Novel Eu-doped NaBaB₉O₁₅ phosphors were successfully prepared by a traditional solid-phase method in air. It is found that Eu³⁺ ions can be reduced to Eu²⁺ spontaneously even in a non-reducing atmosphere due to the charge compensation and the rigid three-dimensional structure of the NaBaB₉O₁₅ matrix. Eu²⁺/Eu³⁺ co-doped NaBaB₉O₁₅ phosphors exhibit blue/red dual-band emission in the 370–450 nm and 580–750 nm wavelength regions, attributed to the 5d-4f transition of Eu²⁺ and the 4f-4f transition of Eu³⁺, respectively. The ratio of red/blue emission intensities can be easily tuned by changing the synthesis conditions, ranging from 0.07 to 2.67. Importantly, the emission bands of NaBaB₉O₁₅:Eu phosphors match well with the absorption peaks of chlorophyll. This study suggests that this dual-band emitting phosphors might be a potential candidate for indoor plant growth LEDs.

通过传统固相法在空气中成功制备了新型的Eu掺杂NaBaB ₉ O ₁₅荧光粉。已经发现，由于NaBaB ₉ O ₁₅基质的电荷补偿和刚性三维结构，即使在非还原性气氛中，Eu ³⁺离子也可以自发地还原为Eu ²⁺。Eu ²⁺ / Eu ³⁺共掺杂的NaBaB ₉ O ₁₅磷光体在370-450 nm和580-750 nm波长范围内呈现蓝/红双波段发射，这归因于Eu ²⁺的5d-4f跃迁和Eu ^3+的4f-4f转变， 分别。可以通过在0.07至2.67范围内更改合成条件来轻松调整红色/蓝色发射强度的比率。重要的是，NaBaB ₉ O ₁₅：Eu荧光粉的发射带与叶绿素的吸收峰很好地匹配。这项研究表明，这种双波段发射磷光体可能是室内植物生长LED的潜在候选者。