articleScienceMay 25, 2023GREEN OA

Lead-chelating hole-transport layers for efficient and stable perovskite minimodules

CFChengbin FeiNLNengxu LiMWMengru WangXWXiaoming WangHGHangyu Gu

University of North Carolina at Chapel Hill · Applied Physical Sciences (United States) · +2 more institutions

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Abstract

The defective bottom interfaces of perovskites and hole-transport layers (HTLs) limit the performance of p-i-n structure perovskite solar cells. We report that the addition of lead chelation molecules into HTLs can strongly interact with lead(II) ion (Pb 2+ ), resulting in a reduced amorphous region in perovskites near HTLs and a passivated perovskite bottom surface. The minimodule with an aperture area of 26.9 square centimeters has a power conversion efficiency (PCE) of 21.8% (stabilized at 21.1%) that is certified by the National Renewable Energy Laboratory (NREL), which corresponds to a minimal small-cell efficiency of 24.6% (stabilized 24.1%) throughout the module area. Small-area cells and large-area…

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331
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41.18
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Authors

13

Topics & keywords

Topics
Keywords
  • Perovskite (structure)
  • Energy conversion efficiency
  • Materials science
  • Chelation
  • Amorphous solid
  • Aperture (computer memory)
  • Renewable energy
  • Chemical engineering
UN Sustainable Development Goals
  • Affordable and clean energy
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