Dielectric effect on the photovoltage loss in organic photovoltaic cells.

Chen, Song; Tsang, Sai-Wing; Lai, Tzung-Han; Reynolds, John R; So, Franky · Adv Mater · 2014

basic_science · Level V

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Abstract

The VOC loss in several polymer-fullerene solar cells is determined. Based on these data, a major source of photovoltage loss is attributed to the low dielectric constants of the polymers. Such loss is close to zero if the dielectric constant of the polymer-fullerene blend is close to 5.