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首页> 外文期刊>Japanese Journal of Applied Physics. Part 2, Letters >Structural change induced by thermal annealing of red-light-emitting ZnSnF6 center dot 6H(2)O:Mn4+ hexahydrate phosphor
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Structural change induced by thermal annealing of red-light-emitting ZnSnF6 center dot 6H(2)O:Mn4+ hexahydrate phosphor

机译:由发红光的ZnSnF6中心点6H(2)O:Mn4 +六水合物荧光粉的热退火引起的结构变化

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摘要

Effects of thermal annealing on the red-emitting ZnSnF6 center dot 6H(2)O: Mn4+ hexahydrate phosphor properties were investigated using X-ray diffraction measurement (XRD), photoluminescence (PL) analysis, and Raman scattering spectroscopy. Thermal annealing was performed at T-a = 50 to 400 degrees C in air for 1 h. Mn4+-related red emission wavelengths were redshifted about 5nm after annealing at T-a >= 200 degrees C with greatly decreased emission intensities. This change in PL spectral feature was attributed to the dehydration of the hexahydrate phosphor, supported by the XRD and Raman scattering results. The XRD and PL intensity analyses determined thermal decomposition energies of > 0.3 eV from the ZnSnF6 center dot 6H(2)O hexahydrate to anhydrate and of similar to 0.9 eV from the ZnSnF6 anhydrate to metallic fluorid/oxide (ZnF2/SnO2). A comparative discussion was given on the PL properties of two different Mn4+-activated phosphors, Ba-IV-F-6: Mn4+ anhydrate and Zn-IV-F-6 center dot 6H(2)O:Mn4+ hexahydrate phosphors with IV = Si, Ge, and Sn. (C) 2016 The Japan Society of Applied Physics
机译:使用X射线衍射测量(XRD),光致发光(PL)分析和拉曼散射光谱研究了热退火对发红光的ZnSnF6中心点6H(2)O:Mn4 +六水合物荧光粉性能的影响。在空气中,在T-a = 50至400摄氏度下进行热退火1小时。在T-a> = 200℃退火后,Mn4 +相关的红色发射波长发生了约5nm的红移,并且发射强度大大降低。 PL光谱特征的这种变化归因于六水合物磷光体的脱水,这受到XRD和拉曼散射结果的支持。 XRD和PL强度分析确定了从ZnSnF6中心点6H(2)O六水合物转变为无水物的热分解能> 0.3 eV,并且从ZnSnF6无水物转变为金属氟化物/氧化物(ZnF2 / SnO2)的热分解能为0.9 eV。对两种不同的Mn4 +活化磷光体(Ba-IV-F-6:Mn4 +无水合物和Zn-IV-F-6中心点6H(2)O:Mn4 +六水合物磷光体(IV = Si)的PL特性进行了比较讨论,Ge和Sn。 (C)2016年日本应用物理学会

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