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; Zhiyong Fan

doi:10.1038/s41467-023-40150-y

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

Nat Commun. 2023 Aug 1;14(1):4611. doi: 10.1038/s41467-023-40150-y.

Authors

Yang Bryan Cao^{1

2

3}, Daquan Zhang^{1

2

3}, Qianpeng Zhang^{1

2

3}, Xiao Qiu^{1

2

3}, Yu Zhou^{1

2

3}, Swapnadeep Poddar^{1

2

3}, Yu Fu^{1

2

3}, Yudong Zhu^{1

4}, Jin-Feng Liao⁵, Lei Shu^{1

2

3}, Beitao Ren^{1

2

3}, Yucheng Ding^{1

2

3}, Bing Han⁴, Zhubing He⁴, Dai-Bin Kuang⁵, Kefan Wang⁶, Haibo Zeng⁷, Zhiyong Fan^{8

9

10}

Affiliations

¹ Department of Electronic & Computer Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China.
² State Key Laboratory of Advanced Display and Optoelectronics Technologies HKUST, Clear Water Bay, Kowloon, Hong Kong SAR, China.
³ Guangdong-Hong Kong-Macau Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology, HKUST, Clear Water Bay, Kowloon, Hong Kong SAR, China.
⁴ Department of Materials Science and Engineering, Southern University of Science and Technology, No. 1088, Xueyuan Rd., Shenzhen, 518055, Guangdong, China.
⁵ MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, Lehn Institute of Functional Materials, School of Chemistry, Sun Yat-sen University, Guangzhou, 510275, China.
⁶ Henan Provinces Key Laboratory of Photovoltaic Materials, Henan University, Kaifeng, 475004, Henan, China.
⁷ MIIT Key Laboratory of Advanced Display Materials and Devices, Institute of Optoelectronics & Nanomaterials, School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China. zeng.haibo@njust.edu.cn.
⁸ Department of Electronic & Computer Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China. eezfan@ust.hk.
⁹ State Key Laboratory of Advanced Display and Optoelectronics Technologies HKUST, Clear Water Bay, Kowloon, Hong Kong SAR, China. eezfan@ust.hk.
¹⁰ Guangdong-Hong Kong-Macau Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology, HKUST, Clear Water Bay, Kowloon, Hong Kong SAR, China. eezfan@ust.hk.

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.