Use of C 6 H 5 NH 3 I as an organic cation instead of CH 3 (CH 2 ) 3 NH 3 I in the synthesis of 2D/3D perovskites (C 6 H 5 NH 3 I) 2 (CH 3 NH 3 I) n −1 (PbI 2 ) n leads to a material with significantly improved photovoltaic and optoelectronic properties with respect to the common butylammonium iodide-based perovskite, which is one of the most studied materials so far.
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Rodríguez‐Romero et al. (2017) studied this question.