Multiple defects renovation and phase reconstruction of reduced-dimensional perovskites via in situ chlorination for efficient deep-blue (454 nm) light-emitting diodes

Mubing Yu; Tingxiao Qin; Gang Gao; Kelei Zu; Dongming Zhang; Nan Chen; Dengke Wang; Yong Hua; Hong Zhang; Yong-Biao Zhao; Jiaqi Zhu

doi:10.1038/s41377-025-01768-3

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Multiple defects renovation and phase reconstruction of reduced-dimensional perovskites via in situ chlorination for efficient deep-blue (454 nm) light-emitting diodes

Original Articles

- Multiple defects renovation and phase reconstruction of reduced-dimensional perovskites via in situ chlorination for efficient deep-blue (454 nm) light-emitting diodes
- Light: Science & Applications Vol. 14, Issue 4, Pages: 1041-1050(2025)
- Affiliations：
  
  1.National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, 150080 Harbin, China
  2.Zhengzhou Research Institute, Harbin Institute of Technology, 450046 Zhengzhou, China
  3.Beijing Academy of Quantum Information Sciences, 100193 Beijing, China
  4.Center for Optoelectronics Engineering Research, School of Physics and Astronomy, Yunnan University, 650500 Kunming, China
  5.Yunnan Key Laboratory for Micro/Nano Materials & Technology, School of Materials and Energy, Yunnan University, 650500 Kunming, China
  6.Key Laboratory of Micro-systems and Micro-structures Manufacturing Ministry of Education, Harbin Institute of Technology, 150080 Harbin, China
- Author bio：
  
  Gang Gao (gaogang@hit.edu.cn)
  Yong-Biao Zhao (yzhao@ynu.edu.cn)
  Jiaqi Zhu (zhujq@hit.edu.cn)
- Funds：
- DOI：10.1038/s41377-025-01768-3
  CLC：
- Received：26 September 2024，
  
  Revised：16 January 2025，
  
  Accepted：2025-01-25，
  
  Published Online：26 February 2025，
  
  Published：30 April 2025
- Accepted：
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Yu, M. B. et al. Multiple defects renovation and phase reconstruction of reduced-dimensional perovskites via in situ chlorination for efficient deep-blue (454 nm) light-emitting diodes. Light: Science & Applications, 14, 1041-1050 (2025).
DOI：

Yu, M. B. et al. Multiple defects renovation and phase reconstruction of reduced-dimensional perovskites via in situ chlorination for efficient deep-blue (454 nm) light-emitting diodes. Light: Science & Applications, 14, 1041-1050 (2025). DOI： 10.1038/s41377-025-01768-3.

摘要

Abstract

Deep-blue perovskite light-emitting diodes (PeLEDs) based on reduced-dimensional perovskites (RDPs) still face a few challenges including severe trap-assisted nonradiative recombination

sluggish exciton transfer

and undesirable bathochromic shift of the electroluminescence spectra

impeding the realization of high-performance PeLEDs. Herein

an in situ chlorination (isCl) post-treatment strategy was employed to regulate phase reconstruction and renovate multiple defects of RDPs

leading to superior carrier cooling of 0.88 ps

extraordinary exciton binding energy of 122.53 meV

and higher photoluminescence quantum yield of 60.9% for RDP films with deep-blue emission at 450 nm. The phase regulation is accomplished via fluorine-derived hydrogen bonds that suppress the formation of small-

phases. Multiple defects

including halide vacancies (shallow-state defects) and lead-chloride antisite defects (deep-state defects)

are renovated via C=O coordination and hydroxy-group-derived hydrogen bonds. Consequently

deep-blue PeLEDs with a record maximum external quantum efficiency of 6.17% and stable electroluminescence at 454 nm were demonstrated

representing the best-performing deep-blue Pe

LEDs.

关键词

Keywords

references

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