1.
Nano Lett
; 14(3): 1559-66, 2014 Mar 12.
Artigo
em Inglês
| MEDLINE
| ID: mdl-24499242
RESUMO
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 â¼4.5 cm(2)/(V s).