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Quantum Dots Supply Bulk- and Surface-Passivation Agents for Efficient and Stable Perovskite Solar Cells

  • Xiaopeng Zheng
  • , Joel Troughton
  • , Nicola Gasparini
  • , Yuanbao Lin
  • , Mingyang Wei
  • , Yi Hou
  • , Jiakai Liu
  • , Kepeng Song
  • , Zhaolai Chen
  • , Chen Yang
  • , Bekir Turedi
  • , Abdullah Y. Alsalloum
  • , Jun Pan
  • , Jie Chen
  • , Ayan A. Zhumekenov
  • , Thomas D. Anthopoulos
  • , Yu Han
  • , Derya Baran
  • , Omar F. Mohammed
  • , Edward H. Sargent
  • Osman M. Bakr
  • King Abdullah University of Science and Technology
  • University of Toronto

Research output: Contribution to journalArticlepeer-review

259 Scopus citations

Abstract

We report a facile processing strategy that utilizes perovskite quantum dots (QDs) to distribute elemental dopants uniformly across a MAPbI3 film and anchor ligands to the film's surface—reducing the film's trap-state density and rendering its surface hydrophobic. QD-treated MAPbI3 films yield solar cells with 21.5% power conversion efficiency (PCE) (versus 18.3% for non-QD-treated) and maintain 80% of their initial PCE under 1-sun continuous illumination for 500 h with improved thermal stability.

Original languageEnglish
Pages (from-to)1963-1976
Number of pages14
JournalJoule
Volume3
Issue number8
DOIs
StatePublished - 21 Aug 2019
Externally publishedYes

Keywords

  • doping
  • nanocrystals
  • perovskite solar cells
  • quantum dots
  • self-assembled monolayer
  • stability
  • surface modification

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