In-situ formation of oriented perovskite nanosheets with tailored optical dipoles enabling &gt;30% EQE in pure-red LEDs

Shaowei Liu; Dezhong Zhang; Lei Wang; Binhe Li; Wei Yuan; Ziheng Xiong; Kai Chen; Helong Zhu; Wenping Wu; Shuang Li; Liu Yang; Yunzhuo Liu; Hongmei Zhan; Chuanli Qin; Jiaqi Zhang; Jun Liu; Lixiang Wang; Chuanjiang Qin

doi:10.1038/s41377-026-02184-x

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In-situ formation of oriented perovskite nanosheets with tailored optical dipoles enabling >30% EQE in pure-red LEDs

Original Articles

- In-situ formation of oriented perovskite nanosheets with tailored optical dipoles enabling >30% EQE in pure-red LEDs
- Light: Science & Applications Vol. 15, Issue 6, Pages: 1895-1903(2026)
- Affiliations：
  
  1.School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China
  2.State Key Laboratory of Polymer Science and Technology, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
  3.College of Materials Science and Engineering, State Key Laboratory of Integrated Optoelectronics, Key Laboratory of Automobile Materials Ministry of Education, Jilin University, Changchun 130000, China
  4.School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei 230026, China
  5.Robinson Research Institute, Faculty of Engineering, Victoria University of Wellington, Wellington 6012, New Zealand
- Author bio：
  
  Dezhong Zhang (dzzhang@ciac.ac.cn)
  Hongmei Zhan (hmzhan@ciac.ac.cn)
  Chuanli Qin (qinchuanli@hlju.edu.cn)
  Chuanjiang Qin (cjqin@ciac.ac.cn)
- Funds：
- DOI：10.1038/s41377-026-02184-x
  CLC：
- Received：22 September 2025，
  
  Revised：2026-01-05，
  
  Accepted：05 January 2026，
  
  Online First：11 March 2026，
  
  Published：30 June 2026
- Accepted：
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Liu, S. W. et al. In-situ formation of oriented perovskite nanosheets with tailored optical dipoles enabling >30% EQE in pure-red LEDs. Light: Science & Applications, 15, 1895-1903 (2026).
DOI：

Liu, S. W. et al. In-situ formation of oriented perovskite nanosheets with tailored optical dipoles enabling >30% EQE in pure-red LEDs. Light: Science & Applications, 15, 1895-1903 (2026). DOI： 10.1038/s41377-026-02184-x.

摘要

Abstract

The integration of crystallographic control into solution-processed perovskite films remains a challenge for efficient light emission

as disordered optical dipoles fundamentally limit photon extraction

a bottleneck constraining both classical and quantum planar optoelectronic devices. Here

we address this by developing an in situ formation strategy for oriented quasi-2D perovskite nanosheets within films via ligand-engineered crystallization. By designing and orchestrating steric hindrance and π–π interactions of ligands

we direct the crystallization kinetics to yield regular face-on nanosheets exhibiting enhanced horizontal transition dipole moment orientation compared to conventional isotropic films. The in situ architectural control also elevates both the photoluminescence quantum yield beyond 90% and carrier mobility comparable to 3D perovskite levels. These synergies enable perovskite light-emitting diodes (PeLEDs) with an external quantum efficiency (EQE) of 31.2% for pure-red emission at 635 nm

comparing favorably to other pure-red PeLEDs. Concurrently

the peak luminance and operational stability of the in situ nanosheet PeLEDs exhibit significant improvements.

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references

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In-situ formation of oriented perovskite nanosheets with tailored optical dipoles enabling >30% EQE in pure-red LEDs

DOI：10.1038/s41377-026-02184-x

摘要

Abstract

关键词

Keywords

references