Emission spectra of MgSO4:Dy,MgSO4:Tm and MgSO4:Dy,Mn phosphors |
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| Institution: | 1. Department of Physics, Zhongshan University, Guangzhou, 510275, People''s Republic of China;2. State Key Laboratory of Ultrafast Laser Spectroscopy, Zhongshan University, Guangzhou, 510275, People''s Republic of China;1. National Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin 150001, China;2. School of Mathematics and Physics, Anhui University of Technology, Maanshan 243032, China;3. The Key Laboratory of Photonic Devices and Materials, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China;1. State Key Laboratory of Crystal Materials, Institute of Crystal Materials, Shandong University, Jinan 250100, China;2. School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China;1. Department of Chemistry, Shah Jalal University of Science and Technology, Sylhet, Bangladesh;2. Department of Arts and Science, Osaka Kyoiku University, Kashiwara, Osaka, Japan;1. Department of Applied Physics, East China Jiaotong University, Nanchang 330013, PR China;2. Key Laboratory of Optoelectronic Materials Chemistry and Physics of CAS, Fujian Institute of Research on the Structure of Matter, Chinese Academic of Sciences, Fuzhou City, Fujian Province 350002, PR China;1. College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo, Henan Province, 454000, China;2. Henan Key Laboratory of Coal Green Conversion, Henan Polytechnic University, Jiaozuo, Henan Province, 454000, China |
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| Abstract: | MgSO4:Dy, MgSO4:Tm and MgSO4:Dy,Mn thermoluminescence (TL) phosphors have been prepared and their emission spectra were measured using a linear heater and optical multichannel analyzer. Emission bands at about 480, 580 and 660 nm of MgSO4 doped with Dy were observed in three dimension (3D) glow curve. Emission bands about 360, 460, and 660 nm were observed in a 3D glow curve of MgSO4 doped with Tm. The emission spectra of MgSO4:Dy and MgSO4:Tm are attributed to the characteristic emission wavelengths from transitions of Dy3+ and Tm3+ respectively. The results show that the structures of traps in matrix materials determine the activation energy distribution and dopant energy levels of rare earth ions are related with the emission spectrum wavelengths of sulfate phosphors. The intensities of the glow peaks in both bands at about 480 and 580 nm in MgSO4 doped Dy and Mn were dramatically reduced in comparison with that of MgSO4 doped Dy except above 300°C. It means that the trapping structures of MgSO4 :Dy phosphor has greatly been altered by the co-dopant Mn but no change is observed in wavelengths of the emission spectra. |
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