Sciences & technologie. A, sciences exactes
Volume 0, Numéro 23, Pages 11-16
2005-06-30
Photoconductivity Of Undoped Zno Thin Films Deposited By Spray Pyrolysis
Authors : Benouis C.e . Sanchez Juarez A . Aida M.s . Hamzaoui S . Benhaliliba M .
Abstract
The photoconductivity of ZnO thin films prepared by spray pyrolysis of the zinc dihydrated were studied. The electrical, optical behaviors and structural spectra show an important effect of substrate temperature Ts and deposition time td. Under illumination, the conductivity of asgrown sample increased due to desorption of oxygen. A small photoconductivity is representative of the electrical behavior of a quasi intrinsic material. By following cessation of illumination, we remarked a saturation of decay photoconductivity, this can be attributed to traps which captures carriers.
Keywords
Photoconductivity, ZnO thin films, spray pyrolysis, deposition time, substrate temperature, relaxation time, Laplace transform method.
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