Randomized trial demonstrates improved efficiency in nonfullerene polymer solar cells, indicating potential for enhanced renewable energy solutions.
Fullerene-free and processing additive-free 8.5% efficient polymer solar cells are achieved by using a new 3,4-ethylenedioxythiophene-linked arylene diimide dimer with a 76° twist angle. The devices combine high (78-83%) external quantum efficiency with high (0.91-0.95 V) photovoltages and thus have relatively low optical bandgap energy loss.
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Hwang et al. (2015) studied this question.
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