title: Hydrothermal synthesis and structural and spectroscopic properties of the new triclinic form of GdBO3:Eu3+ nanocrystals.
abstract: Triclinic Gd1-xEuxBO3 nanophosphors have been prepared by a hydrothermal method without using additional coreagents and prior precipitation of precursor (in situ). The formation of the borate nanorods and their crystal structure was refined on the basis of X-ray diffraction patterns (XRD) and well confirmed using various techniques such as infrared spectroscopy (IR), Raman spectroscopy, transmission electron microscopy (TEM), and energy-dispersive X-ray spectroscopy (EDX). The new triclinic crystal structure (space group P1) for the GdBO3 nanocrystals and detailed structure parameters were determined with the help of the Rietveld analysis. The spectroscopic characteristics of the synthesized nanomaterials with different concentrations of Eu(3+) ions were defined with the use of luminescence excitation spectra as well as emission spectra and decay kinetics. The Judd-Ofelt parameters (Ω2, Ω4) and quantum efficiency, η, were also calculated for the more detailed analysis of Eu(3+) spectra in the GdBO3 host.
authors.affiliation: Institute of Molecular Physics, Polish Academy of Sciences, Mariana Smoluchowskiego 17, 60-179 Poznań, Poland.
authors.forename: Agata
authors.initials: A
authors.lastname: Szczeszak
authors.forename: Tomasz
authors.initials: T
authors.lastname: Grzyb
authors.forename: Bolesław
authors.initials: B
authors.lastname: Barszcz
authors.forename: Vitali
authors.initials: V
authors.lastname: Nagirnyi
authors.forename: Aleksei
authors.initials: A
authors.lastname: Kotlov
authors.forename: Stefan
authors.initials: S
authors.lastname: Lis