Nonlocal interaction enhanced biexciton emission in large CsPbBr<sub>3</sub> nanocrystals

Peng Huang; Shipei Sun; Hairui Lei; Yongyou Zhang; Haiyan Qin; Haizheng Zhong

doi:10.1186/s43593-023-00045-3

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Nonlocal interaction enhanced biexciton emission in large CsPbBr₃ nanocrystals

eLight Vol. 3, Issue 1, (2023)

RESEARCH ARTICLE | Updated：2024-09-25

- Nonlocal interaction enhanced biexciton emission in large CsPbBr₃ nanocrystals
- Affiliations：
  
  MIIT Key Laboratory for Low-Dimensional Quantum Structure and Devices, School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, China
  Beijing Key Laboratory of Nanophotonics and Ultrafine Optoelectronic Systems, School of Physics, Beijing Institute of Technology, Beijing 100081, China
  Key Laboratory of Excited-State Materials of Zhejiang Province, Department of Chemistry, Zhejiang University, Hangzhou 310027, China
- Author bio：
  
  *Yongyou Zhangyyzhang@bit.edu.cn
  Haiyan Qinhattieqin@zju.edu.cn
  Haizheng Zhonghzzhong@bit.edu.cn
- Funds：
- DOI：10.1186/s43593-023-00045-3
  CLC：
- Published：2023，
  
  Published Online：22 May 2023，
  
  Received：03 March 2023，
  
  Revised：06 April 2023，
  
  Accepted：15 April 2023
- Accepted：
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Peng Huang, Shipei Sun, Hairui Lei, et al. Nonlocal interaction enhanced biexciton emission in large CsPbBr₃ nanocrystals. [J]. eLight, 2023,3(1).
DOI：

Peng Huang, Shipei Sun, Hairui Lei, et al. Nonlocal interaction enhanced biexciton emission in large CsPbBr₃ nanocrystals. [J]. eLight, 2023,3(1). DOI： 10.1186/s43593-023-00045-3.

摘要

Abstract

Biexciton emission in quantum dots is an efficient way to generate entangled photon pairs

which are key resources in quantum informatics. Compared with epitaxial grown quantum dots

chemically synthesized colloidal quantum dots show advantages of tunable wavelength and easy integration to realize quantum light sources. However

biexciton efficiency of colloidal quantum dots has been limited by Auger recombination. In this paper

we reported nonlocal interaction enhanced biexciton emission with efficiency up to 80% in large perovskite nanocrystals (> 20 nm). The nonlocal interaction between carriers and excitons leads to the abnormal exponential decrease of Auger recombination with volume in large nanocrystals

which distinguishes with the linear scaling in small counterparts. Such an exponential decrease of Auger recombination results in long lifetime of biexcitons

responsible for the required high biexciton efficiency. The discovery of nonlocal effects in large semiconductor nanocrystals provides new strategies to achieve high efficiency multiple excitons for quantum optics and energy conversation applications.

关键词

Keywords

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Nonlocal interaction enhanced biexciton emission in large CsPbBr3 nanocrystals

DOI：10.1186/s43593-023-00045-3

摘要

Abstract

关键词

Keywords

references

Nonlocal interaction enhanced biexciton emission in large CsPbBr₃ nanocrystals