Europium‐doped NaBaB9O15 phosphors with controllable blue/red dual-band emissions through self-reduction for plant growth LEDs
Europium‐doped NaBaB9O15 phosphors with controllable blue/red dual-band emissions through self-reduction for plant growth LEDs
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DOI：
10.1016/j.jlumin.2021.118166
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发表时间：
2021-09
影响因子：
3.6
通讯作者：
Xianfeng Lei;Li Gen;Minghua Zeng;Bozhi Zhou;Zhiming Yuan;Yongming Hu;H. Gu;Yuebin Li;Wei Chen
中科院分区：
文献类型：
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作者：
Xianfeng Lei;Li Gen;Minghua Zeng;Bozhi Zhou;Zhiming Yuan;Yongming Hu;H. Gu;Yuebin Li;Wei Chen
采用传统的固相法在空气中成功地合成了新型的掺Eu的NaBaB9O15荧光粉。研究发现，由于电荷补偿和NaBaB9O15的刚性三维结构，即使在非还原气氛中，Eu3+离子也可以自发还原为Eu2+。Eu2+/Eu3+共掺的NaBaB9O15荧光粉在370-450 nm和580-750 nm波长范围内分别表现出蓝/红双频发射，这分别归因于Eu2+的5d-4f跃迁和Eu3+的4f-4f跃迁。通过改变合成条件，可以很容易地调节红/蓝发射强度之比，范围在0.07到2.67之间。重要的是，NaBaB9O15：Eu荧光粉的发射光谱与叶绿素的吸收峰匹配得很好。这项研究表明，这种双波段发光材料可能是室内植物生长LED的潜在候选者。
Novel Eu-doped NaBaB9O15phosphors 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 NaBaB9O15matrix. Eu2+/Eu3+co-doped NaBaB9O15phosphors 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.