Films deposited at 360o
C and above 360o
C caused the crystallization of the
films as mentioned by other researchers [37-39]. The films deposited at 360o
C
showed five peaks namely (110), (200), (211), (220) and (310) whereas the films
deposited at higher temperatures showed as many as eight [(110), (101), (200),
(211), (220), (310), (301), (321), (400)] peaks. Since all the peaks are sharp it is
evident that the films deposited at 360, 400, 440, 480 and 520 o
C are
polycrystalline in nature and are of cassiterite tetragonal structure. In all films the
half width of the Bragg peaks decreases and the intensity of the peaks increases
with increasing deposition temperature. Especially, the peaks (110), (200) and (211)
dominantly increased with increasing temperature [5, 13, 20, 24, 30-33, 36-43]. It
has been reported that the preferred orientation of SnO2:F film on glass substrate
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