A1 Refereed original research article in a scientific journal
Single-Emitter White OLEDs via Microcavity Spectral Engineering
Authors: Kumar, Manish; Dutta, Arpan; Qureshi, Hassan A.; Papachatzakis, Michael A.; Abdelmagid, Ahmed Gaber; Daskalakis, Konstantinos S.
Publisher: WILEY-V C H VERLAG GMBH
Publishing place: WEINHEIM
Publication year: 2025
Journal: Advanced Optical Materials
Journal name in source: ADVANCED OPTICAL MATERIALS
Journal acronym: ADV OPT MATER
Article number: e01358
Number of pages: 9
ISSN: 2195-1071
eISSN: 2195-1071
DOI: https://doi.org/10.1002/adom.202501358
Web address : https://doi.org/10.1002/adom.202501358
Self-archived copy’s web address: https://research.utu.fi/converis/portal/detail/Publication/499586956
White organic light-emitting diodes (WOLEDs) are promising candidates for next-generation lighting and display technologies. However, conventional WOLED fabrication often relies on complex doping schemes or multiple color stacked emitting layers, complicating device design, and fabrication. Here, a simple approach for fabricating ITO-free WOLEDs with a single-component, using a planar aluminium microcavity, is presented. By engineering the cavity and surface plasmon polariton modes around the emission resonance of the high-efficiency blue thermally activated delayed fluorescence emitter DMAC-DPS, electroluminescence that is spectrally broadened to white light, with a tunable color temperature ranging from 3790 to 5050 K, is achieved. The WOLEDs are top-emitting and reach an external quantum efficiency of >5%. The results are supported by optical simulations and transient emission measurements, providing insights into the emission kinetics.
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Funding information in the publication:
This project had received funding from the Research Council of Finland project “Hyper-MOLED” (Decision number 348727), the European Research Council (ERC) under the European Unions Horizon 2020 research and innovation programme (grant agreement Number 948260), and the European Innovation Council through the project SCOLED (Grant Agreement Number 101098813).
