Abstract
Non-traditional photocells such as organic photocells frequently show S-shaped current–voltage characteristics, which can be reproduced with not the simple one-diode equivalent-circuit model but an opposed two-diode model. In this study, a facile method for the extraction of the device parameters from S-shaped characteristics of a photocell using the opposed two-diode model is demonstrated. It was found that the fitting accuracy is insensitive to the ideality factors of the diodes. Moreover, contrary to the preceding studies, the exclusion of the series resistance was found to have a noticeable impact on the fitting results.
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