Inch-Size 0D-Structured Lead-Free Perovskite Single Crystals for Highly Sensitive Stable X-Ray Imaging

Yucheng Liu, Zhuo Xu, Zhou Yang, Yunxia Zhang, Jian Cui, Yihui He, Haochen Ye, Kui Zhao, Huaming Sun, Rui Lu, Ming Liu, Mercouri G. Kanatzidis, Shengzhong (Frank) Liu*

*Corresponding author for this work

Research output: Contribution to journalArticle

1 Scopus citations

Abstract

Ion migration in perovskite materials accelerates its decomposition—deteriorating device performance, causing baseline drift, and lowering imaging resolution. In particular, in X-ray detectors, the effect of ion migration is more obvious under the necessary high working bias. Here, we report an effective strategy to grow superior inch-sized, high-quality, zero-dimensional (0D)-structured, lead-free (CH3NH3)3Bi2I9 perovskite single crystals. These crystals have significantly lower ion migration, reduced dark current, and better environmental stability compared with other perovskites, enabling us to fabricate a type of 0D-structured perovskite X-ray detector. The X-ray detector shows high sensitivity of 1,947 μC Gyair −1 cm−2, low detection limit of 83 nGyair s−1, short response time of 23.3 ms, the lowest baseline drift of 5.0 × 10−10 nA cm−1 s−1 V−1, and the best long-term stability among all perovskites reported. The combination of large crystal size and excellent X-ray response allows us to fabricate the first 0D-structured perovskite X-ray imaging system.

Original languageEnglish (US)
JournalMatter
DOIs
StateAccepted/In press - 2020

Keywords

  • 0D-structure
  • MAP5: Improvement
  • X-ray imaging
  • highly sensitive
  • lead-free
  • low detection limit
  • perovskite
  • single crystal

ASJC Scopus subject areas

  • Materials Science(all)

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    Liu, Y., Xu, Z., Yang, Z., Zhang, Y., Cui, J., He, Y., Ye, H., Zhao, K., Sun, H., Lu, R., Liu, M., Kanatzidis, M. G., & Liu, S. F. (Accepted/In press). Inch-Size 0D-Structured Lead-Free Perovskite Single Crystals for Highly Sensitive Stable X-Ray Imaging. Matter. https://doi.org/10.1016/j.matt.2020.04.017