0000000001300642
AUTHOR
A. Mishnev
Up-conversion processes in NaLaF4:Er3+
abstract Structural and spectroscopic investigation of NaLaF 4 :Er 3+ material at different doping concentrations ispresented. X-ray diffraction patterns, up-conversion luminescence spectra and decay curves for 2 H 9/2 ? 4 I 15/2 , 4 S 3/2 ? 4 I 15/2 and 4 F 9/2 ? 4 I 15/2 optical transitions in the material are shown and possibleexcitation routes are discussed. Raman spectrum for the undoped material is presented and the effectivephonon energy of the material is estimated. Based on the obtained results application of rare-earth dopedNaLaF 4 in the field of up-conversion phosphors is evaluated. 2009 Elsevier B.V. All rights reserved. 1. IntroductionFor many years rare-earth (RE) doped materi…
Luminescence of Ce‐doped borate‐oxyfluoride glass ceramics
In the present work we studied the possibility to obtain oxyfluoride glass ceramics based on a lithium and potassium borate glasses with addition of fluorides. Lithium-borate glasses without lanthanum fluoride are transparent up to 275 nm. In samples with LaF3 doped with Ce-activator, an additional absorption at about 300 nm and intense photoluminescence could be observed. Ce-doped potassium-borate glass with addition of fluorides LaF3, LiF and GdF3 was milky and not transparent, an intense photoluminescence has been observed, X-ray diffraction measurements showed a presence of well-pronounced crystalline phases of LiF as well as of GdBO3. (© 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
Nitrogen Adsorption on Graphene Sponges Synthesized by Annealing a Mixture of Nickel and Carbon Powders
The present research has been supported by the National Research Programme for 2014–2017 “Multifunctional Materials and Composites, Photonics and Nanotechnologies”.
CCDC 981716: Experimental Crystal Structure Determination
Related Article: A. Zvirgzdins, A. Mishnev, A. Actins|2014|Acta Crystallogr.,Sect.B:Struct.Sci.,Cryst.Eng. and Mat.|70|342|doi:10.1107/S2052520614001140
CCDC 981714: Experimental Crystal Structure Determination
Related Article: A. Zvirgzdins, A. Mishnev, A. Actins|2014|Acta Crystallogr.,Sect.B:Struct.Sci.,Cryst.Eng. and Mat.|70|342|doi:10.1107/S2052520614001140
CCDC 966608: Experimental Crystal Structure Determination
Related Article: A. Zvirgzdins, M. Delina, A. Mishnev, A. Actins|2013|Acta Crystallogr.,Sect.E:Struct.Rep.Online|69|o1677|doi:10.1107/S1600536813028353
CCDC 981715: Experimental Crystal Structure Determination
Related Article: A. Zvirgzdins, A. Mishnev, A. Actins|2014|Acta Crystallogr.,Sect.B:Struct.Sci.,Cryst.Eng. and Mat.|70|342|doi:10.1107/S2052520614001140
CCDC 909915: Experimental Crystal Structure Determination
Related Article: A.Mishnev, A.Zvirgzdins, A.Actins, M.Delina|2012|Acta Crystallogr.,Sect.E:Struct.Rep.Online|68|o3136|doi:10.1107/S1600536812042432