Characterization of Tunnel Oxides in TOPCon Solar Cells

Eric Rada, Arihana Roos, William Nemeth, David Young, Jason Stoke

Research output: NRELPoster

Abstract

The 1.12 nm thickness for the tunnel oxide layer is near the optimal range described by Choi et al. This thickness should be effective at enabling quantum tunneling; however, it is slightly lower than the reported optimal range which could negatively impact the passivation of the poly-Si interface. An appropriate balance between the two functions must be met to optimize efficiency. Follow up work could focus on testing the optimal range for tunnel oxide thickness in TOPCon solar cells, as well as improving the manufacturing process to produce better control of film thickness. This work could be extended into more advanced TOPCon solar cells including double or triple stack structures, as well as experimental pinhole designs.
Original languageAmerican English
PublisherNational Renewable Energy Laboratory (NREL)
StatePublished - 2024

Publication series

NamePresented at the Murdock College Science Research Conference, 8-9 November 2024, Vancouver, Washington

NREL Publication Number

  • NREL/PO-5900-91132

Keywords

  • spectroscopic ellipsometry
  • TOPCon solar cell
  • tunnel oxide

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