Effect of pH Value and Electrolyte Concentration on the Copper Sulphide Thin Films Prepared by Chemical Bath Deposition Method

Year 2010, Volume: 23 Issue: 4, 435 - 443, 25.03.2010

Anuar Kassim , Saravanan Nagalıngam Tan Tee Khor Koon Ho Mın

Abstract

Thin films of copper sulphide were deposited using  chemical bath deposition method. The deposition was carried out at various pH values and electrolyte concentrations. The structure, morphology and optical properties of thin films were investigated by means  of X-ray diffraction, atomic force microscopy and UV-Visible spectrophotometer. X-ray diffraction patterns confirmed that the  deposited materials were CuS with hexagonal phase. The films deposited using 0.05 M of copper chloride and sodium thiosulfate solutions at pH 3 showed the best crystallinity, uniform surface coverage and high absorption characteristics. The band gap was found to be 2.6 eV with p-type behaviour.

 

Key Words: Copper sulphide, Chemical bath deposition, thin films, X-ray diffraction.

 

Keywords

Copper sulphide, Chemical bath deposition, thin films, X-ray diffraction

References

• Nascu, C., Pop, I., Ionescu, V., Indrea, E., Bratu, I., “Spray pyrolysis deposition of CuS thin films”, Mater. Lett., 32: 73-77 (1997).
• Zhuge, F.W., Li, X.M., Gao, X.D., Gan, X.Y., Zhou, F.L., “Synthesis of stable amorphous Cu2S thin film by successive ion layer adsorption and reaction method”, Mater. Lett., 63: 652-654 (2009).
• Podder, J., Kobayashi, R., Ichimura, M., “Photochemical deposition of CuxS thin films from aqueous solutions”, Thin Solid Films, 472: 71-75 (2005).
• Anuar, K., Zainal, Z., Hussein, M.Z., Saravanan, N., Haslina, I., “Cathodic electrodeposition of Cu2S thin film for solar energy conversion”, Sol. Energy Mater. Sol. Cells, 73: 351-365 (2002). GU J Sci., 23(4):435-443 (2010)/Anuar KASSIM1♠, Saravanan NAGALINGAM2, Tan Wee TEE1, Khor Lea KOON1 443
• Gadave, K.M., Lokhande, C.D., “Formation of CuxS films through a chemical bath deposition process”, Thin Solid Films, 229: 1-4 (1993).
• Goudarzi, A., Aval, G.M., Sahraei, R., Ahmadpoor, H., “Ammonia-free chemical bath deposition of nanocrystalline ZnS thin film buffer layer for solar cells”, Thin Solid Films, 516: 4953-4957 (2008).
• Karimi, M., Rabiee, M., Moztarzadeh, F., Tahriri, M., Bodaghi, M., “Controlled synthesis, characterization and optical properties of CdS nanocrystalline thin films via chemical bath deposition (CBD) route”, Curr. Appl Phys., 9: 1263- 1268 (2009).
• Krishnan, B., Arato, A., Cardenas, E., Roy, T.K.D., Castillo, G.A., “On the structure, morphology and optical properties of chemical bath deposited Sb2S3 thin films”, Appl. Surf. Sci., 254: 3200-3206 (2008).
• Mnari, M., Kamoun, N., Bonnet, J., Dachraoui, M., “Chemical bath deposition of tin sulphide thin films in acid solution”, Comptes Rendus Chimie, 12: 824- 827 (2009).
• Song, W.C., Lee, J.H., “Growth and characterization of ZnxCd1-xS films prepared by using chemical bath deposition for photovoltaic devices”, J. Korean Phys. Soc., 54: 1660-1665 (2009).
• Anuar, K., Tan, W.T., Atan, M.S., Dzulkefly, K.A., Jelas, M.H., Ho, S.M. and Saravanan, N., “Preparation and characterization of chemically deposited Cu4SnS4 thin films”, J. Ultra Chem., 5: 21-26 (2009).
• Esparza-Ponce, H.E., Hernandez-Borja, J., Reyes- Rojas, A., Cervantes-Sanchez, M., Vorobjev, Y.V., Ramirez-Bon, R., Perez-Robles, J.F., “Growth technology, X-ray and optical properties of CdSe thin films”, Mater. Chem. Phys., 113: 824-828 (2009).
• Bari, R.H., Ganesan, V., Potadar, S., Patil, L.A., “Structural, optical and electrical properties of chemically deposited copper selenide films”, Bull. Mater. Sci., 32: 37-42 (2009).
• Hankare, P.P., Chate, P.A., Sathe, D.J., Chavan, P.A., Bhuse, V.M., “Effect of thermal annealing on properties of zinc selenide thin films deposited by chemical bath deposition”, J. Mater. Sci -Mater. Electron., 20: 374-379 (2009).
• Chaudhari, J.B., Deshpande, N.G., Gudage, Y.G., Ghosh, A., Huse, V.B., Sharma, R., “Studies on growth and characterization of ternary CdS1-xSex alloy thin films deposited by chemical bath deposition technique”, Appl. Surf. Sci., 254: 6810- 6816 (2008).
• Bhardwaj, A., Varadarajan, E., Srivastava, P. and Sehgal, H.K., “Structural, optical and electrical properties of chemically grown Pb1-xFexSe nanoparticle thin films”, Solid State Commun., 146: 53-56 (2008).
• Takeuchi, Y., Kudoh, Y., Sato, G., “The crystal structure of covellite CuS under high pressure up to 33 kbar”, Z. Kristallogr., 173: 119-128 (1985).
• Lindroos, S., Arnold, A., Leskela, M., “Growth of CuS thin films by the successive ionic layer adsorption and reaction method”, Appl. Surf. Sci., 158: 75-80 (2000).
• He, Y.B., Polity, A., Osterreicher, I., Pfisterer, D., Gregor, R., Meyer, B.K., Hardt, M., “Hall effect and surface characterization of Cu2S and CuS films deposited by RF reactive sputtering”, Physica B, 308-310: 1069-1073 (2001).
• Isac, L.A., Duta, A., Kriza, A., Enesca, I.A., Nanu, M., “The growth of CuS thin films by spray pyrolysis”, J. Phys.: Conf. Ser., 61: 477-481 (2007).
• Nadaud, N., Lequeux, N., Nanot, M., Jove, J., Roisnel, T., “Structural studies of tin-doped indium oxide (ITO) and In4Sn3O12”, J. Solid State Chem., 135: 140-148 (1998).
• Stern, F., “Elementary theory of the optical
• properties of solids”, Solid State Phys., 15: 299-408 (1963).
• Sartale, S.D., Lokhande, C.D., “Growth of copper sulphide thin films by successive ionic layer adsorption and reaction (SILAR) method”, Mater. Chem. Phys., 65: 63-67 (2000).
• Ali Yildirim, M., Ates, A., Astam, A., “ Annealing and light effect on structural, optical and electrical properties of CuS, CuZnS and ZnS thin films grown by the SILAR method”, Physica E, 41: 1365-1372 (2009).
• Fonash, S.J., Solar Cell Device Physics, Academic Press, Sydney, (1981).
• Grozdanov, I., Najdoski, M., “Optical and electrical properties of copper sulfide films of variable composition”, J. Solid State Chem., 114: 469-475 (1995).
• Johansson, J., Kostamo, J., Karppinen, M., Niinisto, L., “Growth of conductive copper sulfide thin films by atomic layer deposition”, J. Mater. Chem., 12: 1022-1026 (2002).
• De Tacconi, N.R., Rajeshwar, K., Lezna, R.O., “Study of copper sulfide film formation by voltammetry combined with electrochemical quartz crystal microgravimetry/coulometry and optical spectroscopy,” J. Phys. Chem., 100: 18234-18239 (1996).