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Synthesis and luminescence characterization of Eu3+-doped Ca7Mg2(PO4)6 phosphor for eco-friendly white light-emitting diodes and thermoluminescence dosimetric applications
Luminescence ( IF 3.2 ) Pub Date : 2020-07-01 , DOI: 10.1002/bio.3900 Yatish R Parauha 1 , S J Dhoble 1
Luminescence ( IF 3.2 ) Pub Date : 2020-07-01 , DOI: 10.1002/bio.3900 Yatish R Parauha 1 , S J Dhoble 1
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A Eu3+-activated Ca7Mg2(PO4)6 phosphor was prepared at high temperature (800°C) using a solid-state reaction method. The crystal structure, phase formation of the prepared phosphor was characterized using X-ray diffraction patterns and Fourier transformed infrared analysis. The luminescence properties of the synthesized phosphor were characterized using photoluminescence and thermoluminescence techniques. The prepared phosphor showed two emission peaks at 594 nm with an orange colour due to the 5D0→7F1 transition and at 612 nm a red colour due to the 5D0→7F2 transition under 396 nm near-UV excitation. The prepared phosphors were irradiated with different doses of γ-rays from a 60Co gamma irradiation source. Thermoluminescence glow curves for this sample phosphor were obtained using a Nucleonix 1009I TL reader. Synthesized phosphor samples were exposed to a 3.6 kGy dose of γ-rays. The thermoluminescence glow curve of the Ca7Mg2(PO4)6:0.05 mol%Eu3+ phosphor showed maximum intensity at all concentrations of Eu3+ ions. The Ca7Mg2(PO4)6:0.05 mol%Eu3+ phosphor was irradiated with different doses of 60Co γ-irradiation and a linear response was observed between 0.6 kGy and 3.6 kGy. Trapping parameters such as activation energy, frequency factor and order of kinetics were calculated. The CIE chromaticity diagram showed the colour coordinates of the synthesized phosphor in the orange and red regions of the visible spectrum; this spectral feature revealed high colour purity and excellent chromaticity coordinate characteristics. Photoluminescence and thermoluminescence properties revealed that the prepared phosphor could be a potential red-emitting phosphor for eco-friendly white light generation and an excellent thermoluminescent dosimeter material for thermoluminescence dosimetric applications.
中文翻译：
Eu3+ 掺杂 Ca7Mg2(PO4)6 荧光粉的合成和发光表征，用于环保白光发光二极管和热致发光剂量学应用
采用固相反应法在高温（800℃）下制备了Eu 3+活化的Ca 7 Mg 2 (PO 4 ) 6荧光粉。使用 X 射线衍射图和傅里叶变换红外分析表征制备的荧光粉的晶体结构、相形成。使用光致发光和热致发光技术表征合成的荧光粉的发光特性。制备的荧光粉在 594 nm 处显示出两个发射峰，由于5 D 0 → 7 F 1跃迁而呈现橙色，而在 612 nm 处由于5 D 0 →跃迁而呈现红色396 nm 近紫外激发下的7 F 2跃迁。制备的荧光粉用来自60 Co γ 辐照源的不同剂量的 γ 射线辐照。使用 Nucleonix 1009I TL 阅读器获得了该样品磷光体的热致发光发光曲线。将合成的荧光粉样品暴露于 3.6 kGy 剂量的 γ 射线中。Ca 7 Mg 2 (PO 4 ) 6 :0.05 mol%Eu 3+磷光体的热释光辉光曲线在所有Eu 3+离子浓度下均显示出最大强度。Ca 7 Mg 2 (PO 4 ) 6 :0.05 mol%Eu 3+用不同剂量的60 Co γ-辐照对荧光粉进行辐照，在 0.6 kGy 和 3.6 kGy 之间观察到线性响应。计算了活化能、频率因子和动力学阶数等捕获参数。CIE色度图显示了合成荧光粉在可见光谱的橙色和红色区域的色坐标；这种光谱特征显示出高色纯度和出色的色度坐标特性。光致发光和热致发光性质表明，所制备的荧光粉可能是一种潜在的用于产生环保白光的红色荧光粉，也是一种用于热致发光剂量测定应用的优秀热致发光剂量计材料。
更新日期：2020-07-01
中文翻译：
Eu3+ 掺杂 Ca7Mg2(PO4)6 荧光粉的合成和发光表征，用于环保白光发光二极管和热致发光剂量学应用
采用固相反应法在高温（800℃）下制备了Eu 3+活化的Ca 7 Mg 2 (PO 4 ) 6荧光粉。使用 X 射线衍射图和傅里叶变换红外分析表征制备的荧光粉的晶体结构、相形成。使用光致发光和热致发光技术表征合成的荧光粉的发光特性。制备的荧光粉在 594 nm 处显示出两个发射峰，由于5 D 0 → 7 F 1跃迁而呈现橙色，而在 612 nm 处由于5 D 0 →跃迁而呈现红色396 nm 近紫外激发下的7 F 2跃迁。制备的荧光粉用来自60 Co γ 辐照源的不同剂量的 γ 射线辐照。使用 Nucleonix 1009I TL 阅读器获得了该样品磷光体的热致发光发光曲线。将合成的荧光粉样品暴露于 3.6 kGy 剂量的 γ 射线中。Ca 7 Mg 2 (PO 4 ) 6 :0.05 mol%Eu 3+磷光体的热释光辉光曲线在所有Eu 3+离子浓度下均显示出最大强度。Ca 7 Mg 2 (PO 4 ) 6 :0.05 mol%Eu 3+用不同剂量的60 Co γ-辐照对荧光粉进行辐照，在 0.6 kGy 和 3.6 kGy 之间观察到线性响应。计算了活化能、频率因子和动力学阶数等捕获参数。CIE色度图显示了合成荧光粉在可见光谱的橙色和红色区域的色坐标；这种光谱特征显示出高色纯度和出色的色度坐标特性。光致发光和热致发光性质表明，所制备的荧光粉可能是一种潜在的用于产生环保白光的红色荧光粉，也是一种用于热致发光剂量测定应用的优秀热致发光剂量计材料。
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