1.1% DMF incorporation in MAI/IPA precursor for 50% efficiency enhancement of planar perovskite solar cells

Here we show the effects of N,N-Dimethylformamide (DMF) incorporation in the MAI/IPA precursor on the crystallization process of perovskite film based on MAI/IPA precursor. Perovskite thin films were prepared by the two-step solution deposition. With the incorporation of DMF in the MAI/IPA precursor, the device performance can be enhanced effectively, especially for the short-circuit current density (Jsc) and power conversation efficiency (PCE). Facile perovskite conversation with and without DMF in MAI precursor boosted the efficiency from 6% to 9.8%. Additionally, we further identify the proper ratio of DMF in the precursor is about 1.1%. Besides, the structures of perovskite were investigated by the X-ray diffraction and SEM, which show that the film have a high crystallization quality.