A commercial approach for the fabrication of bulk and nano phosphors converted into highly efficient white LEDs
A commercial approach for the fabrication of bulk and nano phosphors converted into highly efficient white LEDs
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DOI：
10.1039/c4ra11318g
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发表时间：
2014-01-01
期刊：
影响因子：
3.9
通讯作者：
Gupta, Bipin Kumar
中科院分区：
文献类型：
--
作者：
Dwivedi, Jaya;Kumar, Pawan;Gupta, Bipin Kumar
在此，我们报告了一种策略，以合成一个高效的黄光发射Y3-xAl 5 O 12：Ce-x（x = 0.03至0.3）为基础的块体以及纳米（棒状）荧光粉，这是固态白色发光二极管（WLED）的主要组成部分。所合成的磷光体，以及其特征在于通过几个实验技术相关的材料表征和光谱。在468 nm的波长激发时，体相和纳米磷光体分别在549和530 nm处发射最大光致发光强度。与涂覆在WLED条上的市售块状磷光体相比，这些磷光体表现出更高的光致发光强度。此外，与市售的基于WLED的灯条、灯笼和手电筒相比，市售的InGaN蓝色LED灯条与合成的块状和纳米磷光体的集成展示了更好的CIE坐标和更低的色温以及高亮度（>81%量子产率）。这些高效发光磷光体是商业WLED应用中潜在用途的可行候选物。
Herein, we report a strategy to synthesize a highly efficient yellow light emitting Y3-xAl5O12:Ce-x (x = 0.03 to 0.3) based bulk as well as nano (rod-shaped) phosphors, which are the main component of solid state white light-emitting diodes (WLEDs). The as-synthesized phosphors were well characterized by several experimental techniques related to material characterization and spectroscopy. The bulk and nano phosphors emit with maximum photoluminescence intensities at 549 and 530 nm, respectively, upon excitation at a wavelength of 468 nm. These phosphors exhibit higher photoluminescence intensity as compared to commercially available bulk phosphors coated on WLED strips. Moreover, the integration of commercially available InGaN blue LED strips with the synthesized bulk and nano phosphors demonstrates better CIE coordinates and lower colour temperature with high brightness (>81% quantum yield) compared to commercially available WLED-based strips, lanterns and torches. These highly efficient light-emitting phosphors are a feasible candidate for potential use in commercial WLED applications.