The electronic structure,site occupancy and luminescent properties of Ce3+-activated Li2Ca2Si2O7 blue phosphor |
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| Affiliation: | 1. Ichikawa Research Center, Sumitomo Metal Mining Co., Ltd., 3-18-5 Nakakokubun, Ichikawa, Chiba 272-8588, Japan;2. Department of Chemistry, Faculty of Science, Okayama University of Science, 1-1 Ridaicho, Kitaku, Okayama 700-0005, Japan;3. Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aobaku, Sendai 980-8577, Japan;1. College of Physics and Optoelectronics, Taiyuan University of Technology, Taiyuan, 030024, PR China;2. Department of Physics, Sri Vidya Mandir Arts and Science College, Katteri, Uthangarai, Krishnagiri 636902, Tamil Nadu, India;1. School of Materials Science and Engineering, Shanghai Institute of Technology, Shanghai 201418, PR China;2. School of Chemistry and Chemical Engineering, Shanghai Jiao Tong Unversity, 200240, PR China;3. College of Materials Science and Engineering, Donghua University, Shanghai 201620, PR China;1. Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China), Key Laboratory of Sustainable Resources Processing and Advanced Materials of Hunan Province College, Hunan Normal University, Changsha, 410081, China;2. Key Laboratory of Comprehensive Utilization of Mineral Resource in Ethnic Regions, School of Chemistry & Environment, Yunnan Minzu University, Kunming, 650500, China |
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| Abstract: | Rare earth activated lithium-containing alkaline earth silicates is an intensely studied topic in the fields of luminescent materials. In this study, a cerium-activated lithium-silicate blue phosphor, Li2Ca2Si2O7:Ce3+, was explored using structural computational simulations and systematic experiments. The Li2Ca2Si2O7:Ce3+ phosphor can be efficiently excited by near-ultraviolet and cathode ray light sources. According to the spectroscopic redshift theory, time-resolved photoluminescence (TRPL) and cathodoluminescence (CL) spectra, it is determined that the broad emission of Li2Ca2Si2O7:Ce3+ comes from two different luminescent centers. In addition, Li2Ca2Si2O7:Ce3+ exhibits strong blue emission at ~415 nm with high quantum yield and stable emission under high temperature and continuous electron beam bombardment. Therefore, this study provides a new insight into developing new high-efficiency and high-purity trichromatic phosphors. |
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| Keywords: | Phosphor Silicates Photoluminescence Cathodoluminescence |
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