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Expressions for the dark and photocurrent of a semiconductor-electrolyte junction are derived. Charge transfer kinetics, surface recombination, recombination in the space-charge region, and series resistance are discussed in our model. A measurement of the I-V characteristics, both in the dark and under illumination, aids in the estimation of the parameters of the device. The model agrees with the general observed quantum efficiency variation with voltage.

transparent and viscous in contrast with the opaque and solid nature of the amorphous oxide film.The formation of the viscous film, which occurs only in the presence of adequate sulfate concentration, inhibits the evolution of hydrogen and the progress of other reactions that contribute to the formation of the amorphous oxide film. ABSTRACTTetraphenylethylene, triphenylethylene, stilbene, I,I diphenylethylene, and styrene were utilized as model compounds. Cyclic voltammetry in tetrahydrofuran, NBu4C]O4, showed that the radical anions of these compounds were protonated in this medium and are therefore stronger nucleophiles than polycyclic aromatic hydrocarbons for which similar protonation does not occur. The stability of the initial ionic species produced increased with the number of phenyl substituents in this series of substituted ethylenes. The cyclic voltammetric data was examined critically to determine the reversibility of the electron transfer steps, the number of electrons added per step, and the stability or lifetime of transient substances formed. Reaction mechanisms are proposed and the relevance of the findings to electropolymerization processes is indicated.The passage of an electrolytic current through a nonaqueous organic solution can produce a wide variety of reduction products at the cathode. These may include radicals, radical anions, carbanions, and other related intermediates (1).In our previous work, we had shown that in the presence of a suitable monomer, polymerization could take place (2). The rate of polymerization was, in ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 128.226.37.5 Downloaded on 2015-03-08 to IP 1 0 2 1 PO2 --[3] K 9 acu 4 ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 128.226.37.5 Downloaded on 2015-03-08 to IP