Nature Communications (Nov 2024)

Micro-homogeneity of lateral energy landscapes governs the performance in perovskite solar cells

  • Pengju Shi,
  • Bin Ding,
  • Donger Jin,
  • Muratcan Oner,
  • Xu Zhang,
  • Yuan Tian,
  • Yahui Li,
  • Ke Zhao,
  • Zengyi Sun,
  • Jiazhe Xu,
  • Shaochen Zhang,
  • Runchen Lai,
  • Lingyu Xiao,
  • Chenyue Wang,
  • Caner Değer,
  • Liuwen Tian,
  • Jiahui Shen,
  • Yuan Cheng,
  • Ilhan Yavuz,
  • Xiaohe Miao,
  • Enzheng Shi,
  • Deren Yang,
  • Yong Ding,
  • Mohammad Khaja Nazeeruddin,
  • Rui Wang,
  • Jingjing Xue

DOI
https://doi.org/10.1038/s41467-024-53953-4
Journal volume & issue
Vol. 15, no. 1
pp. 1 – 10

Abstract

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Abstract Suppression of energy disorders in the vertical direction of a photovoltaic device, along which charge carriers are forced to travel, has been extensively studied to reduce unproductive charge recombination and thus achieve high-efficiency perovskite solar cells. In contrast, energy disorders in the lateral direction of the junction for large-area modules are largely overlooked. Herein, we show that the micro-inhomogeneity characteristics in the surface lateral energetics of formamidinium (FA)-based perovskite films also significantly influence the device performance, particularly with accounting for the stability and scale-up aspects of the devices. By using organic amidinium passivators, instead of the most commonly used organic ammonium ones, the micro-inhomogeneity in the lateral energy landscapes can be suppressed, greatly improving device stability and efficiency of FA-based single-junction perovskite solar cells.