Thermally activated delayed fluorescence emitters with intramolecular proton transfer for high luminance solution-processed organic light-emitting diodes

Abhishek Gupta; Wenbo Li; Arvydas Ruseckas; Cheng Lian; Cameron Lewis Carpenter-Warren; David Bradford Cordes; Alexandra Martha Zoya Slawin; Denis Jacquemin; Ifor David William Samuel; Eli Zysman-Colman

doi:10.1021/acsami.1c02248

Thermally activated delayed fluorescence emitters with intramolecular proton transfer for high luminance solution-processed organic light-emitting diodes

Abhishek Gupta, Wenbo Li, Arvydas Ruseckas, Cheng Lian, Cameron Lewis Carpenter-Warren, David Bradford Cordes, Alexandra Martha Zoya Slawin, Denis Jacquemin, Ifor David William Samuel, Eli Zysman-Colman

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

Abstract

We report an organic emitter containing a β-triketone electron acceptor core and
phenoxazine as the electron donors (TPXZBM) for solution-processed organic light-emitting diodes (OLEDs). The resulting molecule is very unusual because it shows both thermally activated delayed fluorescence (TADF) and intramolecular proton transfer. We compare its performance with the previously reported diketone analogue PXZPDO. Solution-processed OLEDs of PXZPDO and TPXZBM show maximum external quantum efficiencies of 20.1% and 12.7%, respectively. The results obtained for the solution-processed PXZPDO-based device are as good as the previously reported evaporated device. At a very high luminance of 10,000 cd/m2 the efficiency of the OLEDs was 10.6% for PXZPDO and 4.7% for TPXZBM, demonstrating relatively low efficiency roll-off for TADF materials. The low efficiency roll-off was rationalized on the basis of the short delayed lifetimes of 1.35 μs for PXZPDO and 1.44 μs for TPXZBM. Our results suggest that intramolecular proton transfer may be useful for the design of OLED materials with low efficiency roll-off.

Original language	English
Journal	ACS Applied Materials & Interfaces
Volume	Articles ASAP
Early online date	30 Mar 2021
DOIs	https://doi.org/10.1021/acsami.1c02248
Publication status	E-pub ahead of print - 30 Mar 2021

Keywords

ESIPT
Proton transfer
TADF
OLEDs
Roll-off efficiency
Luminescence

Access to Document

10.1021/acsami.1c02248

Gupta_2021_ACSAMI_Fluorescence_AAM
Copyright © 2021 American Chemical Society. This work has been made available online in accordance with publisher policies or with permission. Permission for further reuse of this content should be sought from the publisher or the rights holder. This is the author created accepted manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1021/acsami.1c02248
Accepted author manuscript, 3.07 MB

Thermally Activated Delayed Fluorescenc: Thermally Activated Delayed Fluorescence Materials for Displays and Photodynamic Theory
Samuel, I. D. W. (PI)
The Royal Society
1/02/18 → 31/01/20
Project: Fellowship
TADF Emitters for OLEDs - Eli Zysman: TADF Emitters for OLEDs
Zysman-Colman, E. (PI)
EPSRC
1/03/17 → 31/03/21
Project: Standard
Equipment Account: Characterisation and Manipulation of Advanced Functional Materials and their Interfaces at the Nanoscale
Samuel, I. D. W. (PI)
EPSRC
1/10/13 → 30/09/23
Project: Standard

CCDC 2033769: Experimental Crystal Structure Determination
Gupta, A. K. (Creator), Li, W. (Creator), Ruseckas, A. (Creator), Lian, C. (Creator), Carpenter-Warren, C. L. (Creator), Cordes, D. B. (Creator), Slawin, A. M. Z. (Creator), Jacquemin, D. (Creator), Samuel, I. D. W. (Creator) & Zysman-Colman, E. (Creator), Cambridge Crystallographic Data Centre, 2021
DOI: 10.5517/ccdc.csd.cc2689g8
Dataset
Thermally Activated Delayed Fluorescence Emitters with Intramolecular Proton Transfer for High Luminance Solution-Processed Organic LightEmitting Diodes (dataset)
Gupta, A. K. (Creator), Li, W. (Creator), Ruseckas, A. (Creator), Lian, C. (Creator), Carpenter-Warren, C. L. (Creator), Cordes, D. B. (Creator), Slawin, A. M. Z. (Creator), Jacquemin, D. (Creator), Samuel, I. D. W. (Creator) & Zysman-Colman, E. (Creator), University of St Andrews, 21 Dec 2021
DOI: 10.17630/fdcb6db3-bc50-4e6e-801e-abe0129a2e2d
Dataset

File

Cite this

Gupta, A., Li, W., Ruseckas, A., Lian, C., Carpenter-Warren, C. L., Cordes, D. B., Slawin, A. M. Z., Jacquemin, D., Samuel, I. D. W., & Zysman-Colman, E. (2021). Thermally activated delayed fluorescence emitters with intramolecular proton transfer for high luminance solution-processed organic light-emitting diodes. ACS Applied Materials & Interfaces, Articles ASAP. Advance online publication. https://doi.org/10.1021/acsami.1c02248

@article{25ef18d9b7494acf85daeaaff831d60c,

title = "Thermally activated delayed fluorescence emitters with intramolecular proton transfer for high luminance solution-processed organic light-emitting diodes",

abstract = "We report an organic emitter containing a β-triketone electron acceptor core and phenoxazine as the electron donors (TPXZBM) for solution-processed organic light-emitting diodes (OLEDs). The resulting molecule is very unusual because it shows both thermally activated delayed fluorescence (TADF) and intramolecular proton transfer. We compare its performance with the previously reported diketone analogue PXZPDO. Solution-processed OLEDs of PXZPDO and TPXZBM show maximum external quantum efficiencies of 20.1% and 12.7%, respectively. The results obtained for the solution-processed PXZPDO-based device are as good as the previously reported evaporated device. At a very high luminance of 10,000 cd/m2 the efficiency of the OLEDs was 10.6% for PXZPDO and 4.7% for TPXZBM, demonstrating relatively low efficiency roll-off for TADF materials. The low efficiency roll-off was rationalized on the basis of the short delayed lifetimes of 1.35 μs for PXZPDO and 1.44 μs for TPXZBM. Our results suggest that intramolecular proton transfer may be useful for the design of OLED materials with low efficiency roll-off.",

keywords = "ESIPT, Proton transfer, TADF, OLEDs, Roll-off efficiency, Luminescence",

author = "Abhishek Gupta and Wenbo Li and Arvydas Ruseckas and Cheng Lian and Carpenter-Warren, {Cameron Lewis} and Cordes, {David Bradford} and Slawin, {Alexandra Martha Zoya} and Denis Jacquemin and Samuel, {Ifor David William} and Eli Zysman-Colman",

note = "AKG is grateful to the Royal Society for Newton International Fellowship NF171163. We acknowledge support from the Engineering and Physical Sciences Research Council of the UK (grants EP/P010482/1 and EP/L017008/1). We thank the EPSRC UK National Mass Spectrometry Facility at Swansea University for analytical services. We thank Umicore for providing palladium (II) acetate.",

year = "2021",

month = mar,

day = "30",

doi = "10.1021/acsami.1c02248",

language = "English",

volume = "Articles ASAP",

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Gupta, A, Li, W, Ruseckas, A, Lian, C, Carpenter-Warren, CL, Cordes, DB , Slawin, AMZ, Jacquemin, D, Samuel, IDW & Zysman-Colman, E 2021, 'Thermally activated delayed fluorescence emitters with intramolecular proton transfer for high luminance solution-processed organic light-emitting diodes', ACS Applied Materials & Interfaces, vol. Articles ASAP. https://doi.org/10.1021/acsami.1c02248

TY - JOUR

T1 - Thermally activated delayed fluorescence emitters with intramolecular proton transfer for high luminance solution-processed organic light-emitting diodes

AU - Gupta, Abhishek

AU - Li, Wenbo

AU - Ruseckas, Arvydas

AU - Lian, Cheng

AU - Carpenter-Warren, Cameron Lewis

AU - Cordes, David Bradford

AU - Slawin, Alexandra Martha Zoya

AU - Jacquemin, Denis

AU - Samuel, Ifor David William

AU - Zysman-Colman, Eli

N1 - AKG is grateful to the Royal Society for Newton International Fellowship NF171163. We acknowledge support from the Engineering and Physical Sciences Research Council of the UK (grants EP/P010482/1 and EP/L017008/1). We thank the EPSRC UK National Mass Spectrometry Facility at Swansea University for analytical services. We thank Umicore for providing palladium (II) acetate.

PY - 2021/3/30

Y1 - 2021/3/30

N2 - We report an organic emitter containing a β-triketone electron acceptor core and phenoxazine as the electron donors (TPXZBM) for solution-processed organic light-emitting diodes (OLEDs). The resulting molecule is very unusual because it shows both thermally activated delayed fluorescence (TADF) and intramolecular proton transfer. We compare its performance with the previously reported diketone analogue PXZPDO. Solution-processed OLEDs of PXZPDO and TPXZBM show maximum external quantum efficiencies of 20.1% and 12.7%, respectively. The results obtained for the solution-processed PXZPDO-based device are as good as the previously reported evaporated device. At a very high luminance of 10,000 cd/m2 the efficiency of the OLEDs was 10.6% for PXZPDO and 4.7% for TPXZBM, demonstrating relatively low efficiency roll-off for TADF materials. The low efficiency roll-off was rationalized on the basis of the short delayed lifetimes of 1.35 μs for PXZPDO and 1.44 μs for TPXZBM. Our results suggest that intramolecular proton transfer may be useful for the design of OLED materials with low efficiency roll-off.

AB - We report an organic emitter containing a β-triketone electron acceptor core and phenoxazine as the electron donors (TPXZBM) for solution-processed organic light-emitting diodes (OLEDs). The resulting molecule is very unusual because it shows both thermally activated delayed fluorescence (TADF) and intramolecular proton transfer. We compare its performance with the previously reported diketone analogue PXZPDO. Solution-processed OLEDs of PXZPDO and TPXZBM show maximum external quantum efficiencies of 20.1% and 12.7%, respectively. The results obtained for the solution-processed PXZPDO-based device are as good as the previously reported evaporated device. At a very high luminance of 10,000 cd/m2 the efficiency of the OLEDs was 10.6% for PXZPDO and 4.7% for TPXZBM, demonstrating relatively low efficiency roll-off for TADF materials. The low efficiency roll-off was rationalized on the basis of the short delayed lifetimes of 1.35 μs for PXZPDO and 1.44 μs for TPXZBM. Our results suggest that intramolecular proton transfer may be useful for the design of OLED materials with low efficiency roll-off.

KW - ESIPT

KW - Proton transfer

KW - TADF

KW - OLEDs

KW - Roll-off efficiency

KW - Luminescence

U2 - 10.1021/acsami.1c02248

DO - 10.1021/acsami.1c02248

M3 - Article

SN - 1944-8244

VL - Articles ASAP

JO - ACS Applied Materials & Interfaces

JF - ACS Applied Materials & Interfaces

ER -

Thermally activated delayed fluorescence emitters with intramolecular proton transfer for high luminance solution-processed organic light-emitting diodes

Abstract

Keywords

Access to Document

Fingerprint

Projects

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

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

Equipment Account: Characterisation and Manipulation of Advanced Functional Materials and their Interfaces at the Nanoscale

Datasets

CCDC 2033769: Experimental Crystal Structure Determination

Thermally Activated Delayed Fluorescence Emitters with Intramolecular Proton Transfer for High Luminance Solution-Processed Organic LightEmitting Diodes (dataset)

Cite this