Doping effect on an organic solar cell composed of two-layer thin pigment films of metal-free phthalocyanine (H2Pc) and perylene tetracarboxylic derivative (Me-PTC) was investigated. When H2 or NH3 was doped to the Me-PTC film during vacuum deposition, the photocurrent density drastically increased and the power conversion efficiency of the cell reached about 1% even under 75 mW cm−2 white light.
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Hiramoto et al. (1990) studied this question.
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