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27‐3: Optimizing Charge Transport and Reducing Excitonic Loss Channels in Fluorescent Doped TADF OLEDs
Author(s) -
Häusermann Roger,
Jenatsch Sandra,
Leganés Carballo Jaime,
Sharifidehsari Hamed,
Blülle Balthasar,
Züfle Simon,
Liaptsis Georgios,
Ruhstaller Beat
Publication year - 2021
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1002/sdtp.14686
Subject(s) - dopant , oled , doping , trapping , optoelectronics , materials science , exciton , polar , charge (physics) , fluorescence , layer (electronics) , optics , nanotechnology , physics , condensed matter physics , ecology , astronomy , quantum mechanics , biology
A combined experimental and simulation study on a set of 4 OLEDs with 2 systematically varied guest dopants in the emission layer is presented. A numerical electro‐optical model is employed, demonstrating one consistent parameter set that describes both steady‐state and ac characteristics of all devices. The model accounts for charge transport and trapping, polar layers, and excitonic loss processes inducing an efficiency rolloff that can be correlated with the shape of the emission zone and the guest dopant concentrations. Furthermore, starting from the resulting parameter set, we show routes for optimized devices with a reduced roll‐off.