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Solvation of NiOxfor hole transport layer deposition in perovskite solar cells.

Peter J ArmstrongP S ChandrasekharSashil ChapagainCarmen M ClineMaikel F A M van HestThad DruffelCraig A Grapperhaus
Published in: Nanotechnology (2021)
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 NiOxparticle aggregates and stabilize suspension. A total of four inks were evaluated: 0X (Et3N with no alkyl xanthate), 4X (Et3N + potassiumn-butyl xanthate), 12X (Et3N + potassiumn-dodecyl xanthate), and 18X (Et3N + potassiumn-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.
Keyphrases
  • perovskite solar cells
  • ionic liquid
  • electron microscopy
  • room temperature
  • high resolution
  • single molecule
  • molecular dynamics
  • mass spectrometry
  • solid state
  • molecular dynamics simulations
  • binding protein
  • amino acid