Related Experiment Video
Updated: Jul 7, 2026

Time-resolved Photophysical Characterization of Triplet-harvesting Organic Compounds at an Oxygen-free Environment Using an iCCD Camera
Published on: December 27, 2018
Triplet exciton diffusion and phosphorescence quenching in iridium(III)-centered dendrimers
J C Ribierre1, A Ruseckas, K Knights
1Organic Semiconductor Centre, SUPA, School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews, Fife KY16 9SS, United Kingdom.
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.
More Related Videos
Related Concept Videos
Variables Affecting Phosphorescence and Fluorescence
Photoluminescence: Fluorescence and Phosphorescence
A pair of electrons in a...
Photoluminescence: Applications
IR Spectrum Peak Intensity: Dipole Moment
IR Absorption Frequency: Delocalization
In IR spectroscopy,...

