Jump to main content
Jump to site search

Issue 44, 2019
Previous Article Next Article

Fine-tuning the photophysical properties of thermally activated delayed fluorescent emitters using torsion angles: high performance sky-blue OLEDs

Author affiliations

Abstract

Isomeric strategy is of great significance in molecular design owing to its profound influence on physical properties. Herein, three isomeric molecules, 2,3′ACSO2, 2,4′ACSO2, and 3,4′ACSO2, were designed by connecting two electron-donor (D) acridine units to an electron-acceptor (A) diphenylsulfone unit through an asymmetric connection method. All three compounds possess distinct thermally activated delayed fluorescence (TADF) and aggregation-induced emission (AIE) characteristics on account of the highly twisted D–A structure. Their photophysical and electroluminescent properties can be well regulated through this isomeric strategy. Owing to its proper torsion angles and high photoluminescence quantum yields (PLQYs), the 3,4′ACSO2 based device achieves a maximum external quantum efficiency of 20.5% with sky blue emission. These results demonstrate that the isomeric strategy fine-tuning of the torsion angles is a practical method to optimize photophysical and electroluminescence properties.

Graphical abstract: Fine-tuning the photophysical properties of thermally activated delayed fluorescent emitters using torsion angles: high performance sky-blue OLEDs

Back to tab navigation

Supplementary files

Publication details

The article was received on 31 Aug 2019, accepted on 15 Oct 2019 and first published on 17 Oct 2019


Article type: Paper
DOI: 10.1039/C9TC04804A
J. Mater. Chem. C, 2019,7, 13953-13959

  •   Request permissions

    Fine-tuning the photophysical properties of thermally activated delayed fluorescent emitters using torsion angles: high performance sky-blue OLEDs

    L. Zhan, Y. Xiang, Z. Chen, K. Wu, S. Gong, G. Xie and C. Yang, J. Mater. Chem. C, 2019, 7, 13953
    DOI: 10.1039/C9TC04804A

Search articles by author

Spotlight

Advertisements