Eu3+ concentration effect on luminescence properties of YAG:Eu3+ nanoparticles |
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| Affiliation: | 1. Saint Petersburg State University, Saint Petersburg, Russia;2. Scientific and Technological Institute of Optical Material Science, Saint Petersburg, Russia;1. Laboratoire de Physico-chimie des Matériaux Minéraux et leurs Applications, Centre National des Recherches en Sciences des Matériaux, Technopole de Borj Cedria, BP 73, 8027 Soliman, Tunisia;2. Département de Physique, Faculté des Sciences de Tunis, Campus ElManar, 2092 Tunis, Tunisia;1. Institute of Physics of NAS of Belarus, Minsk, Belarus;2. Institute of Physics of NAS of Azerbaijan, Baku, Azerbaijan;3. M.V. Lomonosov department of MSU in Baku, Baku, Azerbaijan;1. Department of Energy Science, Sungkyunkwan University, Suwon 440-746, Republic of Korea;2. School of Chemical & Biological Engineering, Seoul National University, Seoul 151-744, Republic of Korea;3. Department of Materials Science and Engineering, Seoul National University, Seoul 151-742, Republic of Korea;4. Department of Materials Science and Engineering & Energy Systems Research, Ajou University, Suwon 443-749, Republic of Korea;5. Nano-Mechanical Systems Research Division, Korea Institute of Machinery and Materials (KIMM), Daejeon 305-343, Republic of Korea;6. School of Materials Science and Engineering, Kyungpook National University, Daegu 41566, Republic of Korea;7. School of Advanced Materials Science & Engineering, Sungkyunkwan University, Suwon 440-746, Republic of Korea |
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| Abstract: | Nanocrystalline Eu3+-doped YAG powders were prepared by modified Pechini method. The structural properties were investigated with XRD, SEM and Raman spectroscopy. XRD pattern indicated that the phase-pure YAG:Eu3+ crystallites were obtained without the formation of any other phases. Raman spectrum revealed good homogeneity and crystallinity of synthesized nanopowders. The luminescent properties were studied by measurement of excitation and emission spectra, quantum yields and decay curves. The effect of Eu3+ concentration on 5D0 level lifetime was studied. The processes resulting in the relaxation of excited state (5D0 level) were discussed and the probabilities of radiative and nonradiative processes were calculated using the model of f–f transition intensities. It was found that the observed shortening of 5D0 level lifetime with Eu concentration is caused by increase of nonradiative process probability. |
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| Keywords: | YAG Nanocrystalline powder Luminescence Lifetime |
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