效应。最后,通过使用454nm Ingan蓝色LED芯片与YAG的混合物结合使用温暖的白色发光二极管(WLOD)灯:Ce〜(3+)黄色磷光体和按摩为0.6%Mn〜 (4 +)红色磷光体,显示亮白光,具有CIE色度坐标(0.4093,0.3725),相关色温(CCT = 3254 k),显色指数(CRI = 81)和发光效率(Le = 87 Lm / W. )。

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