Efficient sky-blue organic light-emitting diodes using a highly horizontally oriented thermally activated delayed fluorescence emitter

Zhen Zhang; Ettore Crovini; Paloma Lays dos Santos; Bilal A. Naqvi; David Bradford Cordes; Alexandra Martha Zoya Slawin; Prakhar Sahay; Wolfgang Brütting; Ifor David William Samuel; Stefan Bräse; Eli Zysman-Colman

doi:10.1002/adom.202001354

Efficient sky-blue organic light-emitting diodes using a highly horizontally oriented thermally activated delayed fluorescence emitter

Zhen Zhang, Ettore Crovini, Paloma Lays dos Santos, Bilal A. Naqvi, David Bradford Cordes, Alexandra Martha Zoya Slawin, Prakhar Sahay, Wolfgang Brütting, Ifor David William Samuel, Stefan Bräse, Eli Zysman-Colman

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

Abstract

Organic thermally activated delayed fluorescent (TADF) materials can harvest 100% of the electrically generated excitons as a result of their small singlet-triplet energy difference. However, maximizing the External Quantum Efficiency (EQE) of a device also requires enhancing the light-outcoupling efficiency. In this work, we present a new Acceptor-Donor-Acceptor (ADA) emitter employing an indolocarbazole donor and diphenyltriazine acceptors that shows nearly-completely horizontal orientation regardless of the host matrix, leading to a sky-blue OLED (λ_EL=483nm, CIE coordinates of 0.17, 0.32) with EQE_MAX of 22.1%, a maximum luminance of 7800 cd/m²and blue emission.

Original language	English
Article number	2001354
Number of pages	8
Journal	Advanced Optical Materials
Volume	8
Issue number	23
Early online date	23 Oct 2020
DOIs	https://doi.org/10.1002/adom.202001354
Publication status	Published - 3 Dec 2020

Keywords

TADF emitters
Horizontal orientation
Outcoupling effect
Indolocarbazole
Triazine
Acceptor-donor-acceptor
Blue emitters
OLEDs

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10.1002/adom.202001354Licence: CC BY

Zhang-2020-Efficient-sky-blue-ADOM-2001354-CCBY
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.
Final published version, 1.36 MBLicence: CC BY

H2020 - ITN ELI ZYSMAN-COLMAN: H2020 MSCA ITN TADFlife
Zysman-Colman, E. (PI)
European Commission
1/10/18 → 30/09/22
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
TADF Emitters for OLEDs - Ifor Samuel: TADF Emitters for OLEDs
Samuel, I. D. W. (PI)
EPSRC
1/03/17 → 28/02/20
Project: Standard

Efficient Sky-Blue Organic Light-emitting Diodes Using a Highly Horizontally Oriented Thermally Activated Delayed Fluorescence Emitter (dataset)
Zhang, Z. (Creator), Crovini, E. (Creator), dos Santos, P. L. (Creator), Naqvi, B. A. (Creator), Cordes, D. B. (Creator), Slawin, A. M. Z. (Creator), Sahay, P. (Creator), Brutting, W. (Creator), Samuel, I. D. W. (Creator), Brase, S. (Creator) & Zysman-Colman, E. (Creator), University of St Andrews, 21 Dec 2021
DOI: 10.17630/fcb16565-94ec-449a-8749-94e70290d090
Dataset

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Cite this

Zhang, Z., Crovini, E., dos Santos, P. L., Naqvi, B. A., Cordes, D. B., Slawin, A. M. Z., Sahay, P., Brütting, W., Samuel, I. D. W., Bräse, S., & Zysman-Colman, E. (2020). Efficient sky-blue organic light-emitting diodes using a highly horizontally oriented thermally activated delayed fluorescence emitter. Advanced Optical Materials, 8(23), Article 2001354. https://doi.org/10.1002/adom.202001354

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title = "Efficient sky-blue organic light-emitting diodes using a highly horizontally oriented thermally activated delayed fluorescence emitter",

abstract = "Organic thermally activated delayed fluorescent (TADF) materials can harvest 100% of the electrically generated excitons as a result of their small singlet-triplet energy difference. However, maximizing the External Quantum Efficiency (EQE) of a device also requires enhancing the light-outcoupling efficiency. In this work, we present a new Acceptor-Donor-Acceptor (ADA) emitter employing an indolocarbazole donor and diphenyltriazine acceptors that shows nearly-completely horizontal orientation regardless of the host matrix, leading to a sky-blue OLED (λEL=483nm, CIE coordinates of 0.17, 0.32) with EQEMAX of 22.1%, a maximum luminance of 7800 cd/m2 and blue emission.",

keywords = "TADF emitters, Horizontal orientation, Outcoupling effect, Indolocarbazole, Triazine, Acceptor-donor-acceptor, Blue emitters, OLEDs",

author = "Zhen Zhang and Ettore Crovini and {dos Santos}, {Paloma Lays} and Naqvi, {Bilal A.} and Cordes, {David Bradford} and Slawin, {Alexandra Martha Zoya} and Prakhar Sahay and Wolfgang Br{\"u}tting and Samuel, {Ifor David William} and Stefan Br{\"a}se and Eli Zysman-Colman",

note = "Funding: Deutsche Forschungsgemeinschaft (Grant Number(s): SFB1176), Engineering and Physical Sciences Research Council (Grant Number(s): EP/P010482/1), China Scholarship Council (Grant Number(s): 201606890009), H2020 Marie Sk{\l}odowska-Curie Actions (Grant Number(s): 812872).",

year = "2020",

month = dec,

day = "3",

doi = "10.1002/adom.202001354",

language = "English",

volume = "8",

journal = "Advanced Optical Materials",

issn = "2195-1071",

publisher = "John Wiley & Sons, Ltd",

number = "23",

}

Zhang, Z, Crovini, E, dos Santos, PL, Naqvi, BA, Cordes, DB , Slawin, AMZ, Sahay, P, Brütting, W, Samuel, IDW, Bräse, S & Zysman-Colman, E 2020, 'Efficient sky-blue organic light-emitting diodes using a highly horizontally oriented thermally activated delayed fluorescence emitter', Advanced Optical Materials, vol. 8, no. 23, 2001354. https://doi.org/10.1002/adom.202001354

TY - JOUR

T1 - Efficient sky-blue organic light-emitting diodes using a highly horizontally oriented thermally activated delayed fluorescence emitter

AU - Zhang, Zhen

AU - Crovini, Ettore

AU - dos Santos, Paloma Lays

AU - Naqvi, Bilal A.

AU - Cordes, David Bradford

AU - Slawin, Alexandra Martha Zoya

AU - Sahay, Prakhar

AU - Brütting, Wolfgang

AU - Samuel, Ifor David William

AU - Bräse, Stefan

AU - Zysman-Colman, Eli

N1 - Funding: Deutsche Forschungsgemeinschaft (Grant Number(s): SFB1176), Engineering and Physical Sciences Research Council (Grant Number(s): EP/P010482/1), China Scholarship Council (Grant Number(s): 201606890009), H2020 Marie Skłodowska-Curie Actions (Grant Number(s): 812872).

PY - 2020/12/3

Y1 - 2020/12/3

N2 - Organic thermally activated delayed fluorescent (TADF) materials can harvest 100% of the electrically generated excitons as a result of their small singlet-triplet energy difference. However, maximizing the External Quantum Efficiency (EQE) of a device also requires enhancing the light-outcoupling efficiency. In this work, we present a new Acceptor-Donor-Acceptor (ADA) emitter employing an indolocarbazole donor and diphenyltriazine acceptors that shows nearly-completely horizontal orientation regardless of the host matrix, leading to a sky-blue OLED (λEL=483nm, CIE coordinates of 0.17, 0.32) with EQEMAX of 22.1%, a maximum luminance of 7800 cd/m2 and blue emission.

AB - Organic thermally activated delayed fluorescent (TADF) materials can harvest 100% of the electrically generated excitons as a result of their small singlet-triplet energy difference. However, maximizing the External Quantum Efficiency (EQE) of a device also requires enhancing the light-outcoupling efficiency. In this work, we present a new Acceptor-Donor-Acceptor (ADA) emitter employing an indolocarbazole donor and diphenyltriazine acceptors that shows nearly-completely horizontal orientation regardless of the host matrix, leading to a sky-blue OLED (λEL=483nm, CIE coordinates of 0.17, 0.32) with EQEMAX of 22.1%, a maximum luminance of 7800 cd/m2 and blue emission.

KW - TADF emitters

KW - Horizontal orientation

KW - Outcoupling effect

KW - Indolocarbazole

KW - Triazine

KW - Acceptor-donor-acceptor

KW - Blue emitters

KW - OLEDs

U2 - 10.1002/adom.202001354

DO - 10.1002/adom.202001354

M3 - Article

SN - 2195-1071

VL - 8

JO - Advanced Optical Materials

JF - Advanced Optical Materials

IS - 23

M1 - 2001354

ER -

Efficient sky-blue organic light-emitting diodes using a highly horizontally oriented thermally activated delayed fluorescence emitter

Abstract

Keywords

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Projects

H2020 - ITN ELI ZYSMAN-COLMAN: H2020 MSCA ITN TADFlife

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

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

Datasets

Efficient Sky-Blue Organic Light-emitting Diodes Using a Highly Horizontally Oriented Thermally Activated Delayed Fluorescence Emitter (dataset)

Cite this