Structural and luminescence study of Ce3+ and Tb3+ doped Ca3Sc2Si3O12 garnets obtained by freeze-drying synthesis method |
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| Affiliation: | 1. Departamento de Física, Universidad de La Laguna, 38206 La Laguna, Tenerife, Spain;2. Departamento de Química, U.D. Química Inorgánica, Universidad de La Laguna, 38206 La Laguna, Tenerife, Spain;3. Institute of Materials and Nanotechnology, Universidad de La Laguna, 38206 La Laguna, Tenerife, Spain;4. Institute of Low Temperature and Structure Research PAS, 50-422 Wroclaw, Poland;5. IFN–CNR CSMFO Lab. and FBK Photonics Unit, I-38123 Trento, Italy;1. Institute of Automation and Control Processes FEB RAS, 5 Radio St., Vladivostok 690041, Russia;2. Far Eastern Federal University, 8 Sukhanova Str., Vladivostok 690041, Russia;1. Department of Chemistry, University of Arkansas at Little Rock, 2801 South University Avenue, Little Rock, AR 72204, USA;2. Center for Integrative Nanotechnology Sciences, University of Arkansas at Little Rock, 2801 South University Avenue, Little Rock, AR 72204, USA;1. Center for Crystal Research and Development, Key Laboratory of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China;2. University of Chinese Academy of Sciences, Beijing 100049, PR China;3. State Key Laboratory of Crystal Materials and Institute of Crystal Materials, Shandong University, Jinan 250100, PR China |
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| Abstract: | Ca3Sc2Si3O12 garnets doped with Ce3+ and Tb3+ ions were synthesized by a freeze-drying precursor method. The structural characterization was performed by X-ray diffraction (XRD) and Raman spectroscopy. Scanning Electron Microscopy (SEM) images of the calcined material were studied. High temperature treatments and doping with RE3+ ions resulted in a reduction of the secondary phases (Sc2O3) and an increase of the mean size of the nanocrystals, from 75 to 149 nm. These effects were confirmed by means of Raman spectra. Moreover, luminescence features of Ce3+ and Tb3+ doped samples indicated that these ions are effectively incorporated into the crystalline phase. In addition, the energy transfer processes between Ce3+ and Tb3+ ions in codoped garnets have been studied. |
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| Keywords: | Freeze-drying method Energy transfer |
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