Solution-processed high-performance organic light-emitting diodes containing a green-emitting MR-TADF dendrimer
Abstract
A multi-resonance thermally activated delayed fluorescence (MR-TADF) dendrimer emitter and a related reference MR-TADF compound were designed, synthesized, and characterized for use as narrowband emitters in solution-processed OLEDs. The 1 wt% doped films in PMMA film revealed that the compounds MR-D1 and MR-D2 showed narrowband green emission at λPL of 490 and 495 nm and with FWHM of 23 and 29 nm, respectively. The 50 wt% doped films in mCP still show narrowband green emission at λPL of 495 and 499 nm and with FWHM of 28 nm for MR-D1 and MR-D2, respectively, while conserving the small ΔEST of 0.14 and 0.13 eV, respectively. OLEDs containing an emissive layer consisting of 50 wt% MR-D1 and MR-D2 in mCP showed high EQEmax of 27.7% and 21.0%, respectively, and low efficiency roll-off of 19% and 30% at a luminance of 2000 cd/m−2.
Citation
Wu , S , Sun , D & Zysman-Colman , E 2023 , ' Solution-processed high-performance organic light-emitting diodes containing a green-emitting MR-TADF dendrimer ' , Journal of the Society for Information Display , vol. 31 , no. 6 , pp. 450-456 . https://doi.org/10.1002/jsid.1204
Publication
Journal of the Society for Information Display
Status
Peer reviewed
ISSN
1938-3657Type
Journal article
Rights
Copyright © 2023 The Authors. Journal of the Society for Information Display published by Wiley Periodicals LLC on behalf of Society for Information Display. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Description
Funding: S.W. thanks the China Scholarship Council (201906250199). D.S. acknowledges support from the Royal Academy of Engineering Enterprise Fellowship (EF2122-13106). E.Z.-C. acknowledge support from EPSRC (EP/L017008, EP/P010482/1).Collections
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