Solvent Engineering for Intermediates Phase, All-Ambient-Air-Processed in Organic-Inorganic Hybrid Perovskite Solar Cells.

ABSTRACT: Intermediate phase is considered an important aspect to deeply understand the crystallization procedure in the growth of high-quality perovskite layers by an anti-solvent technique. However, the moisture influence on the intermediate phase formation is not clear in air conditions as yet. In this work, pure (FA0.2MA1.8)Pb3X8(DMSO·DMF) intermediate phase was obtained in as-prepared perovskite film by spin-coating the precursor of co-solvent (DMSO and DMF) in an ambient air (RH20-30%). Moreover, the appropriate quantity of ethyl acetate (C4H8O2, EA) also controls the formation of pure intermediate phase. The uniform and homogeneous perovskite film was obtained after annealing this intermediate film. Therefore, the best power conversion efficiency (PCE) of perovskite solar cells (PSCs) is 16.2

SUBMITTER: Shi L 

PROVIDER: S-EPMC6669498 | biostudies-literature | 2019 Jun

REPOSITORIES: biostudies-literature