Article Dans Une Revue Nature Année : 2023

Homogenizing out-of-plane cation composition in perovskite solar cells

Xingyu Gao
  • Fonction : Auteur
Nam-Gyu Park
Xu Pan

Résumé

Abstract Perovskite solar cells with the formula FA 1− x Cs x PbI 3 , where FA is formamidinium, provide an attractive option for integrating high efficiency, durable stability and compatibility with scaled-up fabrication. Despite the incorporation of Cs cations, which could potentially enable a perfect perovskite lattice 1,2 , the compositional inhomogeneity caused by A-site cation segregation is likely to be detrimental to the photovoltaic performance of the solar cells 3,4 . Here we visualized the out-of-plane compositional inhomogeneity along the vertical direction across perovskite films and identified the underlying reasons for the inhomogeneity and its potential impact for devices. We devised a strategy using 1-(phenylsulfonyl)pyrrole to homogenize the distribution of cation composition in perovskite films. The resultant p–i–n devices yielded a certified steady-state photon-to-electron conversion efficiency of 25.2% and durable stability.

Dates et versions

hal-04943600 , version 1 (12-02-2025)

Identifiants

Citer

Zheng Liang, Yong Zhang, Huifen Xu, Wenjing Chen, Boyuan Liu, et al.. Homogenizing out-of-plane cation composition in perovskite solar cells. Nature, 2023, 624 (7992), pp.557-563. ⟨10.1038/s41586-023-06784-0⟩. ⟨hal-04943600⟩
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