Bottom-up construction of low-dimensional perovskite thick films for high-performance X-ray detection and imaging

Siyin Dong; Zhenghui Fan; Wei Wei; Shujie Tie; Ruihan Yuan; Bin Zhou; Ning Yang; Xiaojia Zheng; Liang Shen

doi:10.1038/s41377-024-01521-2

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Bottom-up construction of low-dimensional perovskite thick films for high-performance X-ray detection and imaging

Original Articles

- Bottom-up construction of low-dimensional perovskite thick films for high-performance X-ray detection and imaging
- Light: Science & Applications Vol. 13, Issue 9, Pages: 1809-1819(2024)
- Affiliations：
  
  1.Sichuan Research Center of New Materials, Institute of Chemical Materials, China Academy of Engineering Physics, Shuangliu, Chengdu, China
  2.State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, International Center of Future Science, Jilin University, Changchun, China
- Author bio：
  
  Xiaojia Zheng (xiaojia@caep.cn)
  Liang Shen (shenliang@jlu.edu.cn)
- Funds：
- DOI：10.1038/s41377-024-01521-2
  CLC：
- Received：20 January 2024，
  
  Revised：31 May 2024，
  
  Accepted：2024-07-02，
  
  Published Online：23 July 2024，
  
  Published：30 September 2024
- Accepted：
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Dong, S. Y. et al. Bottom-up construction of low-dimensional perovskite thick films for high-performance X-ray detection and imaging. Light: Science & Applications, 13, 1809-1819 (2024).
DOI：

Dong, S. Y. et al. Bottom-up construction of low-dimensional perovskite thick films for high-performance X-ray detection and imaging. Light: Science & Applications, 13, 1809-1819 (2024). DOI： 10.1038/s41377-024-01521-2.

摘要

Abstract

Quasi-two-dimensional (Q-2D) perovskite exhibits exceptional photoelectric properties and demonstrates reduced ion migration compared to 3D perovskite

making it a promising material for the fabrication of highly sensitive and stable X-ray detectors. However

achieving high-quality perovskite films with sufficient thickness for efficient X-ray absorption remains challenging. Herein

we present a novel approach to regulate the growth of Q-2D perovskite crystals in a mixed atmosphere comprising methylamine (CH

MA) and ammonia (NH

)

resulting in the successful fabrication of high-quality films with a thickness of hundreds of micrometers. Subsequently

we build a heterojunction X-ray detector by incorporating the perovskite layer with titanium dioxide (TiO

). The precise regulation of perovskite crystal growth and

the meticulous design of the device structure synergistically enhance the resistivity and carrier transport properties of the X-ray detector

resulting in an ultrahigh sensitivity (29721.4 μC Gy

air

−1

−2

) for low-dimensional perovskite X-ray detectors and a low detection limit of 20.9 nGy

air

−1

. We have further demonstrated a flat panel X-ray imager (FPXI) showing a high spatial resolution of 3.6 lp mm

−1

and outstanding X-ray imaging capability under low X-ray doses. This work presents an effective methodology for achieving high-performance Q-2D perovskite FPXIs that holds great promise for various applications in imaging technology.

关键词

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references

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