We report the synthesis of a solution-processable, dodecyloxyphenyl-substituted azafullerene monoadduct (DPC₅₉N) and its application as electron acceptor in bulk heterojunction organic solar cells (BHJ-OSCs). Due to its relatively strong absorption of visible light, DPC₅₉Noutperforms PC₆₀BM in respect to short circuit current (J_SC) and external quantum efficiency (EQE) in blends with donor P3HT.