Jump to main content
Jump to site search
PLANNED MAINTENANCE Close the message box

Scheduled maintenance work on Wednesday 27th March 2019 from 11:00 AM to 1:00 PM (GMT).

During this time our website performance may be temporarily affected. We apologise for any inconvenience this might cause and thank you for your patience.


Issue 10, 2019
Previous Article Next Article

A novel molecular design employing a backbone freezing linker for improved efficiency, sharpened emission and long lifetime in thermally activated delayed fluorescence emitters

Author affiliations

Abstract

A novel molecular design employing a backbone structure freezing linker was developed to improve the external quantum efficiency, lifetime and emission profile of thermally activated delayed fluorescence (TADF) emitters. The backbone structure freezing linker was introduced in the TADF emitters having diphenyltriazine as an acceptor and bicarbazole, triscarbazole, and indolocarbazole as donors. A dibenzofuran moiety was the backbone structure freezing unit between the donor and acceptor units, which are positioned at the 3 and 4 positions of dibenzofuran. The dibenzofuran linker worked as a rigid freezing unit compared with the common phenyl linker, which yielded an improved efficiency, sharpened emission spectrum and extended lifetime. The dibenzofuran mediated TADF emitter exhibited a high external quantum efficiency of 23.5% and lifetimes surpassing those of the state of the art green TADF emitters. This is the first work simultaneously reporting both a high efficiency over 20% and lifetime longer than other state of the art TADF emitters.

Graphical abstract: A novel molecular design employing a backbone freezing linker for improved efficiency, sharpened emission and long lifetime in thermally activated delayed fluorescence emitters

Back to tab navigation

Supplementary files

Publication details

The article was received on 11 Jan 2019, accepted on 06 Feb 2019 and first published on 07 Feb 2019


Article type: Paper
DOI: 10.1039/C9TC00214F
Citation: J. Mater. Chem. C, 2019,7, 2919-2926

  •   Request permissions

    A novel molecular design employing a backbone freezing linker for improved efficiency, sharpened emission and long lifetime in thermally activated delayed fluorescence emitters

    J. G. Yu, S. H. Han, H. L. Lee, W. P. Hong and J. Y. Lee, J. Mater. Chem. C, 2019, 7, 2919
    DOI: 10.1039/C9TC00214F

Search articles by author

Spotlight

Advertisements