title: Enhanced rate of radiative decay in CdSe quantum dots upon adsorption of an exciton-delocalizing ligand.
abstract: This paper describes the enhancement of the quantum yield of photoluminescence (PL) of CdSe quantum dots (QDs) upon the adsorption of an exciton-delocalizing ligand, phenyldithiocarbamate. Increasing the apparent excitonic radius by only 10% increases the value of the radiative rate constant by a factor of 1.8 and the PL quantum yield by a factor of 2.4. Ligand exchange therefore simultaneously perturbs the confinement energy of charge carriers and enhances the probability of band-edge transitions.
authors.affiliation: Department of Chemistry, Northwestern University , 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States.
authors.forename: Shengye
authors.initials: S
authors.lastname: Jin
authors.forename: Rachel D
authors.initials: RD
authors.lastname: Harris
authors.forename: Bryan
authors.initials: B
authors.lastname: Lau
authors.forename: Kenneth O
authors.initials: KO
authors.lastname: Aruda
authors.forename: Victor A
authors.initials: VA
authors.lastname: Amin
authors.forename: Emily A
authors.initials: EA
authors.lastname: Weiss
mesh_terms: D000327:Adsorption; D000838:Anions; D019187:Cadmium Compounds / Q000737:chemistry*; D007700:Kinetics; D008024:Ligands; D036103:Nanotechnology / Q000379:methods; D009991:Oscillometry; D011336:Probability; D045663:Quantum Dots; D018036:Selenium Compounds / Q000737:chemistry*; D013696:Temperature; D013859:Thiocarbamates / Q000737:chemistry
chemical_list: D000838:Anions; D019187:Cadmium Compounds; D008024:Ligands; D018036:Selenium Compounds; D013859:Thiocarbamates; C058667:cadmium selenide
keywords: CdSe quantum dot; dithiocarbamate; exciton delocalization; oscillator strength; radiative decay