Novel red phosphor of double perovskite compound La2MgTiO6:xEu3+ |
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| Authors: | Xin Yin Jiyong Yao Yaoming Wang Chengchun Zhao Fuqiang Huang |
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| Institution: | 1. State Key Laboratory of High Performance Ceramics and Superfine Microstructures and CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China;2. Key Laboratory of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China;3. College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, PR China |
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| Abstract: | A novel red phosphor La2MgTiO6:xEu3+ was successfully synthesized by the conventional solid state method. Excited by ultraviolet (395 nm) and blue (465 nm) light, La2MgTiO6:xEu3+ exhibits intense red emission. Due to the lack of inversion symmetry at the doping sites, the dominant emission peak is from the transition 5D0→7F2. Non-radiative transitions were demonstrated to be from dipole–dipole interactions and the critical distance was estimated to be ～9.19 Å. When Eu3+ ions' concentration reaches 15%, the emission intensity is about three times higher than that of the conventional phosphor Y2O3:Eu3+. The Commission International de L'Eclairage chromaticity coordinate was calculated to be x=0.657 and y=0.343. All the results indicate that La2MgTiO6:xEu3+ has superior luminescence properties. |
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