Browsing by Author "Adedeji, A.U"

Now showing 1 - 2 of 2
  • No Thumbnail Available
    Item
    Open Access
    Optical characterization of pyrolytically deposited ZnxCd1−xS thin films
    ( Optical Materials, 1998-09) Adedeji, A.U; Ojo, I.A.O; Djebah, A
    The precursor bis-(morpholinodithioato-s,s′)–Cd–Zn was prepared and the thin films of ZnxCd1−xS deposited on sodalime glass substrate. A direct optical energy gap of 2.63 eV was obtained from the analysis of the absorption spectrum. The photoluminescence spectrum shows shift in the energy of the primary emission peaks as a function of the excitation energy. The shift was explained as due to the quantum size effect in nanometer thick polycrystalline films. Energy Dispersive X-ray Florescence (EDXRF) confirms the elemental composition of both the precursor and the films
  • No Thumbnail Available
    Item
    Open Access
    Photoconductivity of MOCVD CdS thin films
    (Journal of Materials Science Letters, 1995-01) Eleruja, Marcus Adebola; Adedeji, A.U; Azi, samuel; Okulaja, Oluwabukola
    ... [2,3,4] Many techniques have been reported in deposition of CdS thin films. These include evaporation, sputtering, spray pyrolysis, molecular beam epitaxy (MBE) technique, photochemical deposition, successive ionic layer adsorption and reaction (SILAR) method [5][6][7][8][9][10][11][12].In all of these deposition methods there are some problems in each of them, for example , it is difficult to obtain a stiochiometric CdS films by evaporation technique and a high substrate temperature is required in spray deposition. [13] The chemical bath deposition (CBD) method appears to be a relatively simple, in expansion method to prepare a homogenous films with controlled composition [14]. ...