SoS in Physics and Astrophysics, Pt. Ravishankar Shukla University, Raipur, (C.G.), India.
Department of Physics, Govt. Arts and Commerce Girls College, Devendra Nagar, Raipur, C. G., India.
Luminescence. 2023 May;38(5):576-584. doi: 10.1002/bio.4485. Epub 2023 Apr 2.
Dy -doped CaY Al SiO phosphors were prepared using the sol-gel method. X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), and energy dispersive spectroscopy analyses (EDS) were used to analyse the crystal structure, morphology, and elemental composition of the prepared samples. The luminescence behaviour of the sample was investigated using photoluminescence (PL) and thermoluminescence (TL) techniques. The prepared CaY Al SiO :xDy phosphor showed a characteristic blue and yellow emission at ~480 and 583 nm, respectively, with an excitation wavelength of 350 nm. The most intense PL emission was found for a 4 mol% doping concentration of Dy ions. The CIE diagram of the phosphor showed bluish-white colour emission. For TL studies, the prepared phosphors were irradiated with a Co γ (gamma) source and the TL glow curve of the CaY Al SiO :0.04Dy phosphor showed three overlapped peaks. For the Gaussian peaks, Chen's peak shape method was applied to determine the kinetic parameters of the samples.
采用溶胶-凝胶法制备了 Dy 掺杂的 CaYAlSiO 荧光粉。利用 X 射线衍射（XRD）、场发射扫描电子显微镜（FESEM）和能谱分析（EDS）对制备样品的晶体结构、形貌和元素组成进行了分析。利用光致发光（PL）和热致发光（TL）技术研究了样品的发光行为。在 350nm 的激发波长下，制备的 CaYAlSiO:xDy 荧光粉在~480nm 和 583nm 处分别表现出特征的蓝色和黄色发射。在 4mol%的 Dy 离子掺杂浓度下，观察到最强的 PL 发射。荧光粉的 CIE 图显示出蓝白色的发射颜色。对于 TL 研究，用 Coγ（伽马）源辐照制备的荧光粉，CaYAlSiO:0.04Dy 荧光粉的 TL 发光曲线显示出三个重叠的峰。对于高斯峰，应用 Chen 峰形法确定了样品的动力学参数。
