Abstract
In this work, the effects of solvent additives on the trapping and recombination of carriers in polymer solar cells based on the blend of poly(3‐hexylthiophene) (P3HT) and indene‐C60‐bisadduct (ICBA) are investigated by measuring the ideality factor and transient photocurrent. The addition of a few percent of 4‐bromoanisole (BrAni) and 1‐chloronaphthalene (CN) can give rise to the preferable morphology with well‐ordered interpenetrating networks, which is beneficial for charge transport. Efficiency enhancement of polymer solar cells with solvent additives originates from the decreased defects and suppressed trap‐assisted recombination at the interface between the donor and acceptor materials.
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