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Hydrothermally-mediated preparation and photoluminescent properties of Sr3Al2O6:Eu3+ phosphor
Affiliation:1. State Key Laboratory of Optoelectronic Materials and Technologies, and School of Chemistry and Chemical Engineering, Sun Yat-Sen (Zhongshan) University, Guangzhou 510275, PR China;2. College of Chemistry Science, South China University of Technology, Guangzhou 510641, PR China;3. Department of Chemistry, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, PR China;1. State Key Laboratory of Luminescent Materials and Devices, and Institute of Optical Communication Materials, South China University of Technology, Guangzhou 510641, PR China;2. School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, PR China;1. Grup de Magnetisme, Dept. Física Fonamental, Facultat de Física, Universitat de Barcelona, Martí i Franquès 1, planta 4, edifici nou, 08028 Barcelona, Spain;3. Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China;1. Department of Applied Physics, The Hong Kong Polytechnic University, Hong Kong, China;2. The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen 518057, China
Abstract:Hydrogarnet Sr3Al2(OH)12 (SAH) has been obtained from hydrothermal systems with a wide range of pH values under mild conditions. The influence of reaction conditions on the formation of various phases has been considered. The addition of sodium hydroxide can favor the yield of pure SAH phase. Stoichiometric Sr3Al2O6 (SAO) has been prepared from SAH through thermal decomposition over 600 °C for 4 h. SAO can act as a red phosphor host with doping of Eu3+ ions. The Eu3+ ions as activators can be introduced directly under hydrothermal conditions before thermal decomposition.
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