title: Electron and hole transfer from indium phosphide quantum dots.
abstract: Electron- and hole-transfer reactions are studied in colloidal InP quantum dots (QDs). Photoluminescence quenching and time-resolved transient absorption (TA) measurements are utilized to examine hole transfer from photoexcited InP QDs to the hole acceptor N,N,N',N'-tetramethyl-p-phenylenediamine (TMPD) and electron transfer to nanocrystalline titanium dioxide (TiO2) films. Core-confined holes are effectively quenched by TMPD, resulting in a new approximately 4-ps component in the TA decay. It is found that electron transfer to TiO2 is primarily mediated through surface-localized states on the InP QDs.
authors.affiliation: National Renewable Energy Laboratory, Golden, Colorado 80401, USA.
authors.forename: J L
authors.initials: JL
authors.lastname: Blackburn
authors.forename: D C
authors.initials: DC
authors.lastname: Selmarten
authors.forename: R J
authors.initials: RJ
authors.lastname: Ellingson
authors.forename: M
authors.initials: M
authors.lastname: Jones
authors.forename: O
authors.initials: O
authors.lastname: Micic
authors.forename: A J
authors.initials: AJ
authors.lastname: Nozik