Effect of an external magnetic field on the up-conversion photoluminescence of organic films: the role of disorder in triplet-triplet annihilation.
We have investigated the influence of the magnetic field on the triplet-triplet annihilation process in organic films using a model multicomponent system for blue delayed up-conversion photoluminescence. In such a way, we have derived simple analytical expressions to estimate the overall annihilation probability, outlining the peculiar role played by the disorder and demonstrating that the triplet-triplet fusion in solid films is a diffusion limited process.
Mezyk
J
J
CNR-INFM and Department of Material Science, University of Milano-Bicocca, via Cozzi 53, I-20125 Milano, Italy. jakub.mezyk@mater.unimib.it
Tubino
R
R
Monguzzi
A
A
Mech
A
A
Meinardi
F
F