Red/Near-Infrared Thermally Activated Delayed Fluorescence OLEDs with Near 100 % Internal Quantum Efficiency

Jia Xiong Chen; Wen Wen Tao; Wen Cheng Chen; Ya Fang Xiao; Kai Wang; Chen Cao; Jia Yu; Shengliang Li; Feng Xia Geng; Chihaya Adachi; Chun Sing Lee; Xiao Hong Zhang

doi:10.1002/anie.201906575

Red/Near-Infrared Thermally Activated Delayed Fluorescence OLEDs with Near 100 % Internal Quantum Efficiency

Jia Xiong Chen, Wen Wen Tao, Wen Cheng Chen, Ya Fang Xiao, Kai Wang, Chen Cao, Jia Yu, Shengliang Li, Feng Xia Geng, Chihaya Adachi, Chun Sing Lee, Xiao Hong Zhang

Applied Chemistry

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

237 Citations (Scopus)

Abstract

Developing red thermally activated delayed fluorescence (TADF) emitters, attainable for both high-efficient red organic light-emitting diodes (OLEDs) and non-doped deep red/near-infrared (NIR) OLEDs, is challenging. Now, two red emitters, BPPZ-PXZ and mDPBPZ-PXZ, with twisted donor–acceptor structures were designed and synthesized to study molecular design strategies of high-efficiency red TADF emitters. BPPZ-PXZ employs the strictest molecular restrictions to suppress energy loss and realizes red emission with a photoluminescence quantum yield (Φ_PL) of 100±0.8 % and external quantum efficiency (EQE) of 25.2 % in a doped OLED. Its non-doped OLED has an EQE of 2.5 % owing to unavoidable intermolecular π–π interactions. mDPBPZ-PXZ releases two pyridine substituents from its fused acceptor moiety. Although mDPBPZ-PXZ realizes a lower EQE of 21.7 % in the doped OLED, its non-doped device shows a superior EQE of 5.2 % with a deep red/NIR emission at peak of 680 nm.

Original language	English
Pages (from-to)	14660-14665
Number of pages	6
Journal	Angewandte Chemie - International Edition
Volume	58
Issue number	41
DOIs	https://doi.org/10.1002/anie.201906575
Publication status	Published - Oct 7 2019

All Science Journal Classification (ASJC) codes

Catalysis
Chemistry(all)

Access to Document

10.1002/anie.201906575

Cite this

@article{1a81dc34d5f54528a84d8587e18a33dd,

title = "Red/Near-Infrared Thermally Activated Delayed Fluorescence OLEDs with Near 100 % Internal Quantum Efficiency",

abstract = "Developing red thermally activated delayed fluorescence (TADF) emitters, attainable for both high-efficient red organic light-emitting diodes (OLEDs) and non-doped deep red/near-infrared (NIR) OLEDs, is challenging. Now, two red emitters, BPPZ-PXZ and mDPBPZ-PXZ, with twisted donor–acceptor structures were designed and synthesized to study molecular design strategies of high-efficiency red TADF emitters. BPPZ-PXZ employs the strictest molecular restrictions to suppress energy loss and realizes red emission with a photoluminescence quantum yield (ΦPL) of 100±0.8 % and external quantum efficiency (EQE) of 25.2 % in a doped OLED. Its non-doped OLED has an EQE of 2.5 % owing to unavoidable intermolecular π–π interactions. mDPBPZ-PXZ releases two pyridine substituents from its fused acceptor moiety. Although mDPBPZ-PXZ realizes a lower EQE of 21.7 % in the doped OLED, its non-doped device shows a superior EQE of 5.2 % with a deep red/NIR emission at peak of 680 nm.",

author = "Chen, {Jia Xiong} and Tao, {Wen Wen} and Chen, {Wen Cheng} and Xiao, {Ya Fang} and Kai Wang and Chen Cao and Jia Yu and Shengliang Li and Geng, {Feng Xia} and Chihaya Adachi and Lee, {Chun Sing} and Zhang, {Xiao Hong}",

note = "Funding Information: This work was supported by the National Key Research & Development Program of China (Grant No. 2016YFB0401002), the National Natural Science Foundation of China (Grant No. 51533005, 51821002, 51773029), the China Postdoctoral Science Foundation (Grant No. 2018M640517, 2018M642307), Collaborative Innovation Center of Suzhou Nano Science & Technology, the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD), the 111 Project, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices. Publisher Copyright: {\textcopyright} 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim",

year = "2019",

month = oct,

day = "7",

doi = "10.1002/anie.201906575",

language = "English",

volume = "58",

pages = "14660--14665",

journal = "Angewandte Chemie - International Edition",

issn = "1433-7851",

publisher = "John Wiley and Sons Ltd",

number = "41",

}

TY - JOUR

T1 - Red/Near-Infrared Thermally Activated Delayed Fluorescence OLEDs with Near 100 % Internal Quantum Efficiency

AU - Chen, Jia Xiong

AU - Tao, Wen Wen

AU - Chen, Wen Cheng

AU - Xiao, Ya Fang

AU - Wang, Kai

AU - Cao, Chen

AU - Yu, Jia

AU - Li, Shengliang

AU - Geng, Feng Xia

AU - Adachi, Chihaya

AU - Lee, Chun Sing

AU - Zhang, Xiao Hong

N1 - Funding Information: This work was supported by the National Key Research & Development Program of China (Grant No. 2016YFB0401002), the National Natural Science Foundation of China (Grant No. 51533005, 51821002, 51773029), the China Postdoctoral Science Foundation (Grant No. 2018M640517, 2018M642307), Collaborative Innovation Center of Suzhou Nano Science & Technology, the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD), the 111 Project, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices. Publisher Copyright: © 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim

PY - 2019/10/7

Y1 - 2019/10/7

N2 - Developing red thermally activated delayed fluorescence (TADF) emitters, attainable for both high-efficient red organic light-emitting diodes (OLEDs) and non-doped deep red/near-infrared (NIR) OLEDs, is challenging. Now, two red emitters, BPPZ-PXZ and mDPBPZ-PXZ, with twisted donor–acceptor structures were designed and synthesized to study molecular design strategies of high-efficiency red TADF emitters. BPPZ-PXZ employs the strictest molecular restrictions to suppress energy loss and realizes red emission with a photoluminescence quantum yield (ΦPL) of 100±0.8 % and external quantum efficiency (EQE) of 25.2 % in a doped OLED. Its non-doped OLED has an EQE of 2.5 % owing to unavoidable intermolecular π–π interactions. mDPBPZ-PXZ releases two pyridine substituents from its fused acceptor moiety. Although mDPBPZ-PXZ realizes a lower EQE of 21.7 % in the doped OLED, its non-doped device shows a superior EQE of 5.2 % with a deep red/NIR emission at peak of 680 nm.

AB - Developing red thermally activated delayed fluorescence (TADF) emitters, attainable for both high-efficient red organic light-emitting diodes (OLEDs) and non-doped deep red/near-infrared (NIR) OLEDs, is challenging. Now, two red emitters, BPPZ-PXZ and mDPBPZ-PXZ, with twisted donor–acceptor structures were designed and synthesized to study molecular design strategies of high-efficiency red TADF emitters. BPPZ-PXZ employs the strictest molecular restrictions to suppress energy loss and realizes red emission with a photoluminescence quantum yield (ΦPL) of 100±0.8 % and external quantum efficiency (EQE) of 25.2 % in a doped OLED. Its non-doped OLED has an EQE of 2.5 % owing to unavoidable intermolecular π–π interactions. mDPBPZ-PXZ releases two pyridine substituents from its fused acceptor moiety. Although mDPBPZ-PXZ realizes a lower EQE of 21.7 % in the doped OLED, its non-doped device shows a superior EQE of 5.2 % with a deep red/NIR emission at peak of 680 nm.

UR - http://www.scopus.com/inward/record.url?scp=85070751736&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85070751736&partnerID=8YFLogxK

U2 - 10.1002/anie.201906575

DO - 10.1002/anie.201906575

M3 - Article

C2 - 31313424

AN - SCOPUS:85070751736

SN - 1433-7851

VL - 58

SP - 14660

EP - 14665

JO - Angewandte Chemie - International Edition

JF - Angewandte Chemie - International Edition

IS - 41

ER -

Red/Near-Infrared Thermally Activated Delayed Fluorescence OLEDs with Near 100 % Internal Quantum Efficiency

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this