Jump to main content
Jump to site search


Blue Thermally Activated Delayed Fluorescence Emitter by Appending Fluorene Moiety to Carbazole Donor with Meta-Linkage for High-Efficiency OLED

Abstract

A new Thermally Activated Delayed Fluorescence (TADF) emitter, 3-(9,9'-Spirobi[fluoren]-6-yl)-9-(4-(4,6-diphenyl-1,3,5-triazin-2-yl)phenyl)-9H-carbazole (SFCC), was developed for blue organic light-emitting diodes (OLEDs), and its thermal, photophysical and electrochemical properties were systematically investigated. By introducing a 9,9’-spiro-bifluorene group through its C3 position to the C3 position of carbazole, the resulted new backbone had a more delocalized highest occupied molecular orbital (HOMO) than carbazole itself which led to and higher photoluminescence quantum yield (PLQY) compared with the control material, 3-Bromo-9-(4-(4,6-diphenyl-1,3,5-triazin-2-yl)phenyl)-9H-carbazole (TRTZ). The OLED based on SFCC as the blue TADF emitter has a maximum external quantum efficiency (EQE) of 10.59%, with Commission Internationale de L'Eclairage (CIE) coordinates of (0.17, 0.21), significantly surpassing the performance of the reference emitter TRTZ, indicating that the introduction of 9,9’-spiro-bifluorene unit is a promising strategy for the modification of TADF materials .

Back to tab navigation

Publication details

The article was received on 21 Dec 2017, accepted on 02 Feb 2018 and first published on 05 Feb 2018


Article type: Research Article
DOI: 10.1039/C7QM00605E
Citation: Mater. Chem. Front., 2017, Accepted Manuscript
  •   Request permissions

    Blue Thermally Activated Delayed Fluorescence Emitter by Appending Fluorene Moiety to Carbazole Donor with Meta-Linkage for High-Efficiency OLED

    J. Liang, Y. Li, Y. Yuan, S. Li, X. Zhu, S. Barlow, M. Fung, Z. Jiang, S. R. Marder and L. Liao, Mater. Chem. Front., 2017, Accepted Manuscript , DOI: 10.1039/C7QM00605E

Search articles by author

Spotlight

Advertisements