Improved perovskite crystallization via antisolvent-assisted processed using additive engineering for efficient perovskite solar cells

Here, anti-solvent-assisted deposition method coupled with the additive engineering is employed to fabricate the perovskite solar cells (PSCs). The utilization of 1-3-methylImidazole iodized salt (DMII) additive in the precursor solution during the anti-solvent-assisted deposition process is helpful to get the high-quality perovskite films with the improved the morphology, crystallization and photophysical properties. Various analytical examinations prove that the perovskite film by this strategy possesses of the excellent crystallinity, enlarged grain size, less crystal boundary, and smoother surface. Base on the high quality of the perovskite films, the efficiency of electron generation and transportation in the PSCs is enhanced, which promote the efficient photovoltaic conversion for PSCs. As a result, the best power conversion efficiency (PCE) of the PSCs has reached 14.56% contrasting with the reference pristine cell achieved 12.80%, respectively. It is demonstrated that the additive engineering cooperating with the anti-solvent-assisted process is a convenient and effective method to get the high-quality light absorption layer and the superior photovoltaic performance PSCs.