journal article·2023-01

Improving the Operational Stability of Near‐Infrared Quasi‐2D Perovskite Light‐Emitting Diodes by Cation Engineering

Qiangqiang Wang, Shuo Ding, Siliang He, Ting Zhang, Lei Qian, Peng Xiao, Tao Chen, Chaoyu Xiang

Advanced Optical Materials· Volume 11· Issue 1
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Abstract

Abstract Although organic metal halide perovskite light‐emitting diodes (PeLEDs) have been developed rapidly in recent years, their commercialization and further applications are still hindered by ion migration‐induced inferior operational stability. Although the formation of a quasi‐2D structure is a well‐known solution that can efficiently suppress ion migration, the operation lifetime improvement is still limited. In this study, long‐chain phenylbutanammonium is used to replace the commonly used phenethylammonium as the L‐site cations. With large steric hindrance, ion migration inside the PeLEDs is effectively suppressed. Consequently, the PeLED with near‐infrared emission at 763 nm exhibited an operational lifetime (T90) of up to 5.3 h, which is 53‐fold higher than that of the control device. This study demonstrates the feasibility of significant stability improvement using a simple cation engineering strategy for PeLEDs.
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Research context

OpenAlex topics: Perovskite Materials and Applications · Organic Light-Emitting Diodes Research · Conducting polymers and applications

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

Affiliations

Division of Functional Materials and Nanodevices Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo 315201 P. R. China

Laboratory of Advanced Nano‐Optoelectronic Materials and Devices Ningbo Institute of Materials Technology and Engineering Qianwan Institute of CNITECH Ningbo 315300 P. R. China

Zhejiang Provincial Engineering Research Center of Energy Optoelectronic Materials and Devices Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo 315201 P. R. China

School of Mechanical Engineering and Mechanics Ningbo University Ningbo Zhejiang 315211 P. R. China

Department of Mechanical, Materials and Manufacturing Engineering University of Nottingham Ningbo China Ningbo Zhejiang 315100 P. R. China

Department of Chemical Engineering and Material Science University of Minnesota Twin Cities Minneapolis MN 55455 USA

Hefei National Laboratory for Physical Sciences at Microscale CAS Key Laboratory of Materials for Energy Conversion Department of Materials Science and Engineering School of Chemistry and Materials Science University of Science and Technology of China Hefei Anhui 230026 P. R. China

Funding

National Natural Science Foundation of China · Science and Technology Innovation 2025 Major Project of Ningbo

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