Triplet exciton diffusion and phosphorescence quenching in Iridium(III)-Centered dendrimers

Ribierre, J. C., Ruseckas, A., Knights, K., Staton, S. V., Cumpstey, N., Burn. P. L. and Samuel, I. D. W. (2008) Triplet exciton diffusion and phosphorescence quenching in Iridium(III)-Centered dendrimers. Physical Review Letters, 100 1: Article Number: 017402. doi:10.1103/PhysRevLett.100.017402

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Author Ribierre, J. C.
Ruseckas, A.
Knights, K.
Staton, S. V.
Cumpstey, N.
Burn. P. L.
Samuel, I. D. W.
Title Triplet exciton diffusion and phosphorescence quenching in Iridium(III)-Centered dendrimers
Journal name Physical Review Letters   Check publisher's open access policy
ISSN 0031-9007
Publication date 2008-01-10
Sub-type Article (original research)
DOI 10.1103/PhysRevLett.100.017402
Open Access Status File (Publisher version)
Volume 100
Issue 1
Start page Article Number: 017402
Total pages 4
Place of publication College Park, Maryland, USA
Publisher American Physical Society
Collection year 2009
Language eng
Subject C1
030303 Optical Properties of Materials
020599 Optical Physics not elsewhere classified
970102 Expanding Knowledge in the Physical Sciences
970103 Expanding Knowledge in the Chemical Sciences
Abstract A study of triplet-triplet exciton annihilation and nonradiative decay in films of iridium(III)-centered phosphorescent dendrimers is reported. The average separation of the chromophore was tuned by the molecular structure and also by blending with a host material. It was found that triplet exciton hopping is controlled by electron exchange interactions and can be over 600 times faster than phosphorescence quenching. Nonradiative decay occurs by weak dipole-dipole interactions and is independent of exciton diffusion, except in very thin films (<20 nm) where surface quenching dominates the decay. ©2008 The American Physical Society
Keyword Light-emitting Devices
Conjugated Polymers
efficiency
Q-Index Code C1
Q-Index Status Confirmed Code

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2009 Higher Education Research Data Collection
School of Chemistry and Molecular Biosciences
 
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Created: Tue, 10 Mar 2009, 11:03:56 EST by Jennifer Falknau on behalf of School of Chemistry & Molecular Biosciences