Photovoltaic Performance of PbS Quantum Dots Treated with Metal Salts

Dong Kyun Ko, Andrea Maurano, Su Kyung Suh, Donghun Kim, Gyu Weon Hwang, Jeffrey C. Grossman, Vladimir Bulović, Moungi G. Bawendi

Research output: Contribution to journalArticlepeer-review

73 Scopus citations


Recent advances in quantum dot surface passivation have led to a rapid development of high-efficiency solar cells. Another critical element for achieving efficient power conversion is the charge neutrality of quantum dots, as charge imbalances induce electronic states inside the energy gap. Here we investigate how the simultaneous introduction of metal cations and halide anions modifies the charge balance and enhances the solar cell efficiency. The addition of metal salts between QD deposition and ligand exchange with 1,3-BDT results in an increase in the short-circuit current and fill factor, accompanied by a distinct reduction in a crossover between light and dark current density-voltage characteristics.

Original languageEnglish (US)
Pages (from-to)3382-3388
Number of pages7
JournalACS Nano
Issue number3
StatePublished - Mar 22 2016

All Science Journal Classification (ASJC) codes

  • General Materials Science
  • General Engineering
  • General Physics and Astronomy


  • metal salts
  • nanocrystals
  • photovoltaics
  • quantum dots
  • solar cells


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