Optical characteristics and charge transfer band excitation of Dy3+ doped Y2O3 phosphor |
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| Authors: | K Mishra SK Singh AK Singh SB Rai |
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| Affiliation: | 1. Laser and Spectroscopy Laboratory, Department of Physics, Banaras Hindu University, Varanasi 221005, India;2. School of Materials Science and Technology, Institute of Technology, Banaras Hindu University, Varanasi 221005, India;1. Faculty of Chemistry, University of Wroclaw, 14. F. Joliot-Curie Street, 50-383 Wroclaw, Poland;2. Wroclaw Research Centre EIT+, 147/149 Stablowicka Street, 54-066 Wroclaw, Poland;3. Institute of Low Temperature and Structure Research, Polish Academy of Sciences, 2 Okólna Street, 50-422 Wroclaw, Poland;1. National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, Chinese Academy of Engineering Physics, Mianyang 621900, China;2. College of Physical Science and Technology, Sichuan University, Chengdu 610065, China;3. Key Laboratory of High Energy Density Physics and Technology of Ministry of Education, Sichuan University, Chengdu 610065, China;4. Academy for Advanced Interdisciplinary Studies, Southern University of Science and Technology, Shenzhen 518055, China |
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| Abstract: | Dy3+ ion-doped Y2O3 phosphors have been synthesized and characterized for structure and optical properties. Structural characterization reveals that the samples are well crystalline. The crystallinity and particle size increases as the sample is post annealed, while optical quenching entities are reduced due to which a significant enhancement in fluorescence is observed. The phosphor is efficiently excited by ultraviolet light and emits intense blue (486 nm), yellow (573 nm), red (666 nm), and near infrared (764 nm, 823 nm) light. The emission is also observed even if charge transfer band (CTB) is excited, via energy transfer from CTB to 4f levels of Dy3+ ion. The intensity of yellow transition band varies with a variation in concentration of Dy3+ ion as well as with excitation wavelength, while the intensity of other transitions remains unaffected. Thus a variation in yellow to blue color (Y/B) gives an opportunity for the development of color tunable phosphor. |
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