Abstract
The Y
$_{2}$
O
$_{3}$
phosphors doped/codoped with Sm
$^{3+}$
/Sm
$^{3+}$
–Yb
$^{3+}$
ions at different concentrations have been prepared using combustion technique.
The prepared phosphors are characterized by X-ray diffraction (XRD), Scanning electron microscopy
(SEM) and Fourier transform infrared (FTIR) spectroscopy. The average crystallite size of the
phosphors calculated based on the XRD is observed to increase with annealing. The FTIR analysis
suggested that the impurity is reduced on annealing the sample. NIR to visible frequency
upconversion emission has been observed from synthesized phosphors upon a 980 nm diode laser
excitation. The concentration dependence study shows a tuning in light color emitted from samples.
The upconversion mechanism involved in the Sm
$^{3+}$
/Sm
$^{3+}$
–Yb
$^{3+}$
doped/codoped Y
$_{2}$
O
$_{3}$
phosphors has been explained on the basis of excited state absorption (ESA) and
energy transfer (ET) process.
© 2013 IEEE
PDF Article
More Like This
Cited By
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Login to access Optica Member Subscription