Aluminum Complex-Core Carbazole Dendrimers Exhibiting Thermally Activated Delayed Fluorescence

Kohei Nakao, Minori Furukori, Guanting Liu, Takuya Hosokai, Takuma Yasuda, Ken Albrecht

Research output: Contribution to journalArticlepeer-review

Abstract

Carbazole dendrimers are promising materials for realizing highly efficient solution-processed organic light-emitting diodes (OLEDs). Merging carbazole dendrimers with a light-metal complex enables the development of solution-processable materials with excellent optical properties. In this work, highly luminescent Al complexes with carbazole-based dendritic ligands were developed. Metal complexation enhances photoluminescence quantum yields (PLQYs) and thermally activated delayed fluorescence (TADF) properties compared with the corresponding dendritic ligands. Consequently, the Al complex containing symmetric dendritic ligands exhibited a high PLQY of 70% with a delayed fluorescence lifetime of 16 μs in the doped film. Solution-processed OLEDs using these Al complexes as emitters exhibited excellent performance with an external electroluminescence quantum efficiency of 10.6% at a luminance of 100 cd m-2. These results present a strategy to improve the TADF properties and contribute to expanding the chemical space of the TADF materials.

Original languageEnglish
Pages (from-to)1393-1402
Number of pages10
JournalACS Applied Optical Materials
Volume2
Issue number7
DOIs
Publication statusPublished - Jul 26 2024

All Science Journal Classification (ASJC) codes

  • Spectroscopy
  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics

Fingerprint

Dive into the research topics of 'Aluminum Complex-Core Carbazole Dendrimers Exhibiting Thermally Activated Delayed Fluorescence'. Together they form a unique fingerprint.

Cite this