Cubic PbS thin films on TCO glass substrate by galvanic technique |
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| Affiliation: | 1. Department of Physics, Faculty of Arts and Sciences, Mustafa Kemal University, 31034 Hatay, Turkey;2. Department of Chemistry, Faculty of Arts and Sciences, Mustafa Kemal University, 31034 Hatay, Turkey;1. Department of Electrical Engineering, Bushehr Branch, Islamic Azad University (I.A.U), Bushehr, Iran;2. Department of Physics, Masjed-Soleiman Branch, Islamic Azad University (I.A.U), Masjed-Soleiman, Iran;3. Department of Physics, Ahwaz Branch, Islamic Azad University, Ahwaz, Iran;4. Department of Chemistry, Shahid Sherafat, University of Farhangian, 15916 Tehran, Iran;5. Low Dimensional Materials Research Center, Department of Physics, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia;1. Benemérita Universidad Autonoma de Puebla. CIDS, Av. San Claudio y 18 Sur, Col. San Manuel, Ciudad Universitaria, CP 72570, P.O. Box 1067, Puebla, Pue., 7200, Mexico;2. Instituto de Energías Renovables, Universidad Nacional Autónoma de México, 62580 Temixco, Morelos, Mexico;3. Benemérita Universidad Autónoma de Puebla Lab. de Ciencias de Materiales de la Facultad de Ciencias Químicas, P.O. Box 1067, Puebla, Pué., 72001 Mexico |
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| Abstract: | We report an electrochemical deposition of PbS thin films on SnO2:F coated Transparent Conducting Oxide (TCO) glass substrates from a solution of EDTA, Pb(OAc)2 and Na2S2O3. A Pb strip acted as a sacrificial anode, while the TCO glass was the cathode. No external bias was applied. The deposition of PbS thin films was pH sensitive and a pH around 3 was found to be optimum for film deposition. The deposition was carried out at 80 °C, with stirring of the solution. X-ray diffraction studies revealed that the PbS films were of cubic phase. Scanning electron microscope image analysis showed a highly compact surface morphology. IR spectrum yielded an energy band gap around 0.4 eV. A.C. current–voltage (I–V) measurements were carried out using gold as one of the contacts. It was found that the PbS film formed an ohmic contact when the other electrode was also gold, however, a Schottky junction resulted, when the second contact was TCO. |
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