In-situ growth of low-dimensional perovskite-based insular nanocrystals for highly efficient light emitting diodes

Hao Wang; Weidong Xu; Qi Wei; Si Peng; Yuequn Shang; Xianyuan Jiang; Danni Yu; Kai Wang; Ruihua Pu; Chenxi Zhao; Zihao Zang; Hansheng Li; Yile Zhang; Ting Pan; Zijian Peng; Xiaoqin Shen; Shengjie Ling; Weimin Liu; Feng Gao; Zhijun Ning

doi:10.1038/s41377-023-01112-7

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In-situ growth of low-dimensional perovskite-based insular nanocrystals for highly efficient light emitting diodes

Original Articles

- In-situ growth of low-dimensional perovskite-based insular nanocrystals for highly efficient light emitting diodes
- Light: Science & Applications Vol. 12, Issue 3, Pages: 446-455(2023)
- Affiliations：
  
  1.School of Physical Science and Technology & Shanghai Key Laboratory of High-resolution Electron Microscopy, ShanghaiTech University, Shanghai, China
  2.Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, China
  3.Department of Physics, Chemistry and Biology (IFM), Linköping University, Linköping, Sweden
- Author bio：
  
  Feng Gao (feng.gao@liu.se)
  Zhijun Ning (ningzhj@shanghaitech.edu.cn)
- Funds：
- DOI：10.1038/s41377-023-01112-7
  CLC：
- Published：31 March 2023，
  
  Published Online：3 March 2023，
  
  Received：8 September 2022，
  
  Revised：16 February 2023，
  
  Accepted：17 February 2023
Scan for full text
Wang, H. et al. In-situ growth of low-dimensional perovskitebased insular nanocrystals for highly efficient light emitting diodes. Light: Science & Applications, 12, 446-455 (2023).
DOI：

Wang, H. et al. In-situ growth of low-dimensional perovskitebased insular nanocrystals for highly efficient light emitting diodes. Light: Science & Applications, 12, 446-455 (2023). DOI： 10.1038/s41377-023-01112-7.

摘要

Abstract

Regulation of perovskite growth plays a critical role in the development of high-performance optoelectronic devices. However

judicious control of the grain growth for perovskite light emitting diodes is elusive due to its multiple requirements in terms of morphology

composition

and defect. Herein

we demonstrate a supramolecular dynamic coordination strategy to regulate perovskite crystallization. The combined use of crown ether and sodium trifluoroacetate can coordinate with A site and B site cations in ABX

perovskite

respectively. The formation of supramolecular structure retard perovskite nucleation

while the transformation of supramolecular intermediate structure enables the release of components for slow perovskite growth. This judicious control enables a segmented growth

inducing the growth of insular nanocrystal consist of low-dimensional structure. Light emitting diode based on this perovskite film eventually brings a peak external quantum efficiency up to 23.9%

ranking among the highest efficiency achieved. The homogeneous nano-island structure also enables high-efficiency large area (1 cm

) device up to 21.6%

and a record high value of 13.6% for highly semi-transparent ones.

关键词

Keywords

references

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