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Journal article
Charge transport and electric field-dependent exciton dissociation in organic semiconductors measured using accumulation at an insulator-semiconductor layer
Applied physics letters, Vol.127(11), 112109
2025
Abstract
Knowledge of charge transport and exciton behavior in organic semiconductor materials is essential to develop high-performance devices. Experimental methods based on the photogeneration of charges offer the opportunity to probe both exciton dissociation and the subsequent charge transport in the same device under the same conditions. In this work, we study the common organic light-emitting diode material tris(2-phenylpyridine)iridium(III), Ir(ppy)3, and show that the yield of free charge carriers from photogenerated excitons is strongly dependent on the electric field in the semiconductor. We simultaneously measure the hole mobility in this material. Our experiments are based on the accumulation of charge carriers at a semiconductor–insulator interface, and we find that the dynamics of this charging process provide information about exciton dissociation and charge carrier mobility. This work illustrates the importance of considering the electric field dependence of exciton dissociation when interpreting charge transport experiments.
Details
- Title
- Charge transport and electric field-dependent exciton dissociation in organic semiconductors measured using accumulation at an insulator-semiconductor layer
- Authors/Creators
- Asad Mahmood - James Cook UniversityMile Gao - Centre for Organic Photonics & Electronics (COPE), School of Chemistry and Molecular Biosciences, The University of Queensl, Brisbane, QLD, AustraliaMitchell Greenberg - James Cook UniversityAlmantas Pivrikas - Murdoch University, School of Mathematics, Statistics, Chemistry and PhysicsIan Gentle - The University of QueenslandBronson Philippa - James Cook University
- Publication Details
- Applied physics letters, Vol.127(11), 112109
- Publisher
- AIP Publishing
- Grant note
- DP210102192 / Australian Research Council (http://data.elsevier.com/vocabulary/SciValFunders/501100000923) Australian Research Council (http://data.elsevier.com/vocabulary/SciValFunders/501100000923)
- Identifiers
- 991005815049407891
- Copyright
- © 2025 Author(s).
- Murdoch Affiliation
- School of Mathematics, Statistics, Chemistry and Physics
- Language
- English
- Resource Type
- Journal article
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