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Proceedings Paper

Photoelectrochemical Studies On Spray Pyrolysed CdS Films On SnO2 Substrates
Author(s): R. Krishnakumar; Y. Ramprakash; V. Subramanian; K. Chandrasekara Pillai; A. S. Lakshmanan
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Paper 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.

Paper Details

Date Published: 2 December 1985
PDF: 6 pages
Proc. SPIE 0562, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion IV, (2 December 1985); doi: 10.1117/12.966305
Show Author Affiliations
R. Krishnakumar, Central Electrochemical Research Institute (India)
Y. Ramprakash, Central Electrochemical Research Institute (India)
V. Subramanian, Central Electrochemical Research Institute (India)
K. Chandrasekara Pillai, Central Electrochemical Research Institute (India)
A. S. Lakshmanan, Central Electrochemical Research Institute (India)


Published in SPIE Proceedings Vol. 0562:
Optical Materials Technology for Energy Efficiency and Solar Energy Conversion IV
Carl M. Lampert, Editor(s)

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