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首页> 外文期刊>RSC Advances >Luminescence properties and energy transfer investigations of Ba2La2.85?xTb0.15Eux(SiO4)3F multicolor phosphor
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Luminescence properties and energy transfer investigations of Ba2La2.85?xTb0.15Eux(SiO4)3F multicolor phosphor

机译：Ba2La2.85？xTb0.15Eux（SiO4）3F多色荧光粉的发光性质和能量转移研究

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摘要

The Ba _(2) La _(2.85? x ) Tb _(0.15) Eu _( x ) (SiO _(4) ) _(3) F (BLSOF:0.15Tb ~(3+) , x Eu ~(3+) ) multicolor phosphors with apatite structure were synthesized via the solid-state pathway. The crystal structure and luminescence properties of the phosphors were investigated by means of scanning electron microscopy (SEM), X-ray diffraction (XRD), Rietveld refinement, photoluminescence excitation (PLE) and photoluminescence (PL). The luminescence performance of the phosphor was optimum when the concentration of Tb ~(3+) was set to be 0.15 mol and the concentration of Eu ~(3+) was set to be 0.22 mol. Under the accurate excitation of 373 nm near ultraviolet (n-UV) light, the emitting color of the phosphors can be tuned from green to red with increasing Eu ~(3+) /Tb ~(3+) ratio. It was further proved that the quadrupole–quadrupole (q–q) interaction is responsible for the energy transfer (ET) in the BLSOF:0.15Tb ~(3+) , 0.22Eu ~(3+) phosphor. Owing to the excellent thermal quenching luminescence property, the BLSOF:0.15Tb ~(3+) , x Eu ~(3+) phosphor can be applied in n-UV white light emitting diodes (w-LEDs) and serve as the warm part of warm white light.
机译：Ba _（2）La _（2.85？x）Tb _（0.15）Eu _（x）（SiO _（4））_（3）F（BLSOF：0.15Tb〜（3+），x Eu〜（通过固态途径合成了具有磷灰石结构的3+））多色磷光体。通过扫描电子显微镜（SEM），X射线衍射（XRD），Rietveld精细化，光致发光激发（PLE）和光致发光（PL）研究了磷光体的晶体结构和发光特性。当将Tb〜（3+）的浓度设为0.15 mol，将Eu〜（3+）的浓度设为0.22 mol时，荧光粉的发光性能最佳。在373 nm的近紫外（n-UV）光的精确激发下，随着Eu〜（3+）/ Tb〜（3+）比的增加，磷光体的发射颜色可以从绿色变为红色。进一步证明四极-四极（q-q）相互作用是BLSOF中的能量转移（ET）的原因：0.15Tb〜（3+），0.22Eu〜（3+）荧光粉。 BLSOF：0.15Tb〜（3+），x Eu〜（3+）荧光粉由于具有出色的热猝灭发光特性，因此可用于n-UV白光发光二极管（w-LEDs）中并用作温暖的部分的白光。

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