Abstact

Organic lead halide perovskite solar cells (PSCs) have become a viable alternative for next-generation photovoltaic systems. The significance of reproducibly processing perovskite with less defects comes from the fact that imperfections have a major impact on the solar cell's performance and long-term stability. Although it is well known that cautious precursor processing has a significant influence on perovskite defect generation, there haven't been extensive investigations on the serial associations between precursor processing, perovskite orientation, and defect generation in PSCs. Making use of a unique precursor chemistry treatment technique that facilitates uniaxially oriented perovskite growth, it is aimed to mitigate defects of sequentially spin-coated perovskite. Through the temperature-dependent configurational entropic effect on coordination between iodoplumbate and dimethylsulfoxide (DMSO), a DMSO de-intercalation processing method is developed. This method enables the induction of uniaxially-oriented α-FA_0.9MA_0.1PbI_3-xBr_x (FA: formamidnium, MA: methylammomnium, x < 0.13) perovskite growth parallel to substrates. As a result, this processing delivered significant advances in power conversion efficiency (24.02%) and ambient operational stability under light. This straightforward technique provides a accesible process for producing efficient and stable perovskite solar cells, enabling uniaxially oriented perovskite fabrication without complicated procedures or additional substances.

More Information : De‐Intercalation of Iodoplumbate(DMSO)x Complex for Uniaxially Oriented Halide Perovskite Thin‐Film Solar Cells (Adv. Energy Mater. 39/2024) - Park - 2024 - Advanced Energy Materials - Wiley Online Library