Ontology highlight
ABSTRACT:
SUBMITTER: Hwang GW
PROVIDER: S-EPMC4755932 | biostudies-literature | 2015 Aug
REPOSITORIES: biostudies-literature
Advanced materials (Deerfield Beach, Fla.) 20150701 30
Chemical oxidation of under-charged Pb atoms reduces the density of trap states by a factor of 40 in films of colloidal PbS quantum dots for devices. These emissive sub-bandgap states are a byproduct of several standard ligand-exchange procedures. X-ray photoelectron spectro-scopy measurements and density function theory simulations demonstrate that they are associated with under-charged Pb. ...[more]