Document Type

Journal Article

Department/Unit

Department of Physics; Institute of Advanced Material

Language

English

Abstract

A blended bimolecular exciplex formation was demonstrated between two individual donor and acceptor molecules, which are tris(4-carbazoyl-9-ylphenyl)amine (TCTA) and 2,4,6-tris(3′-(pyridin-3-yl)biphenyl-3-yl)-1,3,5-triazine (Tm3PyBPZ). The photoluminescence spectrum of the exciplex in the solid state showed an emission with a peak around 514 nm (∼2.49 eV). By applying this exciplex as an emitting layer, a highly efficient all-fluorescent organic lighting emitting diode with maximum efficiencies of 13.1% and 53.4 lm/W can be realized under an extremely low turn-on voltage of only 2.4 V. The thermally activated delayed fluorescence (TADF) process is believed to be responsible for the excellent device performance.

Keywords

intermolecular exciplex, organic light-emitting diode (OLED), thermally activated delayed fluorescence (TADF), triplet exciton reharvesting, weak coupled donor and acceptor

Publication Date

2015

Source Publication Title

ACS Applied Materials and Interfaces

Volume

7

Issue

45

Start Page

24983

End Page

24986

Publisher

American Chemical Society

Peer Reviewed

1

Copyright

This document is the unedited Author’s version of a Submitted Work that was subsequently accepted for publication in ACS Applied Materials and Interfaces, copyright © American Chemical Society after peer review. To access the final edited and published work see http://pubs.acs.org/doi/10.1021/acsami.5b05597.

Funder

This work was supported by Research Grants Council (AoE/P-02/12) and Innovation and Technology Commission (UIM/216).

DOI

10.1021/acsami.5b05597

Link to Publisher's Edition

https://dx.doi.org/10.1021/acsami.5b05597

ISSN (print)

19448244

ISSN (electronic)

19448252

Additional Files

JA-4861-28979_suppl.pdf (626 kB)

Included in

Physics Commons

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