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Ru(bipy)2+3 + Fe3+ → Ru(bipy)3+3 + Fe2+ system are investigated by measurement of the current—time and he potential—time characteristics. Under conditions of high light intensity and low to medium workloadas of the cell, a pronounced maximum in the voltage-time curve is observed. This maximum appears after some milliseconds and it amounts to four times the stationary value. The experimental results are explained and the transients simulated, using the theoretical model developed in Part I of this series.
doi:10.1016/0013-4686(75)85038-9 
Copyright © 1975 Published by Elsevier Science Ltd. All rights reserved.
Photogalvanic cells
Received 19 April 1974.
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Abstract
An analysis of photogalvanic cells is carried out and applied to a specific system, iron-thionine, with only slight simplifications. The criteria for successful cell design are given and discussed. It is concluded that many formidable obstacles to practical application exist. The principal difficulties are the following: (1) Diffusion to the electrodes and reaction there must be sufficiently rapid to make bulk back reactions unimportant. (2) A means for keeping at least one active species from reaching one electrode must be found. (3) A sufficient range of the solar spectrum must be exploited without increasing the rate of photon absorption to the point where bulk back reaction becomes important. These problems are discussed in some detail and quantitative criteria are presented in terms of absorbed photon flux, cell size parameters, chemical rate constants, exchange current densities, overvoltages and diffusion coefficients.
