Abstract
The conversion efficiency of solar cells made of organic semiconductors with metallic electrodes on opposite surfaces is calculated on the basis of a model of two diodes connected in series, but with opposite polarity. We find that the intrinsic conversion efficiency would be two orders of magnitude higher than the conventional value of 10−5–10−6 if the presently used solar‐cell configuration of organic semiconductors could be altered to have an Ohmic contact on one surface.

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