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Efficient electrogenerated chemiluminescence from CdTe quantum dots with coreactants

Title
Efficient electrogenerated chemiluminescence from CdTe quantum dots with coreactants
Authors
Shin, IS[Shin, Ik-Soo]Kim, H[Kim, Hasuck]Bang, JH[Bang, Jin Ho]
DGIST Authors
Kim, H[Kim, Hasuck]
Issue Date
2011-12-01
Citation
Journal of Electroanalytical Chemistry, 663(1), 24-29
Type
Article
Article Type
Article
Keywords
AnnihilationCadmium AlloysCadmium CompoundsCdTeCdTe Quantum DotsChemiluminescenceCoreactantCoreactantsDirect OxidationElectrogenerated ChemiluminescenceIR(III) ComplexIridiumLight EmittersOrganic SolventsPeroxydisulfatePositive IonsQuantum YieldRadical AnionsRadical CationsSemiconductor Quantum DotsTunabilities
ISSN
1572-6657
Abstract
While quantum dots (QDs) have attracted much interest in electrogenerated chemiluminescence (ECL) as a light emitter due to their high quantum yield and bandgap tunability, the fundamental ECL characteristics of QDs in various conditions still remain elusive. In this study, we investigate the ECL generation from CdTe QDs dispersed in organic solvents in the presence of a coreactant. ECL generation via the annihilation between the radical cation of CdTe QDs and their radical anion is not efficient because of the short-lived, unstable radical cation of CdTe QDs. The coreactant, tetra-n-butylammonium peroxydisulfate, can facilitate the ECL generation from CdTe QDs via more efficient generation of the radical cation formed by direct oxidation of the radical anion of CdTe QDs. A poor ECL emitter, Ir(III) complex ((pq) 2Ir(dbm)), is examined as a novel coreactant for CdTe QDs, and it turns out that this new ECL system is a very efficient ECL generator. This great improvement is attributed to the collaborative enhancement of ECL from both CdTe and (pq)2Ir(dbm). © 2011 Elsevier B.V. All rights reserved.
URI
http://hdl.handle.net/20.500.11750/3425
DOI
10.1016/j.jelechem.2011.09.023
Publisher
Elsevier
Files:
There are no files associated with this item.
Collection:
Energy Science and EngineeringETC1. Journal Articles


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