Complementary Interface Formation Toward High-Efficiency All-Back-Contact Perovskite Solar Cells: Article No. 100363

Kevin Prince, Marco Nardone, Sean Dunfield, Glenn Teeter, Mirzojamshed Mirzokarimov, Emily Warren, David Moore, Joseph Berry, Colin Wolden, Lance Wheeler

Research output: Contribution to journalArticlepeer-review

17 Scopus Citations

Abstract

All-back-contact (ABC) architectures for perovskite photovoltaics represent untapped potential for higher efficiency and enhanced durability compared to conventional planar architectures. Interface engineering can be more complex in ABC designs, because both the electron and hole transport layers (ETLs/HTLs) are simultaneously exposed during processing. Herein, we fabricate ABC perovskite solar cells with a non-stabilized current-voltage scan power conversion efficiency >10% by developing complementary interface processing. UV-ozone exposure followed by annealing increases the work function and reduces the defect density of the NiOx HTL and removed contamination from the TiO2 ETL, which increases voltage and current collection. We measure the chemical composition of each transport layer interface using photoelectron spectroscopy and then use the resulting trends to inform a two-dimensional drift-diffusion model. The model suggests that further reduction of charged interface defect density, increase in the hole selective contact work function, and passivation of the front surface will enable >20% of ABC devices.
Original languageAmerican English
Number of pages18
JournalCell Reports Physical Science
Volume2
Issue number3
DOIs
StatePublished - 2021

NREL Publication Number

  • NREL/JA-5900-77652

Keywords

  • all-back-contact perovskite solar cells
  • drift-diffusion model
  • interdigitated back contact
  • interface defects
  • interface engineering
  • lateral heterojunction
  • metal halide perovskite
  • nickel oxide
  • quasi-interdigitated electrodes

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