Charge generation in organic photovoltaics hinges upon the frontier molecular orbital energies of organic semiconductors, yet their precise determination is not trivial. Now, researchers compare various methods to determine these energies and show the need for an energy level offset to assist charge generation in non-fullerene-based solar cells.
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Nguyen, TQ. Barrier to charge generation. Nat Energy 7, 1120–1121 (2022). https://doi.org/10.1038/s41560-022-01159-7
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DOI: https://doi.org/10.1038/s41560-022-01159-7