Abstract
Two well characterized photosensitizers, namely, 4-m- methoxy-p-hydroxy benzylidene-2-m-methoxy- p-hydroxystyryl-1-phenyl-2-imidazolin-5-one (subsequently referred to as 2-imidazolin-5-one) and Rose Bengal, have been used together to sensitize sprayed ZnO thin film electrodes in aqueous and acetonitrile media. Through current–potential curves and action spectra (iphoto/λ), it has been confirmed that both dyes, when present together, contribute additively to the sensitized photocurrent. The quantum efficiencies of the dye- sensitized photocurrent at 480 and 555nm wavelengths (λmax of 2-imidazolin-5-one and Rose Bengal, respectively) were found to be 3.5 and 4.4%, respectively, in aqueous solution, while in acetonitrile medium the corresponding values were 4 and 6.5%.
Similar content being viewed by others
References
K. Rajeshwar, P. Singh and J. DuBow, Electrochim. Acta 23 (1978) 1117.
R. Memming, in ‘Electroanalytical Chemistry’ Vol. II, edited by A. J. Bard (Marcel Dekker, New York, 1979), p. 1.
S. R. Morrison, in ‘Electrochemistry at Semiconductor and Oxidized Metal Electrodes’ (Plenum Press, New York, 1980).
K. Kalyansundaram, Solar Cells 15 (1985) 93.
H. Gerischer and F. Willig, Topics in Current Chemistry 61 (1976) 31.
K. Hauffe, H. Pusch, J. Range, and D. Rein, in ‘Current Problems in Electrography’, edited by K. Hauffe and W. Berg (De Gruyter, Berlin, 1972).
K. Hauffe, in ‘Electrochemistry: The Past Thirty and Net Thirty Years’, edited by H. Bloom and F. Gutmann (Plenum Press, New York, 1977).
K. Hauffe, Phot. Sci. Eng. 20 (1976) 124.
M. D. Archer, J. Appl. Electrochem. 5 (1975) 17.
H. Gerischer, J. Electrochem. Soc. 125 (1978) 218c.
A. J. McEvoy and M. Grätzel, Sol. Energy Mat. Sol. Cells. 32 (1994) 221.
K. Hauffe, H. Pusch and J. Range, Z. Phys. Chem. (N.F.) 64 (1969) 122.
K. Hauffe and U. Bode, Faraday Discuss. 58 (1974) 281.
H. J. Danzmann, K. Hauffe, and Z. G. Szabo, Z. Phys.Chem. (N.F.) 104 (1977) 95.
N. Alonso-Vante, M. Belay, P. Chartier and V. Ern, Revue Phys. Appl. 16 (1981) 5.
L. Bahadur and L. Roy, Semicond. Sci. Technol. 10 (1995) 358.
L. Bahadur and T. N. Rao, Sol. Energy Mater. Sol. Cells 27 (1992) 347.
A. Jain and A. K. Mukerjee, J. Ind. Chem. Soc. 67 (1990) 973.
T. Yamase, H. Gerischer, M. Lubke and B. Pettinger, Ber. Bunsenges. Phys. Chem. 82 (1978) 1041: ibid. 83 (1979).
L. Bahadur and J. P. Pandey, Indian J. Eng. Mater. Sci. 4 (1997) 213.
A. J. Bard and H. Lund, in ‘Encyclopedia of Electrochem-istry of Elements’, Vol. 12 (Marcel Dekker, New York, 1973), p. 149.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Bahadur, L., Roy, L. A binary mixture of dyes (2-imidazolin-5-oneand Rose Bengal) for photosensitization of n-ZnO thin film electrodes in aqueous and acetonitrile media. Journal of Applied Electrochemistry 29, 109–116 (1999). https://doi.org/10.1023/A:1003473116474
Issue Date:
DOI: https://doi.org/10.1023/A:1003473116474