Photoluminescence properties and energy transfer between activators at different crystallographic sites in Ce3+ doped Sr2MgAl22O36 |
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| Affiliation: | 1. Guangdong Provincial Engineering Technology Research Center for Optical Agricultural, College of Materials and Energy, South China Agricultural University, Guangzhou, 510642 China;2. Department of Chemical Engineering, Chung Yuan Christian University, Chungli, Republic of China;1. Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, Lanzhou 730000, China;2. Department of Materials Science, School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, China;1. Key Lab of Advanced Transducers and Intelligent Control System of Ministry of Education, College of Physics and Optoelectronics, Taiyuan University of Technology, Taiyuan 030024, China;2. Mineralogy Department, Institute for Geosciences, Friedrich-Schiller University Jena, Carl-Zeiss-Promenade 10, 07745 Jena, Germany;1. Department of Physics and Interdisciplinary Program of Biomedical, Mechanical and Electric Engineering, Pukyong National University, Busan 608737, Republic of Korea;2. College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China |
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| Abstract: | In this paper, a series of Ce3+ doped Sr2MgAl22O36 (SMA) phosphors have been prepared by high temperature solid-state reaction method. The phase structure of prepared samples was checked by the powder X-ray diffraction (XRD). The morphology of the samples was inspected using a field-emission scanning electron microscope (SEM). Under different UV radiation, this phosphor exhibits different emission bands due to the Ce3+ ions located at different lattice sites. The corresponding luminescence and energy transfer mechanisms have been proposed in detail. The phosphor exhibits different concentration quenching mechanisms because the Ce3+ ions substitute two different crystallographic sites in the host. Moreover, the temperature dependent emission properties of SMA:Ce3+ were conducted from 30 °C to 200 °C, as much as 72.96% of the room-temperature emission intensity is retained at 150 °C. The SMA:Ce3+ phosphor exhibits bright blue emission with CIE coordinates (x=0.16, y=0.12) under UV excitation. The results indicate that SMA:Ce3+ phosphor has great potential applications in UV-pumped light emitting diodes. |
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| Keywords: | Phosphors Photoluminescence Energy transfer |
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