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Phase dimensions resolving of efficient and stable perovskite light-emitting diodes at high brightness

Nature Photonics volume 18, pages 363–370 (2024)Cite this article

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Abstract

The efficiency and stability issues of perovskite light-emitting diodes, especially at high brightness, need to be urgently solved for displays and lighting applications. Herein we present a simple chemical washing method called solvent sieve to resolve the phase dimension issue of metal halide perovskites. After being sieved, undesirable defect-rich low-n phases are selectively screened out of perovskite multi-quantum-well structures. With better intrinsic structure refinement, the sieved perovskites demonstrated not only a record external quantum efficiency, current efficiency, and T50 lifetime of 29.5%, 127.4 cd A−1, and 18.67 h at 12,000 cd m−2 (the equivalent of over 50,317 h or 5.7 years at 100 cd m−2), respectively, with a maximum luminance of over 147,872.8 cd m−2, but also extraordinary resistance to air and moisture, maintaining over 75% of film photoluminescence quantum yield and 80% of device EQE after being stored at ambience for 100 days. The simple solvent sieve treatment we reported here confirms the feasibility of metal halide perovskites for luminescence and unleashes the efficiency and stability potentials of high-brightness perovskite light-emitting diodes for future commercial applications.

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Fig. 1: Effects of solvent sieves.
Fig. 2: Intrinsic stability and energy funneling of solvent-sieved perovskites.
Fig. 3: PeLEDs performance.
Fig. 4: Stability of PeLEDs.

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Data availability

The data that support the findings of this study are available in the paper, Supplementary Information, as well as from the corresponding authors on reasonable request.

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Acknowledgements

This work was supported by the National Key Research and Development Program of China (grant no. 2022YFB3602902 to C.X.), Zhejiang Provincial Natural Science Foundation of China (grant no. LR21F050001 to C.X.), the Key projects of National Natural Science Foundation of China (grat no. 62234004 to C.X.), Ningbo 3315 Programme (grant no. 2020A-01-B to L.Q.), Ningbo Key Technologies R & D Program (grant no. 2022Z085 to Z.T.) and YONGJIANG Talent Introduction Programme (grant no. 2021A-038-B to C.X.). S.D. acknowledged Zhiwei Yao from NIMTE and Shichen Yin from North Carolina State University for experimental discussion. We are grateful for the technical support for Nano-X from Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences (SINANO). The paper was dedicated in memory of Lei Qian, who was a great mentor, colleague and friend. He made many significant scientific contributions during his highly productive career and will be remembered.

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Authors and Affiliations

  1. Division of Functional Materials and Nanodevices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, China

    Shuo Ding, Qiangqiang Wang, Wencui Gu, Zhaobing Tang, Bo Zhang, Chunyan Wu, Xuanyu Zhang, Lei Qian & Chaoyu Xiang

  2. Hangzhou Bay Laboratory of Advanced Nano–Optoelectronic Materials and Devices, Qianwan Institute of CNITECH, Ningbo, China

    Shuo Ding, Qiangqiang Wang, Zhaobing Tang, Bo Zhang, Chunyan Wu, Xuanyu Zhang, Lei Qian & Chaoyu Xiang

  3. Department of Mechanical, Materials and Manufacturing Engineering, University of Nottingham Ningbo China, Ningbo, China

    Shuo Ding, Hao Chen & Xinyu Zhang

  4. Department of Chemical and Environmental Engineering, University of Nottingham Ningbo China, Ningbo, China

    Xuanyu Zhang

  5. 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, China

    Rui Cao & Tao Chen

  6. Zhejiang Provincial Engineering Research Center of Energy Optoelectronic Materials and Devices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, China

    Lei Qian & Chaoyu Xiang

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  1. Shuo Ding
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Contributions

S.D. and C.X. conceived the study. S.D. developed the solvent sieve method, fabricated light-emitting devices, and performed EQE and stability tests. S.D. and Z.T. characterized perovskite properties. Q.W., W.G. and B.Z. assisted perovskite fabrication and device optimization. C.W. and Xuanyu Zhang assisted perovskite characterization and data analysis. H.C. and Xinyu Zhang advised on project design. R.C. and T.C. conducted TAS tests. C.X. and L.Q. supervised the project. L.Q. served as the corresponding author throughout production of the paper. All authors discussed the results and commented on the paper.

Corresponding author

Correspondence to Chaoyu Xiang.

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Nature Photonics thanks Takayuki Chiba and the other, anonymous, reviewer(s) for their contribution to the peer review of this work.

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Supplementary Figs. 1–22, Tables 1–4 and Notes 1 and 2.

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Ding, S., Wang, Q., Gu, W. et al. Phase dimensions resolving of efficient and stable perovskite light-emitting diodes at high brightness. Nat. Photon. 18, 363–370 (2024). https://doi.org/10.1038/s41566-023-01372-0

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