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

Research output: Contribution to journalArticle

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
JournalMatter
DOIs
Publication statusAccepted/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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  • Cite this

    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