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Singlet energy transfer and singlet-singlet annihilation in light-emitting blends of organic semiconductors
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/content/aip/journal/apl/95/18/10.1063/1.3253422
2009-11-03
2014-08-01

Abstract

Excitation energy transfer from host to guest is studied in spin-cast blends of -bis(-carbazolyl)biphenyl (CBP) and a phosphorescent -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 brightnesslight-emitting devices and organic lasers. The results are important for organic lighting and the understanding of excitondiffusion in guest-host systems for electrophosphorescence.

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Scitation: Singlet energy transfer and singlet-singlet annihilation in light-emitting blends of organic semiconductors
http://aip.metastore.ingenta.com/content/aip/journal/apl/95/18/10.1063/1.3253422
10.1063/1.3253422
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