For further investigation of the as-deposited thin films, composi-
tional characteristics were analyzed by EDS measurement. In Fig. 2 (a)
and (b), the compositional results of as-deposited CZTS thin films
were analyzed. The CZTS thin film deposited by potentiostatic method
shows nearly stoichiometric (Cu:Zn:Sn:S=24.9:16.6:10.6:47.9). In
particular, the zinc (Zn) composition was a little bit highly detected in
the deposition condition. However, the Zn-rich CZTS thin films have
reported high cell performance [21]. On the other hand, the thin film
deposited by pulsed potential electrodeposition method was com-
posed of copper and sulfate elements mainly (Cu:Zn:Sn:
S=59.42:2.59:8.55:29.44). From mentioned above results, it is
indicated that the electrodeposition methods strongly affect the
CZTS thin films characteristics.