Title: Localized trions as metastable charged states in conjugated polymers
Authors: Kadashchuk, A ×
Arkhipov, V. I
Heremans, Paul
Blonsky, I
Nespurek, S
Baessler, H #
Issue Date: 2007
Publisher: Taylor & francis ltd
Series Title: Molecular Crystals and Liquid Crystals vol:467 pages:33-45
Abstract: We have shown that a charged trion consisting of two on-chain polarons of the same sign and a trapped polaron of the opposite sign can be metastable with respect to both dissociation and recombination. A trion can be created upon fusion of a free polaron with a neutral pair, which eliminates a high Coulomb potential barrier for fusion of two charge carriers into a bipolaron. We argue that trions can be created by photoexcitation of a conjugated polymer, in which illumination creates a high density of geminate pairs. Since the metastable trion is anchored by a deep-trapped charge, it is immobile and can be considered as a coulombically trapped bipolaron, although the last may not exist as a free particle. We employ the concept of localized trions in order to explain the reversible photoinduced fatigue of thermally stimulated luminescence in films of poly[methyl(phenyl)silylene].
ISSN: 1542-1406
Publication status: published
KU Leuven publication type: IT
Appears in Collections:ESAT - MICAS, Microelectronics and Sensors
× corresponding author
# (joint) last author

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