Room temperature photoluminescence
(PL, F-900, Edinburg Instruments, UK) and
Raman scattering spectroscopy (Perkin Elmer Spectrum
GXNIR FT-Raman spectrophotometer) were
measured with an xenon lamp (at 325 nm) and
Nd:YAG laser (1064 nm) as the excitation sources, respectively,
to study the optical properties of the grown
samples.