4.6 Article

A six-carbazole-decorated cyclophosphazene as a host with high triplet energy to realize efficient delayed-fluorescence OLEDs

Journal

MATERIALS HORIZONS
Volume 1, Issue 2, Pages 264-269

Publisher

ROYAL SOC CHEMISTRY
DOI: 10.1039/c3mh00079f

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Funding

  1. Japan Society for the Promotion of Science (JSPS)
  2. Grants-in-Aid for Scientific Research [25708032] Funding Source: KAKEN

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A high triplet energy (ET) host material, hexakis(9H-carbazol-9-yl) cyclotriphosphazene (PzCz), is used in high-efficiency organic light-emitting diodes (OLEDs). PzCz (E-T = 3.00 eV) functions as an effective host for thermally activated delayed fluorescence (TADF) molecules. Highest external electroluminescence quantum efficiencies over 15% and 18% are achieved for blue-green and green TADF-OLEDs, respectively.

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