Singlet energy transfer and singlet-singlet annihilation in light-emitting blends of organic semiconductors

A. Ruseckas; J. C. Ribierre; P. E. Shaw; S. V. Staton; P. L. Burn; I. D.W. Samuel

doi:10.1063/1.3253422

Singlet energy transfer and singlet-singlet annihilation in light-emitting blends of organic semiconductors

A. Ruseckas, J. C. Ribierre, P. E. Shaw, S. V. Staton, P. L. Burn, I. D.W. Samuel

Research output: Contribution to journal › Article › peer-review

21 Citations (Scopus)

Abstract

Excitation energy transfer from host to guest is studied in spin-cast blends of 4, 4′ -bis(N -carbazolyl)biphenyl (CBP) and a phosphorescent f_ac -tris(2-phenylpyridyl)iridium(III)-cored dendrimer using time resolved fluorescence. The kinetics of energy transfer are consistent with homogeneous dispersion of the dendrimers in the CBP host. Diffusion-controlled singlet-singlet exciton annihilation is observed in the CBP host at moderate excitation densities, similar to those encountered in high brightness light-emitting devices and organic lasers. The results are important for organic lighting and the understanding of exciton diffusion in guest-host systems for electrophosphorescence.

Original language	English
Article number	183305
Journal	Applied Physics Letters
Volume	95
Issue number	18
DOIs	https://doi.org/10.1063/1.3253422
Publication status	Published - 2009
Externally published	Yes

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.3253422

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title = "Singlet energy transfer and singlet-singlet annihilation in light-emitting blends of organic semiconductors",

abstract = "Excitation energy transfer from host to guest is studied in spin-cast blends of 4, 4′ -bis(N -carbazolyl)biphenyl (CBP) and a phosphorescent fac -tris(2-phenylpyridyl)iridium(III)-cored dendrimer using time resolved fluorescence. The kinetics of energy transfer are consistent with homogeneous dispersion of the dendrimers in the CBP host. Diffusion-controlled singlet-singlet exciton annihilation is observed in the CBP host at moderate excitation densities, similar to those encountered in high brightness light-emitting devices and organic lasers. The results are important for organic lighting and the understanding of exciton diffusion in guest-host systems for electrophosphorescence.",

author = "A. Ruseckas and Ribierre, {J. C.} and Shaw, {P. E.} and Staton, {S. V.} and Burn, {P. L.} and Samuel, {I. D.W.}",

note = "Funding Information: The authors are grateful to Dr. C. J. Yates for performing ellipsometry measurements and the EPSRC Grant No. EP/C542401/1 for financial support. Professor Paul Burn is recipient of an Australian Research Council Federation Fellowship (project number FF0668728).",

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volume = "95",

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AU - Ruseckas, A.

AU - Ribierre, J. C.

AU - Shaw, P. E.

AU - Staton, S. V.

AU - Burn, P. L.

AU - Samuel, I. D.W.

N1 - Funding Information: The authors are grateful to Dr. C. J. Yates for performing ellipsometry measurements and the EPSRC Grant No. EP/C542401/1 for financial support. Professor Paul Burn is recipient of an Australian Research Council Federation Fellowship (project number FF0668728).

PY - 2009

Y1 - 2009

N2 - Excitation energy transfer from host to guest is studied in spin-cast blends of 4, 4′ -bis(N -carbazolyl)biphenyl (CBP) and a phosphorescent fac -tris(2-phenylpyridyl)iridium(III)-cored dendrimer using time resolved fluorescence. The kinetics of energy transfer are consistent with homogeneous dispersion of the dendrimers in the CBP host. Diffusion-controlled singlet-singlet exciton annihilation is observed in the CBP host at moderate excitation densities, similar to those encountered in high brightness light-emitting devices and organic lasers. The results are important for organic lighting and the understanding of exciton diffusion in guest-host systems for electrophosphorescence.

AB - Excitation energy transfer from host to guest is studied in spin-cast blends of 4, 4′ -bis(N -carbazolyl)biphenyl (CBP) and a phosphorescent fac -tris(2-phenylpyridyl)iridium(III)-cored dendrimer using time resolved fluorescence. The kinetics of energy transfer are consistent with homogeneous dispersion of the dendrimers in the CBP host. Diffusion-controlled singlet-singlet exciton annihilation is observed in the CBP host at moderate excitation densities, similar to those encountered in high brightness light-emitting devices and organic lasers. The results are important for organic lighting and the understanding of exciton diffusion in guest-host systems for electrophosphorescence.

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Singlet energy transfer and singlet-singlet annihilation in light-emitting blends of organic semiconductors

Abstract

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