Deep blue oxadiazole-containing thermally activated delayed fluorescence emitters for organic light-emitting diodes

Michael Yin Wong; Simonas Krotkus; Graeme Copley; Wenbo Li; Caroline Murawski; David Hall; Gordon Hedley; Marie Jaricot; David B. Cordes; Alexandra M. Z. Slawin; Yoann Olivier; David Beljonne; Luca Muccioli; Mónica Moral; Juan Carlos Sancho-García; Malte C Gather; Ifor D. W. Samuel; Eli Zysman-Colman

doi:10.1021/acsami.8b11136

Deep blue oxadiazole-containing thermally activated delayed fluorescence emitters for organic light-emitting diodes

Michael Yin Wong, Simonas Krotkus, Graeme Copley, Wenbo Li, Caroline Murawski, David Hall, Gordon Hedley, Marie Jaricot, David B. Cordes, Alexandra M. Z. Slawin, Yoann Olivier, David Beljonne, Luca Muccioli, Mónica Moral, Juan Carlos Sancho-García, Malte C Gather, Ifor D. W. Samuel, Eli Zysman-Colman

Research output: Contribution to journal › Article › peer-review

Abstract

A series of four novel deep blue to sky blue thermally activated delayed fluorescence (TADF) emitters (2CzdOXDMe, 2CzdOXD4MeOPh, 2CzdOXDPh and 2CzdOXD4CF₃Ph) have been synthesized and characterized. These oxadiazole-based emitters demonstrated bluer emission compared with reference emitter 2CzPN thanks to the weaker acceptor strength of oxadiazole moieties. In particular, the oxadiazole compounds doped in hosts (mCP and PPT) emitted from 435-474 nm with photoluminescence quantum yields ranging from 14%-55%. The emitters possess relatively large singlet-triplet excited state energy gaps (ΔEST) from 0.25-0.46 eV resulting in long lifetimes of the delayed components ranging from 4.8 to 25.8 ms. Electroluminescent devices using these oxadiazole emitters as dopant emitters gave emission maxima (λEL) from 446 nm to 474 nm with maximum external quantum efficiencies ranging from 4.2-11.2%.

Original language	English
Journal	ACS Applied Materials & Interfaces
Volume	In press
Early online date	7 Sept 2018
DOIs	https://doi.org/10.1021/acsami.8b11136
Publication status	E-pub ahead of print - 7 Sept 2018

Keywords

Thermally activated delayed fluorescence
Organic light emitting diodes
Oxadiazoles
Blue emitters
DFT calculations

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10.1021/acsami.8b11136

Wong_2018_ACSMI_Deepblue_AAM
Copyright © 2018 American Chemical Society. This work has been made available online in accordance with the publisher’s policies. This is the author created accepted version manuscript following peer review and as such may differ slightly from the final published version. The final published version of this work is available at: https://doi.org10.1021/acsami.8b11136
Accepted author manuscript, 10.6 MB

TADF Emitters for OLEDs - Ifor Samuel: TADF Emitters for OLEDs
Samuel, I. D. W. (PI)
EPSRC
1/03/17 → 28/02/20
Project: Standard
TADF Emitters for OLEDs - Eli Zysman: TADF Emitters for OLEDs
Zysman-Colman, E. (PI)
EPSRC
1/03/17 → 31/03/21
Project: Standard
H2020 MSCA Fellowship NeurOLED: H2020 MSCA Fellowship (Caroline Murawski)
Gather, M. C. (PI)
European Commission
1/03/16 → 19/07/18
Project: Fellowship

Deep blue oxadiazole-containing thermally activated delayed fluorescence emitters for organic light-emitting diodes (dataset 2)
Wong, Y. (Creator), Krotkus, S. (Creator), Copley, G. J. (Creator), Hedley, G. J. (Creator), Jaricot, M. (Creator), Cordes, D. B. (Creator), Slawin, A. M. Z. (Creator), Olivier, Y. (Creator), Beljonne, D. (Creator), Muccioli, L. (Creator), Moral, M. (Creator), Sancho-García, J. C. (Creator) & Zysman-Colman, E. (Creator), Cambridge Crystallographic Data Centre, 2019
https://dx.doi.org/10.5517/ccdc.csd.cc2064lz and 4 more links, https://dx.doi.org/10.5517/ccdc.csd.cc1k75kj, https://dx.doi.org/10.5517/ccdc.csd.cc2064hw, https://dx.doi.org/10.5517/ccdc.csd.cc2064jx, https://dx.doi.org/10.5517/ccdc.csd.cc2064ky (show fewer)
Dataset
Deep blue oxadiazole-containing thermally activated delayed fluorescence emitters for organic light-emitting diodes (dataset)
Wong, Y. (Creator), Krotkus, S. (Creator), Copley, G. J. (Creator), Li, W. (Creator), Murawski, C. (Creator), Hall, D. (Creator), Hedley, G. J. (Creator), Jaricot, M. (Creator), Cordes, D. B. (Creator), Slawin, A. M. Z. (Creator), Olivier, Y. (Creator), Beljonne, D. (Creator), Muccioli, L. (Creator), Moral, M. (Creator), Sancho-Garcia, J. C. (Creator), Gather, M. C. (Creator), Samuel, I. D. W. (Creator) & Zysman-Colman, E. (Creator), University of St Andrews, 8 Oct 2018
DOI: 10.17630/a3cce129-fbd2-40a7-ae01-337cbf579753
Dataset

File

Cite this

Wong, M. Y., Krotkus, S., Copley, G., Li, W., Murawski, C., Hall, D., Hedley, G., Jaricot, M., Cordes, D. B., Slawin, A. M. Z., Olivier, Y., Beljonne, D., Muccioli, L., Moral, M., Sancho-García, J. C., Gather, M. C., Samuel, I. D. W., & Zysman-Colman, E. (2018). Deep blue oxadiazole-containing thermally activated delayed fluorescence emitters for organic light-emitting diodes. ACS Applied Materials & Interfaces, In press. Advance online publication. https://doi.org/10.1021/acsami.8b11136

@article{bfac0ac445644da89f94e28077839dbb,

title = "Deep blue oxadiazole-containing thermally activated delayed fluorescence emitters for organic light-emitting diodes",

abstract = "A series of four novel deep blue to sky blue thermally activated delayed fluorescence (TADF) emitters (2CzdOXDMe, 2CzdOXD4MeOPh, 2CzdOXDPh and 2CzdOXD4CF3Ph) have been synthesized and characterized. These oxadiazole-based emitters demonstrated bluer emission compared with reference emitter 2CzPN thanks to the weaker acceptor strength of oxadiazole moieties. In particular, the oxadiazole compounds doped in hosts (mCP and PPT) emitted from 435-474 nm with photoluminescence quantum yields ranging from 14%-55%. The emitters possess relatively large singlet-triplet excited state energy gaps (ΔEST) from 0.25-0.46 eV resulting in long lifetimes of the delayed components ranging from 4.8 to 25.8 ms. Electroluminescent devices using these oxadiazole emitters as dopant emitters gave emission maxima (λEL) from 446 nm to 474 nm with maximum external quantum efficiencies ranging from 4.2-11.2%. ",

keywords = "Thermally activated delayed fluorescence, Organic light emitting diodes, Oxadiazoles, Blue emitters, DFT calculations",

author = "Wong, {Michael Yin} and Simonas Krotkus and Graeme Copley and Wenbo Li and Caroline Murawski and David Hall and Gordon Hedley and Marie Jaricot and Cordes, {David B.} and Slawin, {Alexandra M. Z.} and Yoann Olivier and David Beljonne and Luca Muccioli and M{\'o}nica Moral and Sancho-Garc{\'i}a, {Juan Carlos} and Gather, {Malte C} and Samuel, {Ifor D. W.} and Eli Zysman-Colman",

note = "EZ-C thanks the University of St Andrews for support. The authors are grateful to the EPSRC for financial support (grants EP/P010482/1, EP/J01771X and EP/J00916). IDWS is a Royal Society Wolfson Research Merit Award Holder. CM acknowledges funding by the European Commission through a Marie Sk{\l}odowska Curie Individual Fellowship (No. 703387).",

year = "2018",

month = sep,

day = "7",

doi = "10.1021/acsami.8b11136",

language = "English",

volume = "In press",

journal = "ACS Applied Materials & Interfaces",

issn = "1944-8244",

publisher = "American Chemical Society (ACS)",

}

Wong, MY, Krotkus, S, Copley, G, Li, W, Murawski, C, Hall, D, Hedley, G, Jaricot, M, Cordes, DB , Slawin, AMZ, Olivier, Y, Beljonne, D, Muccioli, L, Moral, M, Sancho-García, JC, Gather, MC , Samuel, IDW & Zysman-Colman, E 2018, 'Deep blue oxadiazole-containing thermally activated delayed fluorescence emitters for organic light-emitting diodes', ACS Applied Materials & Interfaces, vol. In press. https://doi.org/10.1021/acsami.8b11136

TY - JOUR

T1 - Deep blue oxadiazole-containing thermally activated delayed fluorescence emitters for organic light-emitting diodes

AU - Wong, Michael Yin

AU - Krotkus, Simonas

AU - Copley, Graeme

AU - Li, Wenbo

AU - Murawski, Caroline

AU - Hall, David

AU - Hedley, Gordon

AU - Jaricot, Marie

AU - Cordes, David B.

AU - Slawin, Alexandra M. Z.

AU - Olivier, Yoann

AU - Beljonne, David

AU - Muccioli, Luca

AU - Moral, Mónica

AU - Sancho-García, Juan Carlos

AU - Gather, Malte C

AU - Samuel, Ifor D. W.

AU - Zysman-Colman, Eli

N1 - EZ-C thanks the University of St Andrews for support. The authors are grateful to the EPSRC for financial support (grants EP/P010482/1, EP/J01771X and EP/J00916). IDWS is a Royal Society Wolfson Research Merit Award Holder. CM acknowledges funding by the European Commission through a Marie Skłodowska Curie Individual Fellowship (No. 703387).

PY - 2018/9/7

Y1 - 2018/9/7

N2 - A series of four novel deep blue to sky blue thermally activated delayed fluorescence (TADF) emitters (2CzdOXDMe, 2CzdOXD4MeOPh, 2CzdOXDPh and 2CzdOXD4CF3Ph) have been synthesized and characterized. These oxadiazole-based emitters demonstrated bluer emission compared with reference emitter 2CzPN thanks to the weaker acceptor strength of oxadiazole moieties. In particular, the oxadiazole compounds doped in hosts (mCP and PPT) emitted from 435-474 nm with photoluminescence quantum yields ranging from 14%-55%. The emitters possess relatively large singlet-triplet excited state energy gaps (ΔEST) from 0.25-0.46 eV resulting in long lifetimes of the delayed components ranging from 4.8 to 25.8 ms. Electroluminescent devices using these oxadiazole emitters as dopant emitters gave emission maxima (λEL) from 446 nm to 474 nm with maximum external quantum efficiencies ranging from 4.2-11.2%.

AB - A series of four novel deep blue to sky blue thermally activated delayed fluorescence (TADF) emitters (2CzdOXDMe, 2CzdOXD4MeOPh, 2CzdOXDPh and 2CzdOXD4CF3Ph) have been synthesized and characterized. These oxadiazole-based emitters demonstrated bluer emission compared with reference emitter 2CzPN thanks to the weaker acceptor strength of oxadiazole moieties. In particular, the oxadiazole compounds doped in hosts (mCP and PPT) emitted from 435-474 nm with photoluminescence quantum yields ranging from 14%-55%. The emitters possess relatively large singlet-triplet excited state energy gaps (ΔEST) from 0.25-0.46 eV resulting in long lifetimes of the delayed components ranging from 4.8 to 25.8 ms. Electroluminescent devices using these oxadiazole emitters as dopant emitters gave emission maxima (λEL) from 446 nm to 474 nm with maximum external quantum efficiencies ranging from 4.2-11.2%.

KW - Thermally activated delayed fluorescence

KW - Organic light emitting diodes

KW - Oxadiazoles

KW - Blue emitters

KW - DFT calculations

U2 - 10.1021/acsami.8b11136

DO - 10.1021/acsami.8b11136

M3 - Article

SN - 1944-8244

VL - In press

JO - ACS Applied Materials & Interfaces

JF - ACS Applied Materials & Interfaces

ER -

Deep blue oxadiazole-containing thermally activated delayed fluorescence emitters for organic light-emitting diodes

Abstract

Keywords

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Projects

TADF Emitters for OLEDs - Ifor Samuel: TADF Emitters for OLEDs

TADF Emitters for OLEDs - Eli Zysman: TADF Emitters for OLEDs

H2020 MSCA Fellowship NeurOLED: H2020 MSCA Fellowship (Caroline Murawski)

Datasets

Deep blue oxadiazole-containing thermally activated delayed fluorescence emitters for organic light-emitting diodes (dataset 2)

Deep blue oxadiazole-containing thermally activated delayed fluorescence emitters for organic light-emitting diodes (dataset)

Cite this