Abstract A series of Eu2+ and Mn2+ co-activated Al5O6N multi-color phosphors were fabricated through the gas-pressure sintering method, and they displayed intense blue-green emitting at near-ultraviolet irradiation due to efficient energy transfer. Dipole-dipole interaction was proved to be the leading role for Eu2+-Mn2+energy transfer and the highest energy transfer efficiency was obtained about 78 %. Furthermore, tunable emissions from blue to green were observed through regulating the concentration of Eu2+ and Mn2+. In addition, the temperature-dependent luminescence behavior of Al5O6N:Eu2+, Mn2+ was examined, and the emission intensity at 150℃ maintains 82 % of initial intensity, which indicates superior thermal stability. These outcomes illustrate that the Al5O6N: Eu2+, Mn2+ phosphors may be potentially used in white LEDs.

中文翻译：

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白光 LED 通过 Eu2+ 的高效能量转移实现 Mn2+ 的近紫外光激发

摘要 采用气压烧结法制备了一系列Eu2+和Mn2+共激活Al5O6N多色荧光粉，由于有效的能量转移，它们在近紫外辐射下显示出强烈的蓝绿色光。偶极-偶极相互作用被证明是 Eu2+-Mn2+ 能量转移的主导作用，最高能量转移效率约为 78%。此外，通过调节 Eu2+ 和 Mn2+ 的浓度，观察到从蓝色到绿色的可调发射。此外，还考察了 Al5O6N:Eu2+、Mn2+ 的温度依赖性发光行为，150℃下的发光强度保持初始强度的 82%，表明具有优异的热稳定性。这些结果说明 Al5O6N:Eu2+、Mn2+ 磷光体可能用于白光 LED。