2 December 1985 Photoelectrochemical Studies On Spray Pyrolysed CdS Films On SnO2 Substrates
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Abstract
Thin films of indium doped CdS have been deposited by spray pyrolysis on Sn02-coated and plain glass substrates. The films on Sn02-coated substrates showed lower sheet resistances than those deposited on plain glass substrates. Photoelectrochemical studies with annealed Sn02-coated CdS films in 1M NaOH-0.1M Na2S-0.1M S electrolyte showed an open-circuit voltage Voc = 0.51 V and short-circuit current density, Jsc= 0.82 mA.cm-2. The forward dark J-V characteristic showed Jo = 4.4 x 10-6A.cm-2 and ideality factor, n = 3.25. Mott-Schottky plots revealed a flat-band potential, Vfb = 1.7 V (SCE) and a donor density, ND = 9.68 x 1018 cm-3. The spectral response of photocurrent indicated a peak response at a wavelength of 500 nm. Intensity dependence of Voc showed a (log IL)2 dependence in conformity with Reiss theory, while Jsc varied linearly with intensity with a slope of 0.8. Surface modification with Zn2+ions resulted in enhancement of both Voc and Jsc from 0.47 V and 0.37 mA. cm-2 before modification to 0.61 V and 0.63 mA.cm-2 after modification respectively.
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R. Krishnakumar, R. Krishnakumar, Y. Ramprakash, Y. Ramprakash, V. Subramanian, V. Subramanian, K. Chandrasekara Pillai, K. Chandrasekara Pillai, A. S. Lakshmanan, A. S. Lakshmanan, } "Photoelectrochemical Studies On Spray Pyrolysed CdS Films On SnO2 Substrates", Proc. SPIE 0562, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion IV, (2 December 1985); doi: 10.1117/12.966305; https://doi.org/10.1117/12.966305
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