Author:
Boiko Vitalii,Dai Zhengfa,Markowska Marta,Leonelli Cristina,Mortalò Cecilia,Armetta Francesco,Ursi Federica,Nasillo Giorgio,Saladino Maria Luisa,Hreniak Dariusz
Abstract
AbstractCo-doped Ce3+, Cr3+ and Pr3+ yttrium–aluminium–gallium garnet powders of various sizes were obtained by co-precipitation method. The microstructure and morphology were investigated by XRPD, TEM and gas porosimetry. The luminescence properties were studied by excitation and emission spectra, quantum yield and decay times. Thermoluminescence measurements were performed to evaluate the activation energy, traps redistribution and frequency factor. Limitation in the energy transfer between dopant ions in the small particles, traps depth and surface defects were considered and investigated as responsible for the quenching of persistent luminescence. The phosphors annealed at 1100 °C show the optimal persistent luminescence and nano-particle size.
Funder
Polish National Science Centre
University of Palermo
Publisher
Springer Science and Business Media LLC
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