Highly efficient green and red narrowband emissive organic light-emitting diodes employing multi-resonant thermally activated delayed fluorescence emitters

Sen Wu; Abhishek  Kumar Gupta; Kou Yoshida; Junyi Gong; David Hall; David  B. Cordes; Alexandra  M. Z. Slawin; Ifor  D. W. Samuel; Eli Zysman-Colman

doi:10.1002/anie.202213697

Highly efficient green and red narrowband emissive organic light-emitting diodes employing multi-resonant thermally activated delayed fluorescence emitters

Sen Wu, Abhishek Kumar Gupta, Kou Yoshida, Junyi Gong, David Hall, David B. Cordes, Alexandra M. Z. Slawin, Ifor D. W. Samuel^*, Eli Zysman-Colman^*

^*Corresponding author for this work

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

Abstract

Herein, we demonstrate how judicious selection of donor decorating a central multi-resonant thermally activated delayed fluorescence (MR-TADF) core based on DiKTa can lead to very high-performance OLEDs. Decorating the DiKTa core with triphenylamine (TPA) and diphenylamine (DPA), 3TPA-DiKTa and 3DPA-DiKTa exhibit bright, narrowband green and red emission in doped films, respectively. The OLEDs based on these emitters showed record-high performance with maximum external quantum efficiencies (EQEmax) for this family of emitters, with a EQEmax of 30.8% for 3TPA-DiKTa at λEL of 551 nm and 16.7% for 3DPA-DiKTa at λEL of 613 nm. The efficiency roll-off in the OLEDs was improved significantly by using 4CzIPN as an assistant dopant in hyperfluorescence (HF) devices. The outstanding device performance has been attributed to preferential horizontal orientation of the transition dipole moments of 3TPA-DiKTa and 3DPA-DiKTa.

Original language	English
Article number	e202213697
Number of pages	9
Journal	Angewandte Chemie International Edition
Volume	61
Issue number	52
Early online date	23 Nov 2022
DOIs	https://doi.org/10.1002/anie.202213697
Publication status	Published - 23 Dec 2022

Keywords

Multi-resonant thermally activated delayed fluorescence
Organic light-emitting diodes
Horizontal orientation
Hyperfluorescence
Thermally activated delayed fluorescence (TADF)

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Copyright © 2022 The Authors. Angewandte Chemie International Edition 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.
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Cite this

Wu, S., Gupta, A. K., Yoshida, K., Gong, J., Hall, D., Cordes, D. B., Slawin, A. M. Z., Samuel, I. D. W., & Zysman-Colman, E. (2022). Highly efficient green and red narrowband emissive organic light-emitting diodes employing multi-resonant thermally activated delayed fluorescence emitters. Angewandte Chemie International Edition, 61(52), Article e202213697. https://doi.org/10.1002/anie.202213697

@article{5c441a6989a74988bf7e537cbafd28c9,

title = "Highly efficient green and red narrowband emissive organic light-emitting diodes employing multi-resonant thermally activated delayed fluorescence emitters",

abstract = "Herein, we demonstrate how judicious selection of donor decorating a central multi-resonant thermally activated delayed fluorescence (MR-TADF) core based on DiKTa can lead to very high-performance OLEDs. Decorating the DiKTa core with triphenylamine (TPA) and diphenylamine (DPA), 3TPA-DiKTa and 3DPA-DiKTa exhibit bright, narrowband green and red emission in doped films, respectively. The OLEDs based on these emitters showed record-high performance with maximum external quantum efficiencies (EQEmax) for this family of emitters, with a EQEmax of 30.8% for 3TPA-DiKTa at λEL of 551 nm and 16.7% for 3DPA-DiKTa at λEL of 613 nm. The efficiency roll-off in the OLEDs was improved significantly by using 4CzIPN as an assistant dopant in hyperfluorescence (HF) devices. The outstanding device performance has been attributed to preferential horizontal orientation of the transition dipole moments of 3TPA-DiKTa and 3DPA-DiKTa.",

keywords = "Multi-resonant thermally activated delayed fluorescence, Organic light-emitting diodes, Horizontal orientation, Hyperfluorescence, Thermally activated delayed fluorescence (TADF)",

author = "Sen Wu and Gupta, {Abhishek Kumar} and Kou Yoshida and Junyi Gong and David Hall and Cordes, {David B.} and Slawin, {Alexandra M. Z.} and Samuel, {Ifor D. W.} and Eli Zysman-Colman",

note = "Funding: S. W. thanks the China Scholarship Council (201906250199). A. K. G. is grateful to the Royal Society for Newton International Fellowship NF171163. EZ-C and IDWS acknowledge support from EPSRC (EP/L017008, EP/P010482/1). We are also grateful for financial support from the University of St Andrews Restarting Research Funding Scheme (SARRF) which is funded through the Scottish Funding Council grant reference SFC/AN/08/020. EZ-C is a Royal Society Leverhulme Trust Senior Research fellow (SRF\R1\201089). We would also like to thank the Leverhulme Trust (RPG-2016-047) for financial support.",

year = "2022",

month = dec,

day = "23",

doi = "10.1002/anie.202213697",

language = "English",

volume = "61",

journal = "Angewandte Chemie International Edition",

issn = "1433-7851",

publisher = "John Wiley & Sons, Ltd",

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Wu, S, Gupta, AK , Yoshida, K, Gong, J, Hall, D, Cordes, DB , Slawin, AMZ , Samuel, IDW & Zysman-Colman, E 2022, 'Highly efficient green and red narrowband emissive organic light-emitting diodes employing multi-resonant thermally activated delayed fluorescence emitters', Angewandte Chemie International Edition, vol. 61, no. 52, e202213697. https://doi.org/10.1002/anie.202213697

TY - JOUR

T1 - Highly efficient green and red narrowband emissive organic light-emitting diodes employing multi-resonant thermally activated delayed fluorescence emitters

AU - Wu, Sen

AU - Gupta, Abhishek Kumar

AU - Yoshida, Kou

AU - Gong, Junyi

AU - Hall, David

AU - Cordes, David B.

AU - Slawin, Alexandra M. Z.

AU - Samuel, Ifor D. W.

AU - Zysman-Colman, Eli

N1 - Funding: S. W. thanks the China Scholarship Council (201906250199). A. K. G. is grateful to the Royal Society for Newton International Fellowship NF171163. EZ-C and IDWS acknowledge support from EPSRC (EP/L017008, EP/P010482/1). We are also grateful for financial support from the University of St Andrews Restarting Research Funding Scheme (SARRF) which is funded through the Scottish Funding Council grant reference SFC/AN/08/020. EZ-C is a Royal Society Leverhulme Trust Senior Research fellow (SRF\R1\201089). We would also like to thank the Leverhulme Trust (RPG-2016-047) for financial support.

PY - 2022/12/23

Y1 - 2022/12/23

N2 - Herein, we demonstrate how judicious selection of donor decorating a central multi-resonant thermally activated delayed fluorescence (MR-TADF) core based on DiKTa can lead to very high-performance OLEDs. Decorating the DiKTa core with triphenylamine (TPA) and diphenylamine (DPA), 3TPA-DiKTa and 3DPA-DiKTa exhibit bright, narrowband green and red emission in doped films, respectively. The OLEDs based on these emitters showed record-high performance with maximum external quantum efficiencies (EQEmax) for this family of emitters, with a EQEmax of 30.8% for 3TPA-DiKTa at λEL of 551 nm and 16.7% for 3DPA-DiKTa at λEL of 613 nm. The efficiency roll-off in the OLEDs was improved significantly by using 4CzIPN as an assistant dopant in hyperfluorescence (HF) devices. The outstanding device performance has been attributed to preferential horizontal orientation of the transition dipole moments of 3TPA-DiKTa and 3DPA-DiKTa.

AB - Herein, we demonstrate how judicious selection of donor decorating a central multi-resonant thermally activated delayed fluorescence (MR-TADF) core based on DiKTa can lead to very high-performance OLEDs. Decorating the DiKTa core with triphenylamine (TPA) and diphenylamine (DPA), 3TPA-DiKTa and 3DPA-DiKTa exhibit bright, narrowband green and red emission in doped films, respectively. The OLEDs based on these emitters showed record-high performance with maximum external quantum efficiencies (EQEmax) for this family of emitters, with a EQEmax of 30.8% for 3TPA-DiKTa at λEL of 551 nm and 16.7% for 3DPA-DiKTa at λEL of 613 nm. The efficiency roll-off in the OLEDs was improved significantly by using 4CzIPN as an assistant dopant in hyperfluorescence (HF) devices. The outstanding device performance has been attributed to preferential horizontal orientation of the transition dipole moments of 3TPA-DiKTa and 3DPA-DiKTa.

KW - Multi-resonant thermally activated delayed fluorescence

KW - Organic light-emitting diodes

KW - Horizontal orientation

KW - Hyperfluorescence

KW - Thermally activated delayed fluorescence (TADF)

UR - https://doi.org/10.26434/chemrxiv-2022-1j3np-v2

U2 - 10.1002/anie.202213697

DO - 10.1002/anie.202213697

M3 - Article

SN - 1433-7851

VL - 61

JO - Angewandte Chemie International Edition

JF - Angewandte Chemie International Edition

IS - 52

M1 - e202213697

ER -

Highly efficient green and red narrowband emissive organic light-emitting diodes employing multi-resonant thermally activated delayed fluorescence emitters

Abstract

Keywords

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Eli Zysman-colman SRF: New Frontiers in Multi-Resonance Thermally Activated Delayed Fluorescence Emitter Design for Organic Light-Emitting Diodes

Thermally Activated Delayed Fluorescenc: Thermally Activated Delayed Fluorescence Materials for Displays and Photodynamic Theory

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

Highly efficient green & red narrowband emissive organic light-emitting diodes employing multi-resonant thermally activated delayed fluorescence emitters (dataset)

Cite this

Highly efficient green and red narrowband emissive organic light-emitting diodes employing multi-resonant thermally activated delayed fluorescence emitters

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Projects

Eli Zysman-colman SRF: New Frontiers in Multi-Resonance Thermally Activated Delayed Fluorescence Emitter Design for Organic Light-Emitting Diodes

Thermally Activated Delayed Fluorescenc: Thermally Activated Delayed Fluorescence Materials for Displays and Photodynamic Theory

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

Datasets

Highly efficient green & red narrowband emissive organic light-emitting diodes employing multi-resonant thermally activated delayed fluorescence emitters (dataset)

Cite this