Mesogenic groups control the emitter orientation in multi-resonance TADF emitter films

Dongyang Chen; Francisco Tenopala‐Carmona; Julius A. Knöller; Andreas Mischok; David Hall; Subeesh Madayanad Suresh; Tomas Matulaitis; Yoann Olivier; Pierre Nacke; Frank Gießelmann; Sabine Laschat; Malte C. Gather; Eli Zysman‐Colman

doi:10.1002/anie.202218911

Mesogenic groups control the emitter orientation in multi-resonance TADF emitter films

Dongyang Chen, Francisco Tenopala‐Carmona, Julius A. Knöller, Andreas Mischok, David Hall, Subeesh Madayanad Suresh, Tomas Matulaitis, Yoann Olivier, Pierre Nacke, Frank Gießelmann, Sabine Laschat^*, Malte C. Gather^*, Eli Zysman‐Colman^*

^*Corresponding author for this work

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

Abstract

The use of thermally activated delayed fluorescence (TADF) emitters and emitters that show preferential horizontal orientation of their transition dipole moment (TDM) are two emerging strategies to enhance the efficiency of OLEDs. We present the first example of a liquid crystalline multi-resonance TADF (MR-TADF) emitter, DiKTa-LC. The compound possesses a nematic liquid crystalline phase between 80 °C and 110 °C. Importantly, the TDM of the spin-coated film shows preferential horizontal orientation, with an anisotropy factor, a, of 0.28, which is preserved in doped poly(vinylcarbazole) films. Green-emitting (λEL = 492 nm) solution-processed OLEDs based on DiKTa-LC showed an EQEmax of 13.6%. We thus demonstrate for the first time how self-assembly of a liquid crystalline TADF emitter can lead to the so-far elusive control of the orientation of the transition dipole in solution-processed films, which will be of relevance for high-performance solution-processed OLEDs.

Original language	English
Article number	e202218911
Number of pages	12
Journal	Angewandte Chemie International Edition
Volume	62
Issue number	16
Early online date	8 Mar 2023
DOIs	https://doi.org/10.1002/anie.202218911
Publication status	Published - 11 Apr 2023

Keywords

TADF
OLED
Liquid crystal
Transition dipole moment

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Chen-2023-Mesogenic-groups-control-AngewandteChemieIE-2022181911-CCBY
Copyright © 2023 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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TADF DLC OLEDs: MSCA-IF-2020. TADF-DLC-OLEDs: Development of highly efficient solution-processable blue organic light-emitting diodes based on liquid-crystalline thermally activated delayed fluorescent emitter materials
Zysman-Colman, E. (PI)
European Commission Joint Research Centre
30/08/21 → 29/08/23
Project: Standard
Eli Zysman-colman SRF: New Frontiers in Multi-Resonance Thermally Activated Delayed Fluorescence Emitter Design for Organic Light-Emitting Diodes
Zysman-Colman, E. (PI)
The Royal Society
18/01/21 → 18/03/22
Project: Fellowship
H2020 MSCA IF 2018 (Subeesh Suresh): H2020 MSCA IF 2018 (Subeesh Suresh )
Zysman-Colman, E. (PI)
European Commission Joint Research Centre
1/04/19 → 31/03/21
Project: Fellowship

Mesogenic Groups Control the Emitter Orientation in Multi-Resonance TADF Emitter Films (dataset)
Chen, D. (Creator), Tenopala Carmona, F. (Creator), Knöller, J. A. (Creator), Mischok, A. (Creator), Hall, D. L. S. (Creator), Madayanad Suresh, S. (Creator), Matulaitis, T. (Creator), Olivier, Y. (Creator), Nacke, P. (Creator), Gießelmann, F. (Creator), Laschat, S. (Creator), Gather, M. C. (Creator) & Zysman-Colman, E. (Creator), University of St Andrews, 9 Mar 2023
DOI: 10.17630/30e801b6-8f6b-4779-8103-b364e485262d
Dataset

File

Cite this

Chen, D., Tenopala‐Carmona, F., Knöller, J. A., Mischok, A., Hall, D., Madayanad Suresh, S., Matulaitis, T., Olivier, Y., Nacke, P., Gießelmann, F., Laschat, S., Gather, M. C., & Zysman‐Colman, E. (2023). Mesogenic groups control the emitter orientation in multi-resonance TADF emitter films. Angewandte Chemie International Edition, 62(16), Article e202218911. https://doi.org/10.1002/anie.202218911

@article{c2245213460344a19421fc5736552155,

title = "Mesogenic groups control the emitter orientation in multi-resonance TADF emitter films",

abstract = "The use of thermally activated delayed fluorescence (TADF) emitters and emitters that show preferential horizontal orientation of their transition dipole moment (TDM) are two emerging strategies to enhance the efficiency of OLEDs. We present the first example of a liquid crystalline multi-resonance TADF (MR-TADF) emitter, DiKTa-LC. The compound possesses a nematic liquid crystalline phase between 80 °C and 110 °C. Importantly, the TDM of the spin-coated film shows preferential horizontal orientation, with an anisotropy factor, a, of 0.28, which is preserved in doped poly(vinylcarbazole) films. Green-emitting (λEL = 492 nm) solution-processed OLEDs based on DiKTa-LC showed an EQEmax of 13.6%. We thus demonstrate for the first time how self-assembly of a liquid crystalline TADF emitter can lead to the so-far elusive control of the orientation of the transition dipole in solution-processed films, which will be of relevance for high-performance solution-processed OLEDs.",

keywords = "TADF, OLED, Liquid crystal, Transition dipole moment",

author = "Dongyang Chen and Francisco Tenopala‐Carmona and Kn{\"o}ller, {Julius A.} and Andreas Mischok and David Hall and {Madayanad Suresh}, Subeesh and Tomas Matulaitis and Yoann Olivier and Pierre Nacke and Frank Gie{\ss}elmann and Sabine Laschat and Gather, {Malte C.} and Eli Zysman‐Colman",

note = "Funding: Engineering and Physical Sciences Research Council - EP/P010482/1; Leverhulme Trust - RPG-2016-047; Royal Society - SRF\R1\201089; China Scholarship Council - 201603780001; Horizon 2020 Framework Programme - 838885; Fonds De La Recherche Scientifique - FNRS - 2.5020.11; Fonds De La Recherche Scientifique - FNRS - F.4534.21; Horizon 2020 Framework Programme - 101023743.",

year = "2023",

month = apr,

day = "11",

doi = "10.1002/anie.202218911",

language = "English",

volume = "62",

journal = "Angewandte Chemie International Edition",

issn = "1433-7851",

publisher = "John Wiley & Sons, Ltd",

number = "16",

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Chen, D, Tenopala‐Carmona, F, Knöller, JA, Mischok, A, Hall, D, Madayanad Suresh, S, Matulaitis, T, Olivier, Y, Nacke, P, Gießelmann, F, Laschat, S, Gather, MC & Zysman‐Colman, E 2023, 'Mesogenic groups control the emitter orientation in multi-resonance TADF emitter films', Angewandte Chemie International Edition, vol. 62, no. 16, e202218911. https://doi.org/10.1002/anie.202218911

TY - JOUR

T1 - Mesogenic groups control the emitter orientation in multi-resonance TADF emitter films

AU - Chen, Dongyang

AU - Tenopala‐Carmona, Francisco

AU - Knöller, Julius A.

AU - Mischok, Andreas

AU - Hall, David

AU - Madayanad Suresh, Subeesh

AU - Matulaitis, Tomas

AU - Olivier, Yoann

AU - Nacke, Pierre

AU - Gießelmann, Frank

AU - Laschat, Sabine

AU - Gather, Malte C.

AU - Zysman‐Colman, Eli

N1 - Funding: Engineering and Physical Sciences Research Council - EP/P010482/1; Leverhulme Trust - RPG-2016-047; Royal Society - SRF\R1\201089; China Scholarship Council - 201603780001; Horizon 2020 Framework Programme - 838885; Fonds De La Recherche Scientifique - FNRS - 2.5020.11; Fonds De La Recherche Scientifique - FNRS - F.4534.21; Horizon 2020 Framework Programme - 101023743.

PY - 2023/4/11

Y1 - 2023/4/11

N2 - The use of thermally activated delayed fluorescence (TADF) emitters and emitters that show preferential horizontal orientation of their transition dipole moment (TDM) are two emerging strategies to enhance the efficiency of OLEDs. We present the first example of a liquid crystalline multi-resonance TADF (MR-TADF) emitter, DiKTa-LC. The compound possesses a nematic liquid crystalline phase between 80 °C and 110 °C. Importantly, the TDM of the spin-coated film shows preferential horizontal orientation, with an anisotropy factor, a, of 0.28, which is preserved in doped poly(vinylcarbazole) films. Green-emitting (λEL = 492 nm) solution-processed OLEDs based on DiKTa-LC showed an EQEmax of 13.6%. We thus demonstrate for the first time how self-assembly of a liquid crystalline TADF emitter can lead to the so-far elusive control of the orientation of the transition dipole in solution-processed films, which will be of relevance for high-performance solution-processed OLEDs.

AB - The use of thermally activated delayed fluorescence (TADF) emitters and emitters that show preferential horizontal orientation of their transition dipole moment (TDM) are two emerging strategies to enhance the efficiency of OLEDs. We present the first example of a liquid crystalline multi-resonance TADF (MR-TADF) emitter, DiKTa-LC. The compound possesses a nematic liquid crystalline phase between 80 °C and 110 °C. Importantly, the TDM of the spin-coated film shows preferential horizontal orientation, with an anisotropy factor, a, of 0.28, which is preserved in doped poly(vinylcarbazole) films. Green-emitting (λEL = 492 nm) solution-processed OLEDs based on DiKTa-LC showed an EQEmax of 13.6%. We thus demonstrate for the first time how self-assembly of a liquid crystalline TADF emitter can lead to the so-far elusive control of the orientation of the transition dipole in solution-processed films, which will be of relevance for high-performance solution-processed OLEDs.

KW - TADF

KW - OLED

KW - Liquid crystal

KW - Transition dipole moment

U2 - 10.1002/anie.202218911

DO - 10.1002/anie.202218911

M3 - Article

SN - 1433-7851

VL - 62

JO - Angewandte Chemie International Edition

JF - Angewandte Chemie International Edition

IS - 16

M1 - e202218911

ER -

Mesogenic groups control the emitter orientation in multi-resonance TADF emitter films

Abstract

Keywords

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Projects

TADF DLC OLEDs: MSCA-IF-2020. TADF-DLC-OLEDs: Development of highly efficient solution-processable blue organic light-emitting diodes based on liquid-crystalline thermally activated delayed fluorescent emitter materials

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

H2020 MSCA IF 2018 (Subeesh Suresh): H2020 MSCA IF 2018 (Subeesh Suresh )

Datasets

Mesogenic Groups Control the Emitter Orientation in Multi-Resonance TADF Emitter Films (dataset)

Cite this