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19 June 2024 Simulation-assisted experimental study of the mechanism of the efficiency roll-off due to triplet-polaron quenching in OLEDs
Hiroki Tomita, Peter A. Bobbert, Christ H. L. Weijtens, Reinder Coehoorn
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Proceedings Volume PC13013, Organic Electronics and Photonics: Fundamentals and Devices IV; PC130130L (2024) https://doi.org/10.1117/12.3022235
Event: SPIE Photonics Europe, 2024, Strasbourg, France
Abstract
Triplet-polaron quenching (TPQ) is one of the main causes of exciton loss in OLED devices, which seriously limits the luminance efficiency. In host-guest blend systems, which a phosphorescent “guest” emitter is diluted in a “host” material, the polarons can be located on a host or a guest molecule, and can be holes or electrons, dependent on the energy level structure. However, the mechanism of TPQ and the relation of the interaction strength with the molecular structure are not well known. Here, we present an integrated approach of experimental and simulation methods for obtaining TPQ interaction strength.
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Hiroki Tomita, Peter A. Bobbert, Christ H. L. Weijtens, and Reinder Coehoorn "Simulation-assisted experimental study of the mechanism of the efficiency roll-off due to triplet-polaron quenching in OLEDs", Proc. SPIE PC13013, Organic Electronics and Photonics: Fundamentals and Devices IV, PC130130L (19 June 2024); https://doi.org/10.1117/12.3022235
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KEYWORDS
Quenching
Organic light emitting diodes
Molecules
Monte Carlo methods
Excitons
Molecular interactions
Photoluminescence
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