Control of exciton confinement in quantum dot-organic complexes through energetic alignment of interfacial orbitals.
NANO LETTERS(2013)
Abstract
This paper describes a method to control the quantum confinement, and therefore the energy, of excitonic holes in CdSe QDs through adsorption of the hole-delocalizing ligand phenyldithiocarbamate, PTC, and para substitutions of the phenyl ring of this ligand with electron-donating or -withdrawing groups. These substitutions control hole delocalization in the QDs through the energetic alignment of the highest occupied orbitals of PTC with the highest density-of-states region of the CdSe valence band, to which PTC couples selectively.
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Key words
Bathochromic shift,dithiocarbamate,carrier delocalization,confinement
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