Flexible, printable soft-X-Ray detectors based on all-inorganic perovskite quantum dots

Jingying Liu, Babar Shabbir, Chujie Wang, Tao Wan, Qingdong Ou, Pei Yu, Anton Tadich, Xuechen Jiao, Dewei Chu, Dongchen Qi, Dabing Li, Ruifeng Kan, Yamin Huang, Yemin Dong, Jacek Jasieniak, Yupeng Zhang, Qiaoliang Bao

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249 Citations (Scopus)


Metal halide perovskites represent a family of the most promising materials for fascinating photovoltaic and photodetector applications due to their unique optoelectronic properties and much needed simple and low-cost fabrication process. The high atomic number (Z) of their constituents and significantly higher carrier mobility also make perovskite semiconductors suitable for the detection of ionizing radiation. By taking advantage of that, the direct detection of soft-X-ray-induced photocurrent is demonstrated in both rigid and flexible detectors based on all-inorganic halide perovskite quantum dots (QDs) synthesized via a solution process. Utilizing a synchrotron soft-X-ray beamline, high sensitivities of up to 1450 µC Gyair−1 cm−2 are achieved under an X-ray dose rate of 0.0172 mGyair s−1 with only 0.1 V bias voltage, which is about 70-fold more sensitive than conventional α-Se devices. Furthermore, the perovskite film is printed homogeneously on various substrates by the inexpensive inkjet printing method to demonstrate large-scale fabrication of arrays of multichannel detectors. These results suggest that the perovskite QDs are ideal candidates for the detection of soft X-rays and for large-area flat or flexible panels with tremendous application potential in multidimensional and different architectures imaging technologies.

Original languageEnglish
Article number1901644
Number of pages8
JournalAdvanced Materials
Issue number30
Publication statusPublished - 26 Jul 2019


  • flexible and printable X-ray detectors
  • ionizing radiation
  • perovskites
  • quantum dots
  • soft X-rays

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