St Andrews Research Repository

St Andrews University Home
View Item 
  •   St Andrews Research Repository
  • University of St Andrews Research
  • University of St Andrews Research
  • University of St Andrews Research
  • View Item
  •   St Andrews Research Repository
  • University of St Andrews Research
  • University of St Andrews Research
  • University of St Andrews Research
  • View Item
  •   St Andrews Research Repository
  • University of St Andrews Research
  • University of St Andrews Research
  • University of St Andrews Research
  • View Item
  • Login
JavaScript is disabled for your browser. Some features of this site may not work without it.

Organic long persistent luminescence from a thermally activated delayed fluorescence compound

Thumbnail
View/Open
Li_2020_Organic_long_persistent_AdMa_202003911_CCBY.pdf (1.520Mb)
Date
10/11/2020
Author
Li, Wenbo
Li, Zhaoning
Si, Changfeng
Wong, Michael Yin
Jinnai, Kazuya
Gupta, Abhishek Kumar
Kabe, Ryota
Adachi, Chihaya
Huang, Wei
Zysman-Colman, Eli
Samuel, Ifor David William
Funder
EPSRC
EPSRC
EPSRC
EPSRC
EPSRC
Grant ID
EP/P010482/1
EP/P010482/1
EP/J01771X/1
EP/R035164/1
EP/R035164/1
Keywords
Afterglow
Charge recombination
Charge separation
Long-persistent luminescence (LPL)
Organic long-persistent luminescence (OLPL)
Thermally activated delayed fluorescence (TADF)
QC Physics
TK Electrical engineering. Electronics Nuclear engineering
DAS
Metadata
Show full item record
Altmetrics Handle Statistics
Altmetrics DOI Statistics
Abstract
Organic long‐persistent luminescence (OLPL) is one of the most promising methods for long‐lived‐emission applications. However, present room‐temperature OLPL emitters are mainly based on a bimolecular exciplex system which usually needs an expensive small molecule such as 2,8‐bis(diphenyl‐phosphoryl)dibenzo[b,d]thiophene (PPT) as the acceptor. In this study, a new thermally activated delayed fluorescence (TADF) compound, 3‐(4‐(9H‐carbazol‐9‐yl)phenyl)acenaphtho[1,2‐b]pyrazine‐8,9‐dicarbonitrile (CzPhAP), is designed, which also shows OLPL in many well‐known hosts such as PPT, 2,2′,2″‐(1,3,5‐benzinetriyl)‐tris(1‐phenyl‐1‐H‐benzimidazole) (TPBi), and poly(methyl methacrylate) (PMMA), without any exciplex formation, and its OLPL duration reaches more than 1 h at room temperature. Combining the low cost of PMMA manufacture and flexible designs of TADF molecules, pure organic, large‐scale, color tunable, and low‐cost room‐temperature OLPL applications become possible. Moreover, it is found that the onset of the 77 K afterglow spectra from a TADF‐emitter‐doped film is not necessarily reliable for determining the lowest triplet state energy level. This is because in some TADF‐emitter‐doped films, optical excitation can generate charges (electron and holes) that can later recombine to form singlet excitons during the phosphorescence spectrum measurement. The spectrum taken in the phosphorescence time window at low temperature may consequently consist of both singlet and triplet emission.
Citation
Li , W , Li , Z , Si , C , Wong , M Y , Jinnai , K , Gupta , A K , Kabe , R , Adachi , C , Huang , W , Zysman-Colman , E & Samuel , I D W 2020 , ' Organic long persistent luminescence from a thermally activated delayed fluorescence compound ' , Advanced Materials , vol. 32 , no. 45 , 2003911 . https://doi.org/10.1002/adma.202003911
Publication
Advanced Materials
Status
Peer reviewed
DOI
https://doi.org/10.1002/adma.202003911
ISSN
0935-9648
Type
Journal article
Rights
Copyright © 2020 The Authors. Published by Wiley‐VCH GmbH. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Description
Funding: UK EPSRC (grants EP/ P010482/1, EP/J01771X, EP/J00916, and EP/R035164/1). We gratefully acknowledge funding through the EPSRC NSFCBET lead agency agreement (EP/R010595/1,1706207) and a Leverhulme Trust Research Grant (RPG-2017-231).
Collections
  • University of St Andrews Research
URI
http://hdl.handle.net/10023/20743

Items in the St Andrews Research Repository are protected by copyright, with all rights reserved, unless otherwise indicated.

Related items

Showing items related by title, author, creator and subject.

  • Constitutionally selective dynamic covalent nanoparticle assembly 

    Marro, Nicolas; Suo, Rongtian; Naden, Aaron B.; Kay, Euan R. (2022-07-28) - Journal article
    The future of materials chemistry will be defined by our ability to precisely arrange components that have considerably larger dimensions and more complex compositions than conventional molecular or macromolecular building ...
  • High-resolution solid-state 13C NMR spectroscopy of the paramagnetic metal-organic frameworks, STAM-1 and HKUST-1 

    Dawson, Daniel M.; Jamieson, Lauren E.; Mohideen, M. Infas H.; McKinlay, Alistair C.; Smellie, Iain A.; Cadou, Romain; Keddie, Neil S.; Morris, Russell E.; Ashbrook, Sharon E. (2012-11) - Journal article
    Solid-state C-13 magic-angle spinning (MAS) NMR spectroscopy is used to investigate the structure of the Cu(II)-based metal-organic frameworks (MOFs), HKUST-1 and STAM-1, and the structural changes occurring within these ...
  • Calculating NMR parameters in aluminophosphates : evaluation of dispersion correction schemes 

    Sneddon, Scott; Dawson, Daniel M.; Pickard, Chris J.; Ashbrook, Sharon E. (2014-02) - Journal article
    Periodic density functional theory (DFT) calculations have recently emerged as a popular tool for assigning solid-state nuclear magnetic resonance (NMR) spectra. However, in order for the calculations to yield accurate ...
Advanced Search

Browse

All of RepositoryCommunities & CollectionsBy Issue DateNamesTitlesSubjectsClassificationTypeFunderThis CollectionBy Issue DateNamesTitlesSubjectsClassificationTypeFunder

My Account

Login

Open Access

To find out how you can benefit from open access to research, see our library web pages and Open Access blog. For open access help contact: openaccess@st-andrews.ac.uk.

Accessibility

Read our Accessibility statement.

How to submit research papers

The full text of research papers can be submitted to the repository via Pure, the University's research information system. For help see our guide: How to deposit in Pure.

Electronic thesis deposit

Help with deposit.

Repository help

For repository help contact: Digital-Repository@st-andrews.ac.uk.

Give Feedback

Cookie policy

This site may use cookies. Please see Terms and Conditions.

Usage statistics

COUNTER-compliant statistics on downloads from the repository are available from the IRUS-UK Service. Contact us for information.

© University of St Andrews Library

University of St Andrews is a charity registered in Scotland, No SC013532.

  • Facebook
  • Twitter