DataVXACS Energy LettersPaper
journal article·2023-03-10Open access

A Multifunctional Small-Molecule Hole-Transporting Material Enables Perovskite QLEDs with EQE Exceeding 20%

Xiansheng Li, Mahdi Haghshenas, Linqin Wang, Jing Huang, Esmaeil Sheibani, Shichen Yuan, Xin Luo, Xuehan Chen, Changting Wei, Hengyang Xiang, Glib Baryshnikov, Licheng Sun, Haibo Zeng, Bo Xu

ACS Energy Letters· Volume 8· Issue 3
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Source abstract

Abstract

Hole-transporting materials (HTMs) play critical roles in the device performance and stability of perovskite quantum dot light-emitting diodes (Pe-QLEDs). However, the development of small-molecule HTMs for achieving high-performance Pe-QLEDs has proven to be very challenging because of their low hole mobility and poor solvent resistance. Herein, we tailor-made a multifunctional small-molecule HTM, termed X10, with methoxy as the substituents, for application in Pe-QLEDs. X10 features high hole mobility, good film-forming ability, and strong solvent resistance ability as well as defect passivation effect. Subsequently, Pe-QLEDs employing X10 as HTM presented a promising external quantum efficiency (EQE) of 20.18%, which is 7-fold higher than that of the reference HTM- TCTA -based ones (EQE ≈ 2.88%). To the best of our knowledge, this is the first case in which a small-molecule HTM displays a high EQE over 20% in Pe-QLEDs. Our work provides important guidance for the rational design of multifunctional small-molecule HTMs for high-performance Pe-QLEDs.
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Research context

Electronic materials

OpenAlex topics: Perovskite Materials and Applications · Quantum Dots Synthesis And Properties · Organic Light-Emitting Diodes Research

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

MIIT Key Laboratory of Advanced Display Materials and Devices, School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China

Department of Chemistry, University of Isfahan, Isfahan 81746-73441, Iran

Center of Artificial Photosynthesis for Solar Fuels and Department of Chemistry, School of Science, Westlake University, Hangzhou 310024, P. R. China

School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, China

Laboratory of Organic Electronics, Department of Science and Technology, Linköping University, 60174 Norrköping, Sweden

Funding

Vetenskapsr?det · Ministry of Science and Technology of the People's Republic of China · Iran National Science Foundation · Nanjing University of Science and Technology · University of Isfahan · Central University Basic Research Fund of China · National Natural Science Foundation of China · Research Innovation Program of Nanjing Overseas Returnees

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