  $\beta-Ga_2O_3$ has drawn significant attention for power electronics and
deep ultraviolet (UV) photodetectors owing to its wide bandgap of ~ 4.4 - 4.9
eV and high electric breakdown strength ~7-8 MV/cm. Growth of $\beta-Ga_2O_3$
epitaxial thin films with high growth rate has been recently reported using low
pressure chemical vapor deposition (LPCVD) technique. In this work, we have
investigated the effect of growth temperature on $\beta-Ga_2O_3$ films grown on
c-plane sapphire substrates using LPCVD. We performed growths by varying
temperatures from 800$^{\deg}$C to 950$^{\deg}$C while keeping all other growth
parameters (Ar/O$_2$ gas flow rates, growth pressure, and Gallium precursor to
substrate distance) constant. Optical, structural, and surface
characterizations are performed to determine the bandgap, phase purity, crystal
orientation, and crystalline quality of the grown thin films. Amorphous islands
of $Ga_2O_3$ are observed at growth temperature of 800$^{\deg}$C while
continuous and crystalline (-201) oriented $\beta-Ga_2O_3$ thin films are
achieved for growth temperatures of 850$^{\deg}$C to 950$^{\deg}$C.
Crystallinity of the films is found to improve with increase in growth
temperature with a minimum rocking full width at half maximum of 1.52$^{\deg}$
in sample grown at 925$^{\deg}$C. For all the samples grown at and above
875$^{\deg}$C, transmittance measurements revealed an optical bandgap of
~4.77-4.80 eV with high growth rate of ~6 ${\mu}$m/hr.
