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<p>Owing to their exceptional high power-to-weight ratio and mechanical flexibility, flexible perovskite solar cells (F-PSCs) are anticipated to have broader application prospects as compared to their rigid counterparts. In this study, we successfully fabricated F-PSCs on a polyethylene terephthalate (PET) substrate, employing a planar architecture of PET/ITO/SnO₂/(FAPbI<sub>3</sub>)<sub>1-x</sub>(MAPbBr<sub>3</sub>)<sub>x</sub>/Spiro-OMeTAD/Au. These devices achieved a remarkable champion power conversion efficiency (PCE) of 20.44%. Our investigations revealed that the properties of the perovskite active layer can be precisely tailored by manipulating the composition and stoichiometric ratios of the constituent ions. Specifically, devices incorporating the hybrid (FAPbI<sub>3</sub>)<sub>1-x</sub> (MAPbBr<sub>3</sub>)<sub>x</sub> active layer exhibited superior stability and higher PCE values compared to those based on MAPbI₃₋ₓClₓ. It is well-established that the antisolvent process can significantly enhance the quality of perovskite films by accelerating the nucleation rate. However, the quantity of antisolvent and its precise addition timing must be meticulously controlled. Consequently, we conducted a detailed examination of how these parameters influence the growth quality of (FAPbI<sub>3</sub>)<sub>1-x</sub> (MAPbBr<sub>3</sub>)<sub>x</sub> films and proposed a comprehensive film growth mechanism for perovskite films. Additionally, the fabricated F-PSCs demonstrated excellent operational stability, with a T₉₀ exceeding 300&#xa0;h.</p>

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Optimizing the perovskite crystal structure for high-efficient flexible perovskite solar cells via ion replacement engineering

  • 期刊论文

  • 发表日期：

    2025年8月24日

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  • Yinbin Zhu,
  • Yingchen Li,
  • Jun Li,
  • Jian Gao,
  • Yanting Lyu,
  • Jinpeng Xie,
  • Hongkun Cai

摘要

Owing to their exceptional high power-to-weight ratio and mechanical flexibility, flexible perovskite solar cells (F-PSCs) are anticipated to have broader application prospects as compared to their rigid counterparts. In this study, we successfully fabricated F-PSCs on a polyethylene terephthalate (PET) substrate, employing a planar architecture of PET/ITO/SnO₂/(FAPbI3)1-x(MAPbBr3)x/Spiro-OMeTAD/Au. These devices achieved a remarkable champion power conversion efficiency (PCE) of 20.44%. Our investigations revealed that the properties of the perovskite active layer can be precisely tailored by manipulating the composition and stoichiometric ratios of the constituent ions. Specifically, devices incorporating the hybrid (FAPbI3)1-x (MAPbBr3)x active layer exhibited superior stability and higher PCE values compared to those based on MAPbI₃₋ₓClₓ. It is well-established that the antisolvent process can significantly enhance the quality of perovskite films by accelerating the nucleation rate. However, the quantity of antisolvent and its precise addition timing must be meticulously controlled. Consequently, we conducted a detailed examination of how these parameters influence the growth quality of (FAPbI3)1-x (MAPbBr3)x films and proposed a comprehensive film growth mechanism for perovskite films. Additionally, the fabricated F-PSCs demonstrated excellent operational stability, with a T₉₀ exceeding 300 h.