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首页> 外文期刊>RSC Advances >A novel blue-emitting phosphor Gd4.67Si3O13:Bi3+ for near-UV LEDs
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A novel blue-emitting phosphor Gd4.67Si3O13:Bi3+ for near-UV LEDs

机译：用于近紫外LED的新型蓝色荧光粉Gd4.67Si3O13：Bi3 +

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A novel blue-emitting phosphor Gd4.67Si3O13:Bi3+ has been synthesized by a conventional high-temperature solid-state method. X-ray diffraction, and photoluminescence spectra were used to characterize the as-synthesized phosphor. Upon 370 nm excitation, the Gd4.67Si3O13:Bi3+ phosphor exhibits a broad emission band centered at 455 nm. Monitoring the 455 nm emission, the Gd4.67Si3O13:Bi3+ phosphor shows an intense broad absorption band ranging from 200 to 400 nm. The energy transfer mechanism between Bi3+ ions has been discussed, which is demonstrated to be dipole-dipole interaction. The critical concentration is 3 mol% and the critical distance is found to be 25.7 angstrom. The thermal stability and the CIE coordinates are also investigated in this work. The CIE coordinates of the Gd4.67Si3O13:Bi3+ phosphor upon 370 nm excitation are (0.141, 0.096). All the results indicate that the blue-emitting phosphor Gd4.67Si3O13:Bi3+ has potential applications for white LEDs.
机译：通过常规的高温固态方法合成了新型的发蓝光的磷光体Gd4.67Si3O13：Bi3 +。 X射线衍射和光致发光光谱用于表征合成后的荧光粉。在370 nm激发后，Gd4.67Si3O13：Bi3 +荧光粉显示出以455 nm为中心的宽发射带。监测455 nm的发射，Gd4.67Si3O13：Bi3 +荧光粉显示出200至400 nm的很强的宽吸收带。讨论了Bi3 +离子之间的能量转移机理，证明是偶极-偶极相互作用。临界浓度为3mol％，临界距离为25.7埃。在这项工作中还研究了热稳定性和CIE坐标。在370 nm激发下，Gd4.67Si3O13：Bi3 +荧光粉的CIE坐标为（0.141，0.096）。所有结果表明，发蓝光的磷光体Gd4.67Si3O13：Bi3 +在白光LED中具有潜在的应用。

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