Highly Efficient Purely Organic Phosphorescence Light‐Emitting Diodes Employing a Donor–Acceptor Skeleton with a Phenoxaselenine Donor

Zijian Chen; Mengke Li; Qing Gu; Xiaomei Peng; Weidong Qiu; Wentao Xie; Denghui Liu; Yihang Jiao; Kunkun Liu; Jiadong Zhou; Shi‐Jian Su

doi:10.1002/advs.202207003

Advanced Science (Apr 2023)

Highly Efficient Purely Organic Phosphorescence Light‐Emitting Diodes Employing a Donor–Acceptor Skeleton with a Phenoxaselenine Donor

Zijian Chen,
Mengke Li,
Qing Gu,
Xiaomei Peng,
Weidong Qiu,
Wentao Xie,
Denghui Liu,
Yihang Jiao,
Kunkun Liu,
Jiadong Zhou,
Shi‐Jian Su

Affiliations

Zijian Chen: State Key Laboratory of Luminescent Materials and Devices and Institute of Polymer Optoelectronic Materials and Devices South China University of Technology Wushan Road 381, Tianhe District Guangzhou Guangdong Province 510640 P. R. China
Mengke Li: State Key Laboratory of Luminescent Materials and Devices and Institute of Polymer Optoelectronic Materials and Devices South China University of Technology Wushan Road 381, Tianhe District Guangzhou Guangdong Province 510640 P. R. China
Qing Gu: State Key Laboratory of Luminescent Materials and Devices and Institute of Polymer Optoelectronic Materials and Devices South China University of Technology Wushan Road 381, Tianhe District Guangzhou Guangdong Province 510640 P. R. China
Xiaomei Peng: State Key Laboratory of Luminescent Materials and Devices and Institute of Polymer Optoelectronic Materials and Devices South China University of Technology Wushan Road 381, Tianhe District Guangzhou Guangdong Province 510640 P. R. China
Weidong Qiu: State Key Laboratory of Luminescent Materials and Devices and Institute of Polymer Optoelectronic Materials and Devices South China University of Technology Wushan Road 381, Tianhe District Guangzhou Guangdong Province 510640 P. R. China
Wentao Xie: State Key Laboratory of Luminescent Materials and Devices and Institute of Polymer Optoelectronic Materials and Devices South China University of Technology Wushan Road 381, Tianhe District Guangzhou Guangdong Province 510640 P. R. China
Denghui Liu: State Key Laboratory of Luminescent Materials and Devices and Institute of Polymer Optoelectronic Materials and Devices South China University of Technology Wushan Road 381, Tianhe District Guangzhou Guangdong Province 510640 P. R. China
Yihang Jiao: State Key Laboratory of Luminescent Materials and Devices and Institute of Polymer Optoelectronic Materials and Devices South China University of Technology Wushan Road 381, Tianhe District Guangzhou Guangdong Province 510640 P. R. China
Kunkun Liu: State Key Laboratory of Luminescent Materials and Devices and Institute of Polymer Optoelectronic Materials and Devices South China University of Technology Wushan Road 381, Tianhe District Guangzhou Guangdong Province 510640 P. R. China
Jiadong Zhou: State Key Laboratory of Luminescent Materials and Devices and Institute of Polymer Optoelectronic Materials and Devices South China University of Technology Wushan Road 381, Tianhe District Guangzhou Guangdong Province 510640 P. R. China
Shi‐Jian Su: State Key Laboratory of Luminescent Materials and Devices and Institute of Polymer Optoelectronic Materials and Devices South China University of Technology Wushan Road 381, Tianhe District Guangzhou Guangdong Province 510640 P. R. China

DOI: https://doi.org/10.1002/advs.202207003
Journal volume & issue: Vol. 10, no. 12
pp. n/a – n/a

Abstract

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Abstract Purely organic room‐temperature phosphorescence (RTP) materials generally exhibit low phosphorescence quantum yield (ϕP) and long phosphorescence lifetime (τP) due to the theoretically spin‐forbidden triplet state. Herein, by introducing a donor–acceptor (D–A) skeleton with a phenoxaselenine donor, three nonaromatic amine donor containing compounds with high ϕP and short τP in amorphous films are developed. Besides the enhanced spin–orbit coupling (SOC) by the heavy‐atom effect of selenium, the D–A skeleton which facilitates orbital angular momentum change can further boost SOC, and severe nonradiative energy dissipation is also suppressed by the rigid molecular structure. Consequently, a record‐high external quantum efficiency of 19.5% are achieved for the RTP organic light‐emitting diode (OLED) based on 2‐(phenoxaselenin‐3‐yl)‐4,6‐diphenyl‐1,3,5‐triazine (PXSeDRZ). Moreover, voltage‐dependent color‐tunable emission and single‐molecule white emission are also realized. These results shed light on the broad prospects of purely organic phosphorescence materials as highly efficient OLED emitters especially for potential charming lighting applications.

Published in Advanced Science

ISSN: 2198-3844 (Online)
Publisher: Wiley
Country of publisher: Germany
LCC subjects: Science
Website: https://onlinelibrary.wiley.com/journal/21983844

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