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
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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