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Europium‐doped NaBaB9O15 phosphors with controllable blue/red dual-band emissions through self-reduction for plant growth LEDs
Journal of Luminescence ( IF 3.3 ) Pub Date : 2021-05-08 , DOI: 10.1016/j.jlumin.2021.118166
Xianfeng Lei , Gen Li , Min Zeng , Bozhi Zhou , Zhiming Yuan , Yongming Hu , Haoshuang Gu , Yuebin Li , Wei Chen

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.



中文翻译:

self掺杂的NaBaB 9 O 15磷光体具有通过自还原而可控制的蓝/红双波段发射,可用于植物生长LED

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。

更新日期:2021-05-12
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