Optimization of luminescence properties of Tb3+-doped α-Sr2P2O7 phosphor synthesized by combustion m

• 作 者: Nimesh Prafulbhai Patel Mangalampalli Srinivas Dhaval Modi Vishwnath Verma Kota Venkata Ramana Murthy
• 机 构: Luminescence Material Laboratory, Department of Physics, Faculty of Science, The M. S. University of
• 出 处: 稀有金属（英文版）
• 发表日期: 2018年7期
• 关键词: Rare earth doping Strontium pyrophosphate β-Irradiation Photoluminescence Thermo

In this paper, thermoluminescence (TL) properties of rare earth Tb3+-doped α-Sr2P2O7 were examined after β-irradiation and photoluminescence (PL) properties of samples were examined for proper excita-tion. All the samples were synthesized by high-tempera-ture combustion method. The X-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopy characterization confirms the formation of pure α-phase with crystallized in orthorhombic structure of samples. The PL emission spectra of all samples exhibit charac-teristic green emission peaks of Tb3+ where the peak at 545 nm has the highest emission intensity for Tb3+ con-centration of 5.0 mol％. The TL glow curves of β-irradi-ated Tb3+-doped α-Sr2P2O7 phosphors were recorded at different heating rates of 2, 4, and 6 K?s-1. TL curves of all sample exhibit combination of two peaks: peak at 420 K shifts toward higher temperature, while peak at 525 K remains unaffected with the increase in Tb3+concentration as well as fading effect. The activation energy and kinetic parameters of the samples were eval-uated using thermoluminescence peak shape method.