Abstract Red-emitting phosphors have attracted considerable interest for their applications in warm white light-emitting diodes (LEDs). A series of novel red emitting Eu3+-doped Ba2GdVO6 phosphors were prepared by a solid-state reaction annealed at 1300 °C for 6 h. Under the excitation of blue light (465 nm), Ba2GdVO6:Eu3+ phosphors emit pure red light. The critical distance at which concentration occurs is determined to be 8.7 A when the doping concentration reached up to 20 mol%. More importantly, the as-prepared Ba2GdVO6:20%Eu3+ phosphor exhibit good thermal stability. The PL intensity at 150 °C remains 72% of its initial intensity at room temperature. The preliminary studies show that the Ba2GdVO6:Eu3+ might be a promising red material for application in blue light converted warm white LED.

中文翻译：

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用于蓝光转换的暖白光 LED 的红光 Ba2GdVO6:Eu3+ 荧光粉

摘要 发红光的荧光粉因其在暖白光发光二极管 (LED) 中的应用而引起了极大的兴趣。通过在 1300°C 下退火 6 小时的固态反应制备了一系列新型的红色 Eu3+ 掺杂 Ba2GdVO6 荧光粉。在蓝光 (465 nm) 的激发下，Ba2GdVO6:Eu3+ 荧光粉发出纯红光。当掺杂浓度达到 20 mol% 时，发生浓缩的临界距离被确定为 8.7 A。更重要的是，所制备的 Ba2GdVO6:20%Eu3+ 荧光粉表现出良好的热稳定性。150 °C 时的 PL 强度保持在室温下初始强度的 72%。初步研究表明，Ba2GdVO6:Eu3+ 可能是一种很有前途的红色材料，可用于蓝光转换的暖白光 LED。