Sn-Based Perovskite for Highly Sensitive Photodetectors

Chun Ki Liu, Qidong Tai, Naixiang Wang, Guanqi Tang, Hok Leung Loi, Feng Yan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

62 Citations (Scopus)


Organic–inorganic hybrid perovskites have emerged as promising functional materials for high-performance photodetectors. However, the toxicity of Pb and the lack of internal gain mechanism in typical perovskites significantly hinder their practical applications. Herein, a low-voltage and high-performance photodetector based on a single layer of lead-free Sn-based perovskite film is reported. The device shows broadband response from ultraviolet to near-infrared light with a responsivity up to 105 A W−1 and a high gain at a low operating voltage. The outstanding performance is attributed to the high hole mobility, p-doping nature, and excellent optoelectronic properties of the Sn-based perovskite. Moreover, the device is assembled on a flexible substrate and demonstrates both high sensitivity and good bending stability. This work demonstrates a route for realizing nontoxic, low-cost, and high-performance perovskite photodetectors with a simple device structure.

Original languageEnglish
Article number1900751
JournalAdvanced Science
Issue number17
Publication statusPublished - 4 Sep 2019


  • flexible electronics
  • gain
  • lead-free perovskites
  • photodetectors
  • responsivity

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Chemical Engineering(all)
  • Biochemistry, Genetics and Molecular Biology (miscellaneous)
  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)


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