Effect of processing parameters on structural, morphological and optical Y2O3:Yb3+/Ho3+ powders characteristics
Marinković, Bojan A.
de Pinho Mauricio, M. H.
MetadataShow full item record
Rod-like and flake-like up-converting Y2O3:Yb3+/Ho3+ particles which are composed of nanoparticles with size less than 100 nm, are prepared by a simple hydrothermal processing at 473 K (3 h) followed by additional thermal treatment at 1373 K (3 and 12 h). The effect of precursor pH value on the formation of Y2O3:Yb3+/Ho3+ is followed through X-ray powder diffractometry (XRPD), scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). Structural refinement confirms formation of the cubic bixbyte structure (S. G. Ia-3) with the non-uniform accommodation of dopants at C-2 and S-6 cationic sites. Under 978 nm laser excitation, strong green (530-570 nm) up-conversion is observed in all samples. The emission shows a decrease in intensity with an increase in external temperature, indicating FIR (fluorescence intensity ratio) based temperature sensing behavior of 0.52% for the F-5(4) - GT I-5(8)/S-5(2) - GT I-5(8) transitions. (C) 2014 The Society of Powder Technology Japan.... Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.
Keywords:Up-convertors / Y2O3:Yb3+/Ho3+ / Hydrothermal synthesis / Thermometry / FIR
Source:Advanced Powder Technology, 2014, 25, 5, 1449-1454
- Rational design and synthesis of biologically active and coordination compounds and functional materials, relevant for (bio)nanotechnology (RS-172035)
- PRIZMA doo., Kragujevac, CNPq