The Effect of Exciton-Delocalizing Thiols on Intrinsic Dual Emitting Semiconductor Nanocrystals.

Autor: Jethi L; Department of Chemistry, McGill University, 801 Sherbrooke St. West, Montreal, QC, H3A0B8, Canada., Mack TG; Department of Chemistry, McGill University, 801 Sherbrooke St. West, Montreal, QC, H3A0B8, Canada., Krause MM; Department of Chemistry, McGill University, 801 Sherbrooke St. West, Montreal, QC, H3A0B8, Canada., Drake S; Department of Chemistry, McGill University, 801 Sherbrooke St. West, Montreal, QC, H3A0B8, Canada., Kambhampati P; Department of Chemistry, McGill University, 801 Sherbrooke St. West, Montreal, QC, H3A0B8, Canada. pat.kambhampati@mcgill.ca.
Jazyk: angličtina
Zdroj: Chemphyschem : a European journal of chemical physics and physical chemistry [Chemphyschem] 2016 Mar 03; Vol. 17 (5), pp. 665-9. Date of Electronic Publication: 2016 Jan 15.
DOI: 10.1002/cphc.201501049
Abstrakt: 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.
(© 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.)
Databáze: MEDLINE
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