Ultrathin polymethylmethacrylate interlayers boost performance of hybrid tin halide perovskite solar cells

Introducing a polymethylmethacrylate (PMMA) layer at the (PEA)(0.2)(FA)(0.8)SnI3 perovskite/hole transport layer interface leads to a remarkable improvement in the photogenerated current density and fill factor, resulting in an increase in the power conversion efficiency from 6.5% to 10%. PMMA is proposed to mitigate interfacial charge losses and to induce a more favourable distribution of 2D perovskite phases, elucidating a pathway towards the development of high-performance tin-based perovskite solar cells.

Automated summary

Introducing a PMMA layer at the interface of (PEA)(0.2)(FA)(0.8)SnI3 perovskite and hole transport layer leads to a significant improvement in photogenerated current density and fill factor, resulting in an increase in power conversion efficiency from 6.5% to 10%. PMMA is suggested to reduce interfacial charge losses and promote a more favorable distribution of 2D perovskite phases, showing a promising pathway for the development of high-performance tin-based perovskite solar cells.