Multifunctional ligand engineering enables high-performance CsPb(Br/Cl)<sub>3</sub> nanocrystals toward efficient and stable pure-blue perovskite LEDs

Maimaitizi Hujiabudula; Hans Ågren; Guanying Chen

doi:10.1038/s41377-026-02214-8

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Multifunctional ligand engineering enables high-performance CsPb(Br/Cl)₃ nanocrystals toward efficient and stable pure-blue perovskite LEDs

Original Articles

- Multifunctional ligand engineering enables high-performance CsPb(Br/Cl)₃ nanocrystals toward efficient and stable pure-blue perovskite LEDs
- Light: Science & Applications Vol. 15, Issue 5, Pages: 1511-1522(2026)
- Affiliations：
  
  1.MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering & Key Laboratory of Micro-systems and Micro-structures, Ministry of Education, Harbin Institute of Technology, Harbin, China
  2.State Key Laboratory of Space Power-Sources, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, China
  3.Harbin KY Semiconductor Inc., Harbin, China
  4.Division of X-ray Photon Science, Department of Physics and Astronomy, Uppsala University, Uppsala, Sweden
  5.Harbin Institute of Technology (Weihai) Qingdao Research Institute, Qingdao, China
- Author bio：
  
  Guanying Chen (chenguanying@hit.edu.cn)
- Funds：
- DOI：10.1038/s41377-026-02214-8
  CLC：
- Received：09 July 2025，
  
  Revised：2025-12-22，
  
  Accepted：26 January 2026，
  
  Online First：28 February 2026，
  
  Published：31 May 2026
- Accepted：
Scan QR Code
Hujiabudula, M., Ågren, H. & Chen, G. Y. Multifunctional ligand engineering enables high-performance CsPb(Br/Cl)₃ nanocrystals toward efficient and stable pure-blue perovskite LEDs. Light: Science & Applications, 15, 1511-1522 (2026). DOI: 10.1038/s41377-026-02214-8.
DOI：

Hujiabudula, M., Ågren, H. & Chen, G. Y. Multifunctional ligand engineering enables high-performance CsPb(Br/Cl)₃ nanocrystals toward efficient and stable pure-blue perovskite LEDs. Light: Science & Applications, 15, 1511-1522 (2026). DOI: 10.1038/s41377-026-02214-8. DOI：

摘要

Abstract

The development of pure-blue perovskite light-emitting diodes (PeLEDs) still lags behind that of green and red-emitting PeLEDs. Mixed halide (Br/Cl) perovskite nanocrystals (PeNCs) are commonly employed for blue emission but suffer from halide vacancies and ion migration. Here

we present a passivation strategy using the multifunctional fluorinated phosphonic acid molecule (1H

2H-heptadecafluorodec-1-yl)phosphonic acid (HFPA)

which possesses active functional groups that improve the stability and electroluminescence performance of CsPb(Br/Cl)

NCs. The HFPA molecule is shown to interact with uncoordinated Pb

on the PeNC surface through the phosphonate groups

concurrently establishing hyd

rogen bonds with adjacent halide ions. Moreover

the presence of fluorine atoms promotes ionic bond formation with the halide octahedra

thereby stabilizing the octahedral structure. The fabricated PeNC-LEDs exhibited a spectrally stable pure-blue emission peak at 467 nm

achieving a significantly improved external quantum efficiency (14.8%

9-fold higher)

maximum luminance (1052 cd·m

-2

10-fold higher)

and half-life (342 s

13-fold higher) compared to the device fabricated with unmodified CsPb(Br/Cl)

NCs. Furthermore

the effective passivation of surface vacancies and stabilization of halogen ions by the HFPA molecules successfully suppressed ion migration in the PeNC-LEDs

thereby significantly enhancing the stability of the device.

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Keywords

references

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Multifunctional ligand engineering enables high-performance CsPb(Br/Cl)3 nanocrystals toward efficient and stable pure-blue perovskite LEDs

DOI：10.1038/s41377-026-02214-8

摘要

Abstract

关键词

Keywords

references

Multifunctional ligand engineering enables high-performance CsPb(Br/Cl)₃ nanocrystals toward efficient and stable pure-blue perovskite LEDs