Substrate-Controlled Electronic Properties of Perovskite Layer in Lateral Heterojunction Configuration

Aleksandra Bojar, Sean P. Dunfield, Stefania Cacovich, Mathieu Fregnaux, Talysa Klein, Rosemary Bramante, Fei Zhang, Davide Regaldo, Jean Baptiste Puel, Glenn Teeter, Joseph M. Luther, Muriel Bouttemy, Dennis Nordlund, Kai Zhu, David T. Moore, Maikel F.A.M. Van Hest, Jean Paul Kleider, Joseph J. Berry, Philip Schulz

Research output: Contribution to conferencePaperpeer-review


In this work, we fabricated halide perovskite-based lateral heterojunction devices with nickel oxide/titanium oxide all back contacts, allowing us to access the perovskite surface directly for analysis with various advanced techniques, including ultraviolet and X-ray photoemission spectroscopy (UPS/XPS), Kelvin probe force microscopy (KPFM), and surface photovoltage (SPY), to discern the role of selective contacts. Specifically, by tuning of the selectivity of the contacts, e.g., through varying the level of nickel oxidation, we show that the selectivity of the contacts induces a gradient in carrier concentration across the surface of the active layer that is connected to carrier extraction at the buried interface and hence to device functionality.

Original languageAmerican English
Number of pages3
StatePublished - 20 Jun 2021
Event48th IEEE Photovoltaic Specialists Conference, PVSC 2021 - Fort Lauderdale, United States
Duration: 20 Jun 202125 Jun 2021


Conference48th IEEE Photovoltaic Specialists Conference, PVSC 2021
Country/TerritoryUnited States
CityFort Lauderdale

Bibliographical note

Publisher Copyright:
© 2021 IEEE.

NREL Publication Number

  • NREL/CP-5K00-81127


  • carrier concentration
  • lateral heterojunction
  • perovskite solar cell
  • selectivity


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