Rapid Charge-Transfer Cascade through SWCNT Composites Enabling Low-Voltage Losses for Perovskite Solar Cells

Severin Habisreutinger, Bryon Larson, Obadiah Reid, Jeffrey Blackburn, Nakita Noel

Research output: Contribution to journalArticlepeer-review

33 Scopus Citations

Abstract

Good charge selective contacts are vital to achieving efficient perovskite solar cells. The selectivity of such a contact is determined by its energetic offset or alignment with the bands of the perovskite absorber and, most importantly, by its interfacial recombination losses. In this study, we use single-walled carbon nanotubes (SWCNTs) as a high-mobility hole extraction layer at the interface with a perovskite absorber. When employed as a charge-transfer cascade-like structure with a low-mobility hole-selective contact, this configuration can suppress the interfacial recombination through the rapid removal of holes from the interface region. Reducing these recombination losses in turn results in very low voltage losses of less than 340 mV in n-i-p perovskite solar cells.

Original languageAmerican English
Pages (from-to)1872-1879
Number of pages8
JournalACS Energy Letters
Volume4
Issue number8
DOIs
StatePublished - 9 Aug 2019

Bibliographical note

Publisher Copyright:
© 2019 American Chemical Society.

NREL Publication Number

  • NREL/JA-5900-74228

Keywords

  • carbon nanotubes
  • perovskite solar cells
  • voltage-losses

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