Document Type

Journal Article

Department/ Unit

Department of Physics; Institute of Advanced Material

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.

Publication Year

2015

Journal Title

ACS Applied Materials and Interfaces

Volume number

7

Issue number

45

Publisher

American Chemical Society

First Page (page number)

24983

Last Page (page number)

24986

Referreed

1

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

ISSN (print)

19448244

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.

Keywords

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

ISSN (electronic)

19448252

Additional Files

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

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Physics Commons

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