Triplet exciton diffusion and phosphorescence quenching in iridium(III)-centered dendrimers

J. C. Ribierre, A. Ruseckas, K. Knights, S. V. Staton, N. Cumpstey, P. L. Burn, I. D.W. Samuel

Research output: Contribution to journalArticle

55 Citations (Scopus)

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 (<20nm) where surface quenching dominates the decay.

Original languageEnglish
Article number017402
JournalPhysical Review Letters
Volume100
Issue number1
DOIs
Publication statusPublished - Jan 10 2008

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dendrimers
phosphorescence
iridium
quenching
excitons
decay
dipoles
chromophores
molecular structure
interactions
thin films
electrons

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

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

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.; Samuel, I. D.W.

In: Physical Review Letters, Vol. 100, No. 1, 017402, 10.01.2008.

Research output: Contribution to journalArticle

Ribierre, JC, Ruseckas, A, Knights, K, Staton, SV, Cumpstey, N, Burn, PL & Samuel, IDW 2008, 'Triplet exciton diffusion and phosphorescence quenching in iridium(III)-centered dendrimers', Physical Review Letters, vol. 100, no. 1, 017402. https://doi.org/10.1103/PhysRevLett.100.017402
Ribierre, J. C. ; Ruseckas, A. ; Knights, K. ; Staton, S. V. ; Cumpstey, N. ; Burn, P. L. ; Samuel, I. D.W. / Triplet exciton diffusion and phosphorescence quenching in iridium(III)-centered dendrimers. In: Physical Review Letters. 2008 ; Vol. 100, No. 1.
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