Mixed-Organic-Cation Tin Iodide for Lead-Free Perovskite Solar Cells with an Efficiency of 8.12.

ABSTRACT: In this work, a fully tin-based, mixed-organic-cation perovskite absorber (FA) _x (MA)_1-x SnI₃ (FA = NH₂CH = NH₂⁺, MA = CH₃NH₃⁺) for lead-free perovskite solar cells (PSCs) with inverted structure is presented. By optimizing the ratio of FA and MA cations, a maximum power conversion efficiency of 8.12% is achieved for the (FA)_0.75(MA)_0.25SnI₃-based device along with a high open-circuit voltage of 0.61 V, which originates from improved perovskite film morphology and inhibits recombination process in the device. The cation-mixing approach proves to be a facile method for the efficiency enhancement of tin-based PSCs.

SUBMITTER: Zhao Z 

PROVIDER: S-EPMC5700647 | biostudies-literature | 2017 Nov

REPOSITORIES: biostudies-literature