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Sketch of dominating elementary processes being involved in charge separation at H2TPP/Au junctions under illumination [(1) absorption, (2) exciton formation, (3) exciton diffusion, (4) exciton dissociation, (5) escape of holes, and (6) internal photoemission].
Surface photovoltage spectra of a -thick H2TPP layer deposited on Au for various modulation frequencies.
Dynamic photovoltage signal as function of temperature under excitation with a red LED [(a), full triangles] or blue LED [(b), triangles]. The figure also shows the measurements without and with continuous bias light, blue bias LED [(a), full stars] and red bias LED [(b), stars], respectively.
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