Photoinduced interfacial charge transfer

The kinetics of photoinduced interfacial charge transfer in semiconductor particles... 

Kinetic analysis of photoinduced interfacial charge transfer processes in colloidal semiconductor systems is frequently complex. Indeed, it is diffi-... 

Photoinduced interfacial charge transfer with dynamic quenching... 

Figure 12.10 (A) MLCT state structural dynamics of [Cu(I)(dmp)2] +/iv-> [Cu(II)(dmp)(dmp) ] as functions of two key reaction coordinates, the angle between the two ligand planes and the solvent ligation distance (B) structural dependence of XANES spectra for [Cu(I)(dmp)2] and [Cu(I)(dpp)2] (dpp = 2,9-dipenyl-l,10-phenan-throline) and their corresponding Cu(II) species generated by bulk electrolysis. The significant differences in the Cu(I) and Cu(II) spectra provide bases for monitoring the oxidation state and geometry during photoinduced interfacial charge transfer in DSSC composed of the derivatives of these complexes.

Zhang J, Yu J, Zhang Y, Li Q, Gong JR (2011) Visible light photocatalytic H-2-production activity of CuS/ZnS porous nanosheets based on photoinduced interfacial charge transfer. Nano Lett 11 4774-4779... 

These observations of an excitation wavelength dependence of the charge injection process show that photoinduced interfacial electron transfer from a molecular excited state to a continuum of acceptor levels can take place in competition with the relaxation from upper excited levels. The rather slow growth of the injection... 

The microwave conductivity is proportional to the number of free electronic charge carriers multiplied by their respective mobilities (the contribution of ions and dipoles can be neglected in a first approximation.). The microwave sensitivity constant S must be obtained by calibration. The potential-dependent photoinduced microwave conductivity (PMC) of a semiconductor resulting from illumination has been calculated analytically as a function of the interfacial charge-transfer and surface recombination rates (Schlichthorl and Tributsch, 1992). The starting point is the general set of equations of the form... 

Time-resolved photoinduced microwave conductivity measurements can be made as a function of applied potential. It has been shown that the measured minority-carrier lifetime r for moderately fast or slow interfacial charge transfer depends not only on the interfacial rate constant and surface recombination Ukc, but also on the energy band bending (AE) and the Debye length Ld (Tributsch, 1999). 

Almost all photoinduced surface electron transfer processes in sensitizer-semiconductor hetero-structures are most naturally characterized as two-step processes with initial excitation of the adsorbate, followed by interfacial electron transfer into a band of an acceptor state, as shown schematically in Figure 3.7. There is, however, also a more unusual case in which the lET is caused by a direct interfacial charge transfer excitation which is described in the... 

Figure 1. Two types of photoinduced charge separation (upper diagrams). The interfacial proton transfer (IPT) mechanism applies both to cytoplasmic proton binding and extracellular proton release at the membrane surface (only proton binding is shown). The oriented dipole (OD) mechanism applies to charge separation inside the membrane (or rather, inside bacteriorhodopsin). The thick curve across the membrane shows the space charge density profile, which, together with the potential profile across the membrane (not shown), allows us to deduce the two microscopic equivalent circuits shown in the lower diagrams. The two slightly different microscopic equivalent circuits are equivalent to the same irreducible equivalent circuit. (Reproduced with permission from reference...

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