Thermal Transformations in Nanosized MoO₃ Layers

E. P. Surovoi and N. V. Borisova

Kemerovo State University, ul. Krasnaya 6, Kemerovo, 650043 Russia

e-mail: epsur@kemsu.ru

Received October 11, 2007

Abstract—The degree of the transformation of MoO₃ films (d = 8–130 nm) increased as the duration (1–
140min) and temperature (373–573 K) of thermal treatment grew and as the film thickness decreased under
atmospheric conditions. The thermal treatment of MoO₃ films decreased the optical density at = 350 nm and
caused the appearance of an absorption maximum at = 870 nm. A mechanism of thermal transformations of
MoO₃ was suggested. The mechanism included the formation of the [(V_a)⁺⁺e] center during the preparation and
thermal treatment of MoO₃ films and thermal electron transition from the valence band to the [(V_a)⁺⁺e] center
level with the formation of the [e(V_a)⁺⁺e] center.

DOI: 10.1134/S0036024408110198

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