In an attempt to design and fabricate a suitable II–VI group material of variable optical gap, we have synthesized a series of ZnxCo1−xS (0 ≤ x ≤ 0.4) thin films via a facile chemical solution growth technique. To gain insight of the materials properties we have opted for different characterization techniques and are reporting our observations pertaining to the elemental analysis, magneto-topography, optical and electrical transport studies. Excellent agreement of binding energy values for Co2p, Zn2p and S2p levels in elemental analysis concluded the oxidation states as Co2+, Zn2+ and S2−. Magnetic force microscopy confirmed the existence of randomly distributed magnetic domains mimicking the surface topography. The optical studies determined the high absorption coefficient (α ≈ 104 to 105 cm−1) in the as-grown thin films. The optical band gap is found to be increased non-linearly from 1.59 to 2.50 eV as the composition parameter (x) is increased. The D.C. electrical conductivity measurements showed decrease in conductivity with increased composition parameter (x). The thermoelectric studies confirmed degenerative nature of the as-deposited thin films with n-type conduction.
This is a preview of subscription content, access via your institution.
Buy single article
Instant access to the full article PDF.
Tax calculation will be finalised during checkout.
Subscribe to journal
Immediate online access to all issues from 2019. Subscription will auto renew annually.
Tax calculation will be finalised during checkout.
K.V. Khot, S.S. Mali, V.B. Ghanwat, S.D. Kharade, R.M. Mane, C.K. Hong, P.N. Bhosale, Photocurrent enhancement in Cu2Cd(SSe)2 photoanode synthesized via arrested precipitation route. New J. Chem. (2016). doi:10.1039/C5NJ03046C
C.S. Bagade, V.B. Ghanwat, K.V. Khot, P.N. Bhosale, Efficient improvement of photoelectrochemical performance of CdSe thin film deposited via arrested precipitation technique. Mater. Lett. 164, 52–55 (2016)
T.D. Dongale, K.V. Khot, S.S. Mali, P.S. Patil, P.K. Gaikwad, R.K. Kamat, P.N. Bhosale, Development of Ag/ZnO/FTO thin film memristor using aqueous chemical route. Mater. Sci. Semicond. Process. 40, 523–526 (2015)
N.D. Desai, V.B. Ghanwat, K.V. Khot, S.S. Mali, C.K. Hong, P.N. Bhosale, Effect of substrate on the nanostructured Bi2Se3 thin films for solar cell applications. J. Mater. Sci. Mater. Electron. 26, 6897–6906 (2015). doi:10.1007/s10854-015-3307-6
S.T. Mane, P.C. Pingale, S.A. Lendave, V.S. Karande, L.P. Deshmukh, M. Sharon, Electrochemical photovoltaic studies of Cd1−xCoxS thin film electrodes deposited by a liquid phase chemical deposition. Electrochim. Acta 102, 113–119 (2013)
S.T. Mane, S.S. Kamble, L.P. Deshmukh, Cobalt sulphide thin films: chemical bath deposition, growth and properties. Mater. Lett. 65, 2639–2641 (2011)
S.S. Kamble, A. Sikora, S.T. Pawar, R.C. Kambale, N.N. Maldar, L.P. Deshmukh, Morphology reliance of cobalt sulfide thin films: a chemo-thermo-mechanical perception. J. Alloys Compd. 631, 303–314 (2015)
S.S. Kamble, A. Sikora, S.T. Pawar, N.N. Maldar, L.P. Deshmukh, Cobalt sulfide thin films: chemical growth, reaction kinetics and microstructural analysis. J. Alloys Compd. 623, 466–472 (2015)
S.S. Kamble, D.P. Dubal, N.L. Tarwal, A. Sikora, J.H. Jang, L.P. Deshmukh, Studies on the ZnxCo1−xS thin films: a facile synthesis process and characteristic properties. J. Alloys Compd. 656, 590–597 (2016)
S.S. Kamble, Ph.D. Thesis (Solapur University, Solapur, M.S., India, 2015)
A.A. Khassin, T.M. Yurieva, V.V. Kaichev, V.I. Bukhtiyarov, A.A. Budneva, E.A. Paukshtis, V.N. Parmon, Metal–support interactions in cobalt-aluminum co-precipitated catalysts: XPS and CO adsorption studies. J. Mol. Catal. A Chem. 175, 189–204 (2001)
Z.W. Zhao, B.K. Tay, J.S. Chen, J.F. Hu, B.C. Lim, G.P. Li, Large magnetic moment observed in Co-doped ZnO nanocluster-assembled thin films at room temperature. Appl. Phys. Lett. 90, 152 (2007)
J.F. Moulder, W.F. Stickle, P.E. Sobol, K.D. Bomden, J. Chastain (eds.), Handbook of X-Ray Photoelectron Spectroscopy (Perkin-Elmer, Eden Prairie, Minnesota, 1992)
G.A. Garson, M.H. Nassir, M.A. Langell, Epitaxial growth of Co3O4 on CoO(100). J. Vac. Sci. Technol. A 14, 1637–1642 (1996)
S.N. Towle, J.R. Bargar, G.E. Brown Jr., G.A. Parks, Surface precipitation of Co(II)(aq) on Al2O3. J. Colloid Interface Sci. 187, 62–82 (1992)
A.C. Tuan, J.D. Bryan, A.B. Pakhomov, V. Shutthanandan, S. Thevuthasan, D.E. McCready, D. Gaspar, M.H. Engelhard, J.W. Rogers Jr., K. Krishnan, D.R. Gamelin, S.A. Chambers, Epitaxial growth and properties of cobalt-doped ZnO on α-Al2O3 single-crystal substrates. Phys. Rev. B 70, 054424 (2004)
A.N. Chattarki, N.N. Maldar, L.P. Deshmukh, Synthesis, structure and spectro-microscopic studies of polycrystalline HgxPb1−xS thin films grown by a chemical routeJ. Alloys Compd. 597, 223–229 (2014)
P. Sharma, S.C. Katyal, Determination of optical parameters of a-(As2Se3)90Ge10 thin film. J. Phys. D Appl. Phys. 40, 2115 (2007)
D.S. Sutrave, G.S. Shahane, V.B. Patil, L.P. Deshmukh, Micro-crystallographic and optical studies on Cd1−xZnxSe thin films. Mater. Chem. Phys. 65, 298–305 (2000)
M.D. Uplane, S.H. Pawar, Studies on photoelectrochemical cells formed with Cd1−xZnxS films prepared at various substrate temperatures. Solar Cells 10, 177–187 (1983)
About this article
Cite this article
Kamble, S.S., Sikora, A., Deshmukh, S.L. et al. The optical and electrical transport studies of ZnxCo1−xS thin films. J Mater Sci: Mater Electron 27, 12302–12311 (2016). https://doi.org/10.1007/s10854-016-5064-6
- Thermoelectric Power
- Magnetic Force Microscopy
- Composition Parameter
- Polycrystalline Thin Film
- Magnetic Force Microscopy Image