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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >A novel green-emitting phosphor Ba2Gd2Si4O13:Eu2+ for near UV-pumped light-emitting diodes
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A novel green-emitting phosphor Ba2Gd2Si4O13:Eu2+ for near UV-pumped light-emitting diodes

机译：用于近紫外泵浦发光二极管的新型绿色荧光粉Ba2Gd2Si4O13：Eu2 +

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摘要

A novel green-emitting phosphor Ba2Gd2Si4O13:Eu2+ has been prepared using a conventional high-temperature solid-state method. X-ray diffraction and photoluminescence spectra were used to characterize the as-synthesized phosphor. The Ba2Gd2Si4O13:Eu2+ phosphor exhibits a broad emission band centered at 503 nm under 365 nm excitation. Monitoring the 503 nm emission, the Ba2Gd2Si4O13:Eu2+ phosphor shows an intense broad excitation band ranging from 200 to 410 nm. The concentration quenching mechanism has been investigated, and demonstrated to involve a dipole-dipole interaction. The critical concentration was found to be about 4 mol%. The critical distance calculated using the concentration method and spectral overlap method was 23.9 angstrom and 27.1 angstrom, respectively. The temperature-dependent photoluminescence and CIE chromaticity coordinate of the Ba2Gd2Si4O13:Eu2+ phosphor were also investigated in this work. The results revealed that Ba2Gd2Si4O13:Eu2+ possesses excellent thermal stability and the CIE value of the Ba2Gd2Si4O13:0.04 Eu2+ phosphor upon 365 nm excitation is (0.211, 0.434), located in the green region. All the properties indicate that the Ba2Gd2Si4O13:Eu2+ phosphor is a potential green-emitting phosphor fit for ultraviolet light pumped LEDs.
机译：使用常规的高温固态方法已经制备了新型的绿色发光磷光体Ba 2 Gd 2 Si 4 O 13：Eu 2+。 X射线衍射和光致发光光谱用于表征合成后的磷光体。 Ba2Gd2Si4O13：Eu2 +荧光粉在365 nm激发下显示出以503 nm为中心的宽发射带。 Ba2Gd2Si4O13：Eu2 +荧光粉监测503 nm发射，显示出200至410 nm的强烈宽激发带。已经研究了浓度猝灭机理，并证明其涉及偶极-偶极相互作用。发现临界浓度为约4mol％。使用浓度法和光谱重叠法计算的临界距离分别为23.9埃和27.1埃。在这项工作中，还研究了Ba2Gd2Si4O13：Eu2 +荧光粉的温度依赖性光致发光和CIE色度坐标。结果表明，Ba2Gd2Si4O13：Eu2 +具有良好的热稳定性，在365 nm激发下，Ba2Gd2Si4O13：0.04 Eu2 +荧光粉的CIE值为（0.211，0.434），位于绿色区域。所有特性表明，Ba2Gd2Si4O13：Eu2 +荧光粉是一种适合发射紫外光的LED的潜在绿色发光荧光粉。

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