Organic fluorescent dyes supported on activated boron nitride: a promising blue light excited phosphors for high-performance white light-emitting diodes.

Organic fluorescent dyes supported on activated boron nitride: a promising blue light excited phosphors for high-performance white light-emitting diodes.
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活性氮化硼负载的有机荧光染料:一种用于高性能白光发光二极管的有前途的蓝光激发磷光体。

DOI:
10.1038/srep08492
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发表时间:
2015-02-16
期刊:
影响因子:
4.6
通讯作者:
Tang C
Tang C
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Li J;Lin J;Huang Y;Xu X;Liu Z;Xue Y;Ding X;Luo H;Jin P;Zhang J;Zou J;Tang C

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报道了一种高效的无稀土光转换材料,该材料是将有机荧光染料罗丹明B(RhB)和异硫氰酸荧光素(FITC)嵌入到活化的氮化硼(αBN)中形成复合荧光粉。该复合荧光粉显示出高效的Förster共振能量转移和大大提高的热稳定性,并且在466 nm蓝光激发下可以发射500-650 nm的宽可见波长。  通过用透明环氧树脂封装该复合荧光体和蓝色发光二极管(LED)芯片,可以实现具有优异的导热率、电流稳定性和光学性能的白色LED,即,导热率为0.36 W/cm 2,Commission Internationale de 1 'Eclairage色坐标为(0.32,0.34),发光效率为21.6 lm·W-1。  我们的研究为长寿命有机荧光染料基白色LED的实用化打开了大门。
We report an effective and rare-earth free light conversion material synthesized via a facile fabrication route, in which organic fluorescent dyes, i.e. Rhodamine B (RhB) and fluorescein isothiocyanate (FITC) are embedded into activated boron nitride (αBN) to form a composite phosphor. The composite phosphor shows highly efficient Förster resonance energy transfer and greatly improved thermal stability, and can emit at broad visible wavelengths of 500–650 nm under the 466 nm blue-light excitation. By packaging of the composite phosphors and a blue light-emitting diode (LED) chip with transparent epoxy resin, white LED with excellent thermal conductivity, current stability and optical performance can be realized, i.e. a thermal conductivity of 0.36 W/mk, a Commission Internationale de 1'Eclairage color coordinates of (0.32, 0.34), and a luminous efficiency of 21.6 lm·W−1. Our research opens the door toward to the practical long-life organic fluorescent dyes-based white LEDs.
活化氮化硼作为金属离子和有机污染物的有效吸附剂
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