title: The Effect of Exciton-Delocalizing Thiols on Intrinsic Dual Emitting Semiconductor Nanocrystals.
abstract: The emissive properties of thiol-capped CdSe nanocrystals (NCs) with intrinsic dual emission are investigated through temperature-dependent photoluminescence (PL) measurements. We demonstrate the influence of thiols on the relative PL intensities of the core and surface emissive states, as well as on the observed Stokes shifts. A redshift of both the core and surface PL in comparison with phosphonate-capped NCs is consistent with recent work exploring the effect of thiols as excitonic hole-delocalizing ligands. This observation is consistent with prior reports suggesting that surface excitons originate from electrons bound to cadmium trap states.
authors.affiliation: Department of Chemistry, McGill University, 801 Sherbrooke St. West, Montreal, QC, H3A0B8, Canada.
authors.forename: Lakshay
authors.initials: L
authors.lastname: Jethi
authors.affiliation: Department of Chemistry, McGill University, 801 Sherbrooke St. West, Montreal, QC, H3A0B8, Canada.
authors.forename: Timothy G
authors.initials: TG
authors.lastname: Mack
authors.affiliation: Department of Chemistry, McGill University, 801 Sherbrooke St. West, Montreal, QC, H3A0B8, Canada.
authors.forename: Michael M
authors.initials: MM
authors.lastname: Krause
authors.affiliation: Department of Chemistry, McGill University, 801 Sherbrooke St. West, Montreal, QC, H3A0B8, Canada.
authors.forename: Sebastian
authors.initials: S
authors.lastname: Drake
authors.affiliation: Department of Chemistry, McGill University, 801 Sherbrooke St. West, Montreal, QC, H3A0B8, Canada. pat.kambhampati@mcgill.ca.
authors.forename: Patanjali
authors.initials: P
authors.lastname: Kambhampati
keywords: ligands; nanocrystals; quantum dots; semiconductors; thiols