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Existence of optimum intermolecular spacing for maximum exciton diffusion length in tris(2-phenylpyridine) iridium(III)
- Source :
-
Organic Electronics . Jan2010, Vol. 11 Issue 1, p67-73. 7p. - Publication Year :
- 2010
-
Abstract
- Abstract: A study of one-dimensional exciton diffusion in tris(2-phenylpyridine) iridium(III) molecules as a function of intermolecular spacing is reported. We show for the first time the existence of an optimum intermolecular spacing that gives the longest diffusion length in [Ir(ppy)3] molecules. When the intermolecular spacing is too short, the long-range excitonic quenching becomes dominant; on the other hand, when it is too long, the exciton energy transfer is miniscule. A specially-designed organic light-emitting diode with separate exciton formation and emission was constructed to measure the one-dimensional exciton diffusion length. The maximum one-dimensional exciton diffusion length for this material is around 8.5nm for an inter-molecular separation of around 4.5nm. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 15661199
- Volume :
- 11
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Organic Electronics
- Publication Type :
- Academic Journal
- Accession number :
- 47151186
- Full Text :
- https://doi.org/10.1016/j.orgel.2009.09.029