Solvation of NiOx for Hole Transport Layer Deposition in Perovskite Solar Cells: Article No. 065403

Peter Armstrong, P. Chandrasekhar, Sashil Chapagain, Carmen Cline, Maikel van Hest, Thad Druffel, Craig Grapperhaus

Research output: Contribution to journalArticlepeer-review

4 Scopus Citations

Abstract

A series of nickel oxide (NiOx) inks, in the perovskite antisolvent chlorobenzene (CB) containing 15% ethanol, were prepared for the fabrication of p-i-n perovskite solar cells by blade coating. The inks included triethylamine (Et3N) and alkyl xanthate salts as ligands to disperse NiOx particle aggregates and stabilize suspension. A total of four inks were evaluated: 0X (Et3N with no alkyl xanthate), 4X (Et3N + potassium n-butyl xanthate), 12X (Et3N + potassium n-dodecyl xanthate), and 18X (Et3N + potassium n-octadecyl xanthate). The inks were characterized by UV-visible spectroscopy and FT-IR spectroscopy and the resulting films analyzed by thermogravimetry and scanning electron microscopy. Devices prepared using the 0X ink resulted in a peak power conversion efficiency (PCE) of 14.47% (0.25 cm2) and 9.96 % (1 cm2). The 0X devices showed no significant loss of PCE after 100 days in a nitrogen flow box. Devices prepared with inks containing alkyl xanthate ligand had lower PCE that decreased with decreasing chain length, 18X > 12X > 4X.
Original languageAmerican English
Number of pages9
JournalNanotechnology
Volume33
Issue number6
DOIs
StatePublished - 2021

NREL Publication Number

  • NREL/JA-5K00-81492

Keywords

  • functionalization
  • hole transport layer
  • hole transport material
  • ligand
  • nanoparticles
  • NiOx
  • perovskite solar cells

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