What controls the orientation of TADF emitters?

Wolfgang Brütting

doi:10.1117/12.2595332

1 August 2021 What controls the orientation of TADF emitters?

Wolfgang Brütting

Proceedings Volume 11808, Organic and Hybrid Light Emitting Materials and Devices XXV; 118080P (2021) https://doi.org/10.1117/12.2595332
Event: SPIE Organic Photonics + Electronics, 2021, San Diego, California, United States

Abstract

Thermally-activated delayed fluorescence (TADF) emitters can in principle allow for 100% internal quantum efficiency of organic light-emitting diodes (OLEDs), because the initially formed electron-hole pairs in the non-emissive triplet state can be efficiently converted into emissive singlets by reverse intersystem crossing. Moreover, TADF emitters offer the advantage to align them such that their optical transition dipole moments (TDMs) lie preferentially in the film plane. In this talk, we address the question which factors control the orientation of TADF emitters. Specifically, we discuss how guest-host interactions may be used to influence this parameter and propose an interplay of different factors being responsible. We infer that emitter orientation is mainly governed by the molecular shape of the TADF molecule itself and by the physical properties of the host. Ref: B.A. Naqvi et al., Frontiers in Chemistry 8, 750 (2020)

Conference Presentation

Citation Download Citation

Wolfgang Brütting "What controls the orientation of TADF emitters?", Proc. SPIE 11808, Organic and Hybrid Light Emitting Materials and Devices XXV, 118080P (1 August 2021); https://doi.org/10.1117/12.2595332

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