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Indirect X-ray Detectors Based on Inkjet-Printed Photodetectors with a Screen-Printed Scintillator Layer.

Juliana Oliveira1,2, Vitor Correia1,2, Enrico Sowade

  • 1Centro de Física , Universidade do Minho , 4710-057 Braga , Portugal.

ACS Applied Materials & Interfaces
|March 28, 2018
PubMed
Summary

Inkjet-printed organic photodetectors (PDs) show promise for X-ray detection. Adding a scintillator film significantly increased photocurrent, proving their suitability for flexible X-ray imaging applications.

Keywords:
X-ray imaginginkjetorganic photodetectorsprinted photodetectorsradiation detectors

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Area of Science:

  • Organic electronics
  • Printed sensor technology
  • X-ray imaging

Background:

  • Organic photodetectors (PDs) offer potential for large-area, flexible applications in medical imaging, security, and quality control.
  • Inkjet printing enables the digital deposition of functional materials for creating electronic devices on diverse substrates.

Purpose of the Study:

  • To develop and assess inkjet-printed PD arrays for indirect X-ray radiation detection.
  • To utilize a scintillator ink as an X-ray absorber in conjunction with printed PDs.

Main Methods:

  • Fabrication of PD arrays using inkjet printing technology.
  • Integration of a scintillator ink layer on top of the printed PDs.
  • Measurement of photocurrent changes under X-ray exposure with and without the scintillator.

Main Results:

  • The developed inkjet-printed PD arrays demonstrated functionality for X-ray detection.
  • The photocurrent of the PDs increased by over 90% when a scintillator film was used.
  • Photocurrent rose from approximately 53 nA without the scintillator to about 102 nA with the scintillator.

Conclusions:

  • Inkjet-printed organic photodetectors integrated with scintillator inks are suitable for indirect X-ray detection.
  • This technology enables the development of flexible and large-area X-ray imaging systems.
  • The significant photocurrent enhancement validates the potential of these printed devices for practical X-ray applications.