Single red up-conversion luminescence of Er sensitized layered Y2Ti2O7 phosphor |
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| Institution: | 1. Shanghai University, Shanghai 200444, PR China;2. Key Laboratory of Transparent Opto-functional Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201899, PR China;3. The State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, PR China;1. Istanbul Technical University, Physics Engineering, Maslak, 34469, Istanbul, Turkey;2. Marmara University, Department of Physics, Kadikoy, 34722, Istanbul, Turkey;1. College of Transportation Engineering, Dalian Maritime University, Dalian 116026, China;2. Department of Physics, Dalian Maritime University, Dalian 116026, China |
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| Abstract: | High color purity red emission with single band successfully achieved in a new Er3+, Tm3+ co-doped Y2Ti2O7 system under 1550 nm excitation, value of red to green emission ratio of the samples is more than 103. Efficient up-conversion luminescence can be obtained while the 4I13/2 level of Er3+ pumped by 1500 nm directly based on the large absorption section and long luminescence lifetime, and red emission composition will greatly enhanced by co-doping with Tm3+ ions, color purity of red emission under 1550 nm excitation is much higher than that of 980 nm. The quenching concentration of Er3+ ions is up to 28 mol% in Y2Ti2O7 rely on the layer distribution of cations, which can further improve the red emission color purity. |
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| Keywords: | Er Tm co-doped 980?nm 1550?nm excitation Single red emission |
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