Journal
JOURNAL OF NON-CRYSTALLINE SOLIDS
Volume 354, Issue 45-46, Pages 4944-4947Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jnoncrysol.2008.07.009
Keywords
Conductivity; Variable-range hopping (VRH); TiO(2)
Funding
- Romanian Ministry of Education and Research [A 17/2008]
- Romanian Academy [GAR 34/2008]
- TUBITAK
- ANCS [TBAG-U/220 (107T584)]
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The electrical properties of n-type titanium dioxide thin films deposited by magnetron-sputtering method have been investigated by temperature-dependent conductivity. We observed that the temperature dependence of the electrical conductivity of titanium dioxide films exhibits a crossover from T(-1/4) to T(-1/2) dependence in the temperature range between 80 and 110 K. Characteristic parameters describing conductivity, such as the characteristic temperature (T(0)). hopping distance (R(hop)), average hopping energy (Delta(hop)), Coulomb gap (Delta(C)), localization length (xi) and density of states (N(E(F))), were determined, and their values were discussed within the models describing conductivity in TiO(2) thin films. (C) 2008 Elsevier B.V. All rights reserved.
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