Verma Tarkeshwari, Agrawal Sadhana
Department of Physics, National Institute of Technology Raipur, Raipur, 492010, India.
J Fluoresc. 2018 Jan;28(1):453-464. doi: 10.1007/s10895-018-2208-5. Epub 2018 Jan 16.
Eu doped and Dy codoped yttrium oxide (YO) phosphors have been prepared using solid-state reaction technique (SSR). The prepared phosphors were characterized by X-ray diffractometer (XRD), energy dispersive X-ray (EDX) spectroscopy, scanning electron microscopy (SEM) and Fourier transforms infrared spectroscopy (FTIR) techniques. Photoluminescence (PL) and Thermoluminescence (TL) properties were studied in detail. PL emission spectra were recorded for prepared phosphors under excitation wavelength 254 nm, which show a high intense peak at 613 nm for YO:Dy, Eu (1:1.5 mol %) phosphor. The correlated color temperature (CCT) and CIE analysis have been performed for the synthesized phosphors. TL glow curves were recorded for Eudoped and Dycodoped phosphors to study the heating rate effect and dose response. The kinetic parameters were calculated using peak shape method for UV and γ exposures through computerized glow curve deconvolution (CGCD) technique. The phosphors show second order kinetics and activation energies varying from 5.823 × 10 to 18.608 × 10 eV.
采用固态反应技术（SSR）制备了铕掺杂和镝共掺杂的氧化钇（YO）荧光粉。通过X射线衍射仪（XRD）、能量色散X射线（EDX）光谱、扫描电子显微镜（SEM）和傅里叶变换红外光谱（FTIR）技术对制备的荧光粉进行了表征。详细研究了光致发光（PL）和热释光（TL）特性。记录了制备的荧光粉在激发波长254 nm下的PL发射光谱，其中YO:Dy, Eu（1:1.5 mol%）荧光粉在613 nm处显示出高强度峰。对合成的荧光粉进行了相关色温（CCT）和CIE分析。记录了铕掺杂和镝共掺杂荧光粉的TL发光曲线，以研究加热速率效应和剂量响应。通过计算机化发光曲线反卷积（CGCD）技术，采用峰形法计算了紫外线和γ射线照射下的动力学参数。这些荧光粉表现出二级动力学，活化能在5.823×10至18.608×10 eV之间变化。
