Aromatic spacer engineering for 2D halide perovskites and their application in solar cells

• DOI: 10.1016/j.mtelec.2024.100100
• Publication Date: 2024-04-30T09:29:38Z
• Authors: Yi Shen; Siliang Hu; You Meng; SenPo Yip; Johnny C. Ho
• Keywords: Aromatic amine

Perovskites have emerged as a promising new generation of photovoltaic conversion materials, gradually surpassing traditional silicon-based materials in solar cell research. This development is primarily due to their superior power-conversion efficiency (PCE), simple fabrication process, and cost-effective production. However, the low stability perovskite ionic crystals poses significant challenge stability, hindering progress devices. Although two-dimensional (2D) perovskites offer improved adding organic amine ions results quantum confinement effect that reduces optoelectronic performance To counter this issue, strategic design suitable spacer cations offers potential solution. Aromatic possess greater polarity structural adjustability compared aliphatic ions, making them advantageous mitigating effect. review focuses on phenylethylammonium (PEA) representative aromatic cation. It categorizes evolution these into four trajectories: alkyl chain modification, substitution hydrogen atoms ring with specific substituents, replacement benzene rings heterocycles, utilization multiple instead monoaromatic ring. The structure, properties, corresponding device utilized reported 2D are discussed, followed by presentation series factors for selecting designing future development.