High efficiency, high color rendering index white organic light-emitting diodes based on thermally activated delayed fluorescence materials

Zhiyi Li; Bowen Li; Xiaofang Wei; Jianjun Liu; Ruifang Wang; Xiaoxiao Hu; Guanhao Liu; Honglei Gao; Yong Zhang; Chun-Sing Lee; Pengfei Wang; Ying Wang

doi:10.1063/1.5139481

High efficiency, high color rendering index white organic light-emitting diodes based on thermally activated delayed fluorescence materials

Zhiyi Li
, Bowen Li
, Xiaofang Wei
, Jianjun Liu
, Ruifang Wang
, Xiaoxiao Hu
, Guanhao Liu
, Honglei Gao
, Yong Zhang^*
, Chun-Sing Lee
, Pengfei Wang
, Ying Wang^*

^*Corresponding author for this work

Centre of Super-Diamond and Advanced Films

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

15 Citations (Scopus)

69 Downloads (CityUHK Scholars)

Abstract

High efficiency white organic light-emitting diodes (WOLEDs) with simple device architecture are desirable for next-generation light sources. However, it is still challenging in the construction of high-performance WOLEDs with a simple device structure. Based on a thermally activated delayed fluorescence (TADF) blue emitter 2SPAc-MPM and a TADF yellow emitter TXO-TPA, high performance two-color WOLEDs with simple device architecture are demonstrated. Benefiting from efficient energy transfer and wide coverage over the visible spectrum, optimized WOLED devices that have a single emitting layer (s-EML) provide a maximum color rendering index (CRI) and maximum external quantum efficiency (EQE) of 78.1 and 21.8%, respectively. More importantly, with multiple emitting layers (m-EMLs), a maximum EQE of 14.5% and a high CRI of 90.7 can be achieved. These results are among the best for the two-color WOLEDs with two TADF emitters.

Original language	English
Article number	263302
Journal	Applied Physics Letters
Volume	115
Issue number	26
Online published	26 Dec 2019
DOIs	https://doi.org/10.1063/1.5139481
Publication status	Published - Dec 2019

Publisher's Copyright Statement

COPYRIGHT TERMS OF DEPOSITED FINAL PUBLISHED VERSION FILE: This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Zhiyi Li, Bowen Li, Xiaofang Wei, Jianjun Liu, Ruifang Wang, Xiaoxiao Hu, Guanhao Liu, Honglei Gao, Yong Zhang, Chun-Sing Lee, Pengfei Wang, and Ying Wang , "High efficiency, high color rendering index white organic light-emitting diodes based on thermally activated delayed fluorescence materials", Appl. Phys. Lett. 115, 263302 (2019) and may be found at https://doi.org/10.1063/1.5139481.

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@article{bf61699690e74c138c396847dffc396b,

title = "High efficiency, high color rendering index white organic light-emitting diodes based on thermally activated delayed fluorescence materials",

abstract = "High efficiency white organic light-emitting diodes (WOLEDs) with simple device architecture are desirable for next-generation light sources. However, it is still challenging in the construction of high-performance WOLEDs with a simple device structure. Based on a thermally activated delayed fluorescence (TADF) blue emitter 2SPAc-MPM and a TADF yellow emitter TXO-TPA, high performance two-color WOLEDs with simple device architecture are demonstrated. Benefiting from efficient energy transfer and wide coverage over the visible spectrum, optimized WOLED devices that have a single emitting layer (s-EML) provide a maximum color rendering index (CRI) and maximum external quantum efficiency (EQE) of 78.1 and 21.8\%, respectively. More importantly, with multiple emitting layers (m-EMLs), a maximum EQE of 14.5\% and a high CRI of 90.7 can be achieved. These results are among the best for the two-color WOLEDs with two TADF emitters.",

author = "Zhiyi Li and Bowen Li and Xiaofang Wei and Jianjun Liu and Ruifang Wang and Xiaoxiao Hu and Guanhao Liu and Honglei Gao and Yong Zhang and Chun-Sing Lee and Pengfei Wang and Ying Wang",

year = "2019",

month = dec,

doi = "10.1063/1.5139481",

language = "English",

volume = "115",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics",

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TY - JOUR

T1 - High efficiency, high color rendering index white organic light-emitting diodes based on thermally activated delayed fluorescence materials

AU - Li, Zhiyi

AU - Li, Bowen

AU - Wei, Xiaofang

AU - Liu, Jianjun

AU - Wang, Ruifang

AU - Hu, Xiaoxiao

AU - Liu, Guanhao

AU - Gao, Honglei

AU - Zhang, Yong

AU - Lee, Chun-Sing

AU - Wang, Pengfei

AU - Wang, Ying

PY - 2019/12

Y1 - 2019/12

N2 - High efficiency white organic light-emitting diodes (WOLEDs) with simple device architecture are desirable for next-generation light sources. However, it is still challenging in the construction of high-performance WOLEDs with a simple device structure. Based on a thermally activated delayed fluorescence (TADF) blue emitter 2SPAc-MPM and a TADF yellow emitter TXO-TPA, high performance two-color WOLEDs with simple device architecture are demonstrated. Benefiting from efficient energy transfer and wide coverage over the visible spectrum, optimized WOLED devices that have a single emitting layer (s-EML) provide a maximum color rendering index (CRI) and maximum external quantum efficiency (EQE) of 78.1 and 21.8%, respectively. More importantly, with multiple emitting layers (m-EMLs), a maximum EQE of 14.5% and a high CRI of 90.7 can be achieved. These results are among the best for the two-color WOLEDs with two TADF emitters.

AB - High efficiency white organic light-emitting diodes (WOLEDs) with simple device architecture are desirable for next-generation light sources. However, it is still challenging in the construction of high-performance WOLEDs with a simple device structure. Based on a thermally activated delayed fluorescence (TADF) blue emitter 2SPAc-MPM and a TADF yellow emitter TXO-TPA, high performance two-color WOLEDs with simple device architecture are demonstrated. Benefiting from efficient energy transfer and wide coverage over the visible spectrum, optimized WOLED devices that have a single emitting layer (s-EML) provide a maximum color rendering index (CRI) and maximum external quantum efficiency (EQE) of 78.1 and 21.8%, respectively. More importantly, with multiple emitting layers (m-EMLs), a maximum EQE of 14.5% and a high CRI of 90.7 can be achieved. These results are among the best for the two-color WOLEDs with two TADF emitters.

UR - https://www.scopus.com/pages/publications/85077514518

UR - https://www.scopus.com/pages/publications/85077514518#tab=impact

U2 - 10.1063/1.5139481

DO - 10.1063/1.5139481

M3 - RGC 21 - Publication in refereed journal

SN - 0003-6951

VL - 115

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 26

M1 - 263302

ER -

High efficiency, high color rendering index white organic light-emitting diodes based on thermally activated delayed fluorescence materials

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