Stable perovskite single-crystal X-ray imaging detectors with single-photon sensitivity

Abstract A major thrust of medical X-ray imaging is to minimize the X-ray dose acquired by the patient, down to single-photon sensitivity. Such characteristics have been demonstrated with only a few direct-detection semiconductor materials such as CdTe and Si; nonetheless, their industrial deployment in medical diagnostics is still impeded by elaborate and costly fabrication processes. Hybrid lead halide perovskites can be a viable alternative owing to their facile solution growth. However, hybrid perovskites are unstable under high-field biasing in X-ray detectors, owing to structural lability and mixed electronic–ionic conductivity. Here we show that both single-photon-counting and long-term stable…

• GS
  Greatcell Solar Limited
• ET
  Eidgenössische Technische Hochschule Zürich
• KA
  King Abdullah University of Science and Technology
• PS
  Paul Scherrer Institut
• I-
  Innosuisse - Schweizerische Agentur für Innovationsförderung