A novel green emitting phosphor Ca2GeO4:Tb3+ |
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| Affiliation: | 1. School of Physics and Optoelectronic Engineering, Guangdong University of Technology, Guangzhou 510006, China;2. State Key Laboratory of Luminescent Materials and Devices, School of Materials Science and Technology, South China University of Technology, Guangzhou 510640, China;3. Guangzhou Maritime Institute, Guangzhou 510330, China;1. Anhui Key Laboratory of Optoelectronic Materials Science and Technology, Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Normal University, Wuhu, Anhui 241000, China;2. School of Physics and Electrical Engineering, Anqing Normal University, Anqing, Anhui, 246133, China;1. College of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, PR China;2. Shandong Provincial Key Laboratory of Soil Conservation and Environmental Protection, College of Resources and Environment, Linyi University, Linyi 276000, China;3. School of Physics and Opto-Electronic Technology, Baoji University of Arts and Sciences, Baoji 721016, Shaanxi, PR China;4. Department of Chemical Engineer, New Mexico State University, Las Cruces, NM 88003, United States |
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| Abstract: | A novel green emitting phosphor, Tb3+-doped Ca2GeO4 was prepared for the first time by a solid-state reaction. The phosphor showed prominent luminescence in green due to the magnetic dipole transition of 5D4 → 7F5. Structural characterization of the luminescent material was carried out with X-ray powder diffraction (XRD) analysis and field emission scanning electron microscopy (FE-SEM). Luminescence properties were analyzed by measuring the excitation and photoluminescence spectra. Photoluminescence measurements indicated that the phosphor exhibited bright green emission at about 541 and 550 nm under UV excitation. In addition, Al3+ or Li+ co-doping enhances the green emission from Ca2GeO4:Tb3+ by about 18 and 4 times, respectively, under UV excitation. The excellent luminescence properties make it a possible candidate for flat panel display application. |
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