Abstract

The Au/H 2-phthalocyanine(H 2Pc)/C 60/Au heterojunction shows a photovoltaic effect with the conversion efficiency of 0.02%. An electrically detected electron spin resonance (EDESR) study is done for this system. The observed EDESR signal represents a decrease of the photocurrent due to the spin-dependent recombination of the localized electron-hole pair which is created by the photoinduced charge transfer between the H 2Pc and the C 60. The microwave-power-saturation behavior of the EDESR signal is not explained by the formula generally used.

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