Browsing by Author "Eleruja, Marcus Adebola"

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    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]. ...
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    Preparation and characterization of mercury cadmium sulphide thin films
    (2010-01) Eleruja, Marcus Adebola; Olofinjana, Bolutife; Adedeji, A.V.; Akinwunmi, O.O.
    The precursor bis-(morpholinodithioato-s,s')-Cd-Hg was prepared and the thin films of mercury cadmium sulphide were deposited on sodalime glass substrate by Metallorganic Chemical Vapour Deposition (MOCVD) technique. The surface morphology was obtained using Stereoscan 430i LEICA Scanning Electron Microscope. The elemental analysis was carried out using Energy Disperse X-ray (EDX). The ratio of the elements in the prepared films obtained from the EDX was found to be Hg:Cd:S = 17.55:38.12:44.32, giving a stoichiometry of Hg x Cd (1-x) S (1-δ) , δ = 0.20. . A direct band gap of 2.36 eV was obtained from the analysis of the absorption spectrum. Electrical characterization was carried out both in the dark and normal room illumination. The dark and room illumination conductivities were found to be of the same order (10 -6 Ω -1 cm -1) and the activation energy for both conditions are 0.12 eV and 0.19 eV respectively. The conductivity type was found to be p-type using the hot probe method.
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    Preparation and characterization of MOCVD thin films of indium tin oxide
    (Optical Materials, 1999-11) Akinwunmi, O.O; Eleruja, Marcus Adebola; Olowolafe, J.O; Adegboyega, G.A
    Indium Tin Oxide (ITO) was deposited by pyrolysis of mixed metal acetylacetonate (a single solid-source precursor). This study demonstrates that the properties of the as-deposited film depend on the deposition temperature. Films with a resistivity of , a visible transmission of over 80%, and a direct optical energy gap of 3.76 eV were deposited.
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    Preparation and optical characterization of MOCVD ZnCdInS thin films
    (2000-08-04) Adedeji, A.V.; Ojo, I.A.O; Eleruja, Marcus Adebola; Djebah, A.
    The precursor, bis-(morpholinodithiocarbamate-s,s′)-Cd–Zn–In has been prepared and pyrolyzed to obtain ZnCdInS thin films. The results of the compositional studies carried out using RBS and EDXRF were found to be complementary. An optical band gap of 2.53 eV was obtained from both absorbance and PL measurements
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    Solid state physics:A coat of many colours
    (Obafemi Awolowo University Press, 2018-10-23) Eleruja, Marcus Adebola