Solution-processed high-performance organic light-emitting diodes containing a green-emitting MR-TADF dendrimer

Sen Wu, Dianming Sun*, Eli Zysman-Colman*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

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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.
Original languageEnglish
Pages (from-to)450-456
Number of pages7
JournalJournal of the Society for Information Display
Volume31
Issue number6
Early online date3 Apr 2023
DOIs
Publication statusPublished - 4 Jun 2023

Keywords

  • Multiresonant thermally activated delayed fluorescence
  • Solution-processed organic light-emitting diodes
  • Dendrimers

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