Photoelectrochemical Studies On Spray Pyrolysed CdS Films On SnO2 Substrates

R. Krishnakumar; Y. Ramprakash; V. Subramanian; K. Chandrasekara Pillai; A. S. Lakshmanan

doi:10.1117/12.966305

2 December 1985 Photoelectrochemical Studies On Spray Pyrolysed CdS Films On SnO₂ Substrates

R. Krishnakumar, Y. Ramprakash, V. Subramanian, K. Chandrasekara Pillai, A. S. Lakshmanan

Proceedings Volume 0562, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion IV; (1985) https://doi.org/10.1117/12.966305
Event: 29th Annual Technical Symposium, 1985, San Diego, United States

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 V_oc = 0.51 V and short-circuit current density, J_sc= 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, V_fb = 1.7 V (SCE) and a donor density, N_D = 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 I_L)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 V_oc and J_sc 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.

Citation Download Citation

R. Krishnakumar, Y. Ramprakash, V. Subramanian, K. Chandrasekara Pillai, and 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); https://doi.org/10.1117/12.966305

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