Abstract
Steady-state and transient photoelectric responses were measured for monolayer assemblies composed of amphipathic porphyrin layers deposited on cadmium arachidate layers. Transient photocurrents due to excitation of chromophores in monolayer assemblies were observed for the first time, which showed a fast rise and a slow decay. Transient photocurrents decayed exponentially except for a small fraction at the initial stage. The decay constant of transient photocurrents and the value of the steady-state photocurrents decreased exponentially with the number of arachidate layers giving a characteristic decay length of 180-208 A. The decay of photocarriers in arachidate layers was strongly suggested.
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