H. Köse et al. / Electrochimica Acta 54 (2009) 1680–1686
1685
show that the morphologies of electrodeposited Bi Te
Sey films
2
3−y
are strongly affected by the deposition times.
. Conclusions
Bi Te Sey thin films have been successfully prepared by an
4
2
3−y
electrochemical co-deposition method, which based on the upd of
Bi, Te and Se from a solution of Bi(III), Te(IV) and Se(IV) in 0.1 M
HNO . The cyclic voltammetry and EDS analyses indicated that
3
the composition of the films can be controlled by using different
concentrations of SeO2 in the deposition solution. Consequently,
the best stoichiometry of Bi Te2.7Se0.3 films was obtained by a
2
co-deposition method. The films are polycrystalline and exhibit a
single phase. SEM studies indicate that the surface of the substrates
is covered by granular crystallites with the average size of 2 m.
Acknowledgments
This work was funded by the Scientific and Technological
Research Council of Turkey (TUBITAK) under project number
107T398. Its assistance is gratefully acknowledged. The authors are
grateful to Dr. Murat Alanyalıo g˘ lu for his valuable discussions and
comments.
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