Preparation and luminescence properties of Li2MgZrO4:Mn4+ red phosphor for plant growth
Preparation and luminescence properties of Li2MgZrO4:Mn4+ red phosphor for plant growth
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植物生长用Li2MgZrO4:Mn4红色荧光粉的制备及其发光性能
DOI：
10.1016/j.jlumin.2017.05.002
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发表时间：
2017-08-01
影响因子：
3.6
通讯作者：
Liu, Pan
中科院分区：
文献类型：
--
作者：
Cao, Renping;Shi, Zhihui;Liu, Pan
采用高温固相反应法在空气中制备了新型双钙钛矿结构Li 2 MgZrO 4：Mn 4+（LMZ：Mn 4+）荧光粉。在220-600 nm范围内，LMZ：Mn ~（4+）荧光粉的激发峰分别位于335、395和482 nm处，这是由于O ~ 2--Mn ~（4+）的电荷转移和Mn ~（4+）离子的（4）A（2）→ T ~（4+）（1）、T ~（2+）和T ~（4+）（2）跃迁所致。LMZ：Mn ~（4+）荧光粉在610-790 nm范围内的670 nm发射峰归属于Mn ~（4+）离子的E-2 ->（4）A（2）跃迁，表明LMZ：Mn ~（4+）荧光粉在植物生长用红色发光二极管中具有应用前景。LMZ：Mn ~（4+）荧光粉中Mn ~（4+）离子的最佳浓度为0.4mol%。在室温下，LMZ：0.4%Mn ~（4+）荧光粉的荧光寿命和量子效率分别为251.47 μ s和32.3%。通过结构坐标示意图说明了温度对发光性能的影响。用Mn ~（4+）的能级图解释了发光机理。
Novel double perovskite Li2MgZrO4:Mn4+(LMZ:Mn4+) phosphor is prepared by high-temperature solid-state reaction method in air. Excitation bands peaking at 335, 395, and 482 nm of LMZ:Mn4+ phosphor in the range of 220-600 nm are attributed to the O2--Mn4+ charge transfer and the (4)A(2)-> T-4(1), T-2(2), and T-4(2) transitions of Mn4+ ion, respectively. Emission band peaking at 670 nm of LMZ:Mn4+ phosphor within the range 610-790 nm is assigned to the E-2 ->(4)A(2) transition of Mn4+ ion with host lattice vibration, which indicate that LMZ:Mn4+ phosphor has an application prospect in the red light-emitting diodes for plant growth. The optimal Mn4+ ion concentration in LMZ:Mn4+ phosphor is similar to 0.4 mol%. Fluorescence lifetime and quantum efficiency of LMZ:0.4%Mn4+ phosphor are similar to 251.47 mu s and 32.3% at room temperature, respectively. The influence of temperature to luminescence properties is explained by the schematic configuration coordinate diagram. The luminous mechanism is explained by the energy level diagram of Mn4+.