High-efficiency, flexible and large-area red/green/blue all-inorganic metal halide perovskite quantum wires-based light-emitting diodes

Yang Bryan Cao, Daquan Zhang, Qianpeng Zhang, Xiao Qiu, Yu Zhou, Swapnadeep Poddar, Yu Fu, Yudong Zhu, Jin-Feng Liao, Lei Shu, Beitao Ren, Yucheng Ding, Bing Han, Zhubing He, Dai-Bin Kuang, Kefan Wang, Haibo Zeng () and Zhiyong Fan ()
Additional contact information
Yang Bryan Cao: The Hong Kong University of Science and Technology, Clear Water Bay
Daquan Zhang: The Hong Kong University of Science and Technology, Clear Water Bay
Qianpeng Zhang: The Hong Kong University of Science and Technology, Clear Water Bay
Xiao Qiu: The Hong Kong University of Science and Technology, Clear Water Bay
Yu Zhou: The Hong Kong University of Science and Technology, Clear Water Bay
Swapnadeep Poddar: The Hong Kong University of Science and Technology, Clear Water Bay
Yu Fu: The Hong Kong University of Science and Technology, Clear Water Bay
Yudong Zhu: The Hong Kong University of Science and Technology, Clear Water Bay
Jin-Feng Liao: Sun Yat‐sen University
Lei Shu: The Hong Kong University of Science and Technology, Clear Water Bay
Beitao Ren: The Hong Kong University of Science and Technology, Clear Water Bay
Yucheng Ding: The Hong Kong University of Science and Technology, Clear Water Bay
Bing Han: Southern University of Science and Technology, No. 1088
Zhubing He: Southern University of Science and Technology, No. 1088
Dai-Bin Kuang: Sun Yat‐sen University
Kefan Wang: Henan University
Haibo Zeng: Nanjing University of Science and Technology
Zhiyong Fan: The Hong Kong University of Science and Technology, Clear Water Bay

Nature Communications, 2023, vol. 14, issue 1, 1-9

Abstract: Abstract Metal halide perovskites have shown great promise as a potential candidate for next-generation solid state lighting and display technologies. However, a generic organic ligand-free and antisolvent-free solution method to fabricate highly efficient full-color perovskite light-emitting diodes has not been realized. Herein, by utilizing porous alumina membranes with ultra-small pore size as templates, we have successfully fabricated crystalline all-inorganic perovskite quantum wire arrays with ultrahigh density and excellent uniformity, using a generic organic ligand-free and anti-solvent-free solution method. The quantum confinement effect, in conjunction with the high light out-coupling efficiency, results in high photoluminescence quantum yield for blue, sky-blue, green and pure-red perovskite quantum wires arrays. Consequently, blue, sky-blue, green and pure-red LED devices with spectrally stable electroluminescence have been successfully fabricated, demonstrating external quantum efficiencies of 12.41%, 16.49%, 26.09% and 9.97%, respectively, after introducing a dual-functional small molecule, which serves as surface passivation and hole transporting layer, and a halide vacancy healing agent.

Date: 2023
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DOI: 10.1038/s41467-023-40150-y

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