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SM ISO690:2012 RACU, Andrei, PASCARIU, Mihai Cosmin, SEBARCHIEVICI, I., SZABADAI, Zoltan, MICU, Alexandru, KULIKOVA, Olga, STEF, Marius. Comparative study of luminescence concentration quenching of 4S3/2 state in Y2-xErxO3 and Y3-xErxGa5O12. In: Materials Science and Condensed Matter Physics, Ed. 8-th Edition, 12-16 septembrie 2016, Chişinău. Chişinău: Institutul de Fizică Aplicată, 2016, Editia 8, p. 242. ISBN 978-9975-9787-1-2. |
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Materials Science and Condensed Matter Physics Editia 8, 2016 |
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Conferința "International Conference on Materials Science and Condensed Matter Physics" 8-th Edition, Chişinău, Moldova, 12-16 septembrie 2016 | |
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Pag. 242-242 | |
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This work is an contribution to development of luminescent materials doped with lanthanide ions and is focused to understand the influence of dopant concentrations on optical properties. The proper control of dopant concentrations may influence the quality and evolution of optical devices like ceramic laser active media, optical fiber amplifiers, fluorescence bioimaging agents, luminescent solar concentrators, etc. [1, 2]. Erbium doped materials start to be interesting due to the near-infrared light emission at 1550 nm - wavelength specific for fiber optics communications. Such emission pumped with 980 nm laser diode, leads also to up-converted green visible (VIS) light emission from 4S3/2 energy state [3, 4]. Pumping with ultraviolet (UV) radiation the 4G9/2, 4G11/2 erbium energy states leads to promising, less studied VIS green light emission. In this context comparative study of optical properties and dopant concentrations of Y2-xErxO3 and Y3-xErxGa5O12 nanocrystalline solid solutions, was performed. The work aim was registration of photoluminescence decays from 4S3/2 erbium energy state and their exponential fitting for correlate it with concentrations of erbium dopant material Obtained results will contribute to identification of optimal Er3+ concentration corelared with efficient light emission for further Yb3+ co-doping (Fig. 1). Steady state / time-resolved photoluminescence measurements was done using FLS 980, Edinburgh Instruments Spectrometer. Concentration determinations was done using EDAX and MPAES techniques on FEI Inspect S Microscope and Agilent spectrometers respectively |
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