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  • Designing High-Performance ...
    Oh, Soong Ju; Berry, Nathaniel E; Choi, Ji-Hyuk; Gaulding, E. Ashley; Lin, Hangfei; Paik, Taejong; Diroll, Benjamin. T; Muramoto, Shin; Murray, Christopher B; Kagan, Cherie R

    Nano letters, 03/2014, Letnik: 14, Številka: 3
    Journal Article

    We report a simple, solution-based, postsynthetic colloidal, atomic layer deposition (PS-cALD) process to engineer stepwise the surface stoichiometry and therefore the electronic properties of lead chalcogenide nanocrystal (NC) thin films integrated in devices. We found that unlike chalcogen-enriched NC surfaces that are structurally, optically, and electronically unstable, lead chloride treatment creates a well-passivated shell that stabilizes the NCs. Using PS-cALD of lead chalcogenide NC thin films we demonstrate high electron field-effect mobilities of ∼4.5 cm2/(V s).