Abstract
In the present article, optical properties and energy upconversion in
Er3+/Yb3+ co-doped BiNbO4 matrix were investigated. The BiNbO4 matrix
was prepared using the solid-state reaction method. X-ray diffraction of
the matrix shows that the crystal structure is consistent with ICSD code
74338. The grain distribution and the behavior of doping with Er3+ and
Yb3+ on the sample surface were obtained by scanning electron
microscope. Raman spectral characterization was carried out to examine
the behavior of the vibrational modes of the samples. Upconversion
emissions in the visible region at 484.5, 522, 541.5 and 670.5 nm in the
matrices BiNbO4:Er,Yb and BiNbO4:Er were observed and analyzed as a
function of 980 nm laser excitation power and rare-earth doping
concentration. The results show that BiNbO4 is a promising host material
for efficient upconversion phosphors. (c) 2016 Elsevier Ltd and Techna
Group S.r.l. All rights reserved.
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