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The maximum theoretical solar conversion efficiency is calculated for an organic photovoltaic energy conversion system based on PVK-TNF. Charge separation is assumed to take place at a Schottky barrier. At high fields (108 V m−1) the theoretical energy conversion efficiency approaches a maximum value of 2% with a 2-eV barrier. Lower efficiencies are found for barriers greater than or lower than 2.0 eV and at lower fields.
Reucroft et al. (Sun,) studied this question.