Theoretical study of host-guest exciton-polaron quenching rates in phosphorescent OLED emission layers

Clint van Hoesel; Reinder Coehoorn; Peter A. Bobbert

doi:10.1117/12.2645104

11 January 2023 Theoretical study of host-guest exciton-polaron quenching rates in phosphorescent OLED emission layers

Clint van Hoesel, Reinder Coehoorn, Peter A. Bobbert

Proceedings Volume 12336, Frontiers in Luminescent Organic Semiconductor Materials and Devices; 1233609 (2023) https://doi.org/10.1117/12.2645104
Event: SPIE Photonex, 2022, Birmingham, United Kingdom

Abstract

It is of utmost importance to understand the effects of exciton-polaron quenching (EPQ) in OLEDs, in order to be able to counteract its detrimental effects. In this work we provide a method for calculating Förster radii of EPQ processes in phosphorescent emitter-host films based on a combination of theoretical and experimental methods. We model absorption spectra using multi-scale ab initio methods. The emission spectra of emitters can still be obtained experimentally, allowing for accurate determination of the Förster EPQ radius. Using our method we have determined Förster radii for various emitter-host combinations prevalent in OLEDs.

Conference Presentation

Citation Download Citation

Clint van Hoesel, Reinder Coehoorn, and Peter A. Bobbert "Theoretical study of host-guest exciton-polaron quenching rates in phosphorescent OLED emission layers", Proc. SPIE 12336, Frontiers in Luminescent Organic Semiconductor Materials and Devices, 1233609 (11 January 2023); https://doi.org/10.1117/12.2645104

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