Printable High-Efficiency and Stable FAPbBr(3) Perovskite Solar Cells for Multifunctional Building-Integrated Photovoltaics

Perovskite solar cells (PSCs) show great promise for next-generation building-integrated photovoltaic (BIPV) applications because of their abundance of raw materials, adjustable transparency, and cost-effective printable processing. Owing to the complex perovskite nucleation and growth control, the fabrication of large-area perovskite films for high-performance printed PSCs is still under active investigation. Herein, the study proposes an intermediate-phase-transition-assisted one-step blade coating for an intrinsic transparent formamidinium lead bromide (FAPbBr(3)) perovskite film. The intermediate complex optimizes the crystal growth path of FAPbBr(3), resulting in a large-area, homogeneous, and dense absorber film. A champion efficiency of 10.86% with high open-circuit voltage up to 1.57 V is obtained with a simplified device architecture of glass/FTO/SnO2/FAPbBr(3)/carbon. Moreover, the unencapsulated devices maintain 90% of their initial power conversion efficiency after aging at 75 & DEG;C for 1000 h in ambient air, and 96% after maximum power point tracking for 500 h. The printed semitransparent PSCs, with average visible light transmittance over 45%, demonstrate high efficiencies for both small devices (8.6%) and 10 x 10 cm(2) modules (5.55%). Finally, the ability to customize the color, transparency, and thermal insulation properties of FAPbBr(3) PSCs makes them high prospects as multifunctional BIPVs.

Automated summary

In this study, an intermediate-phase-transition-assisted one-step blade coating method is proposed for the fabrication of transparent formamidinium lead bromide (FAPbBr(3)) perovskite films. The intermediate complex optimizes the crystal growth path, resulting in large-area, homogeneous, and dense absorber films. The fabricated perovskite solar cells show high efficiency, stability, and adjustable transparency, making them promising for next-generation building-integrated photovoltaic applications.