Singlet Fission-Based High-Resolution X-Ray Imaging Scintillation Screens

Jian Xin Wang, Jun Yin, Luis Gutiérrez-Arzaluz, Simil Thomas, Wenyi Shao, Husam N. Alshareef, Mohamed Eddaoudi, Osman M. Bakr, Omar F. Mohammed*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

X-ray imaging technology is critical to numerous different walks of daily life, ranging from medical radiography and security screening all the way to high-energy physics. Although several organic chromophores are fabricated and tested as X-ray imaging scintillators, they generally show poor scintillation performance due to their weak X-ray absorption cross-section and inefficient exciton utilization efficiency. Here, a singlet fission-based high-performance organic X-ray imaging scintillator with near unity exciton utilization efficiency is presented. Interestingly, it is found that the X-ray sensitivity and imaging resolution of the singlet fission-based scintillator are dramatically improved by an efficient energy transfer from a thermally activated delayed fluorescence (TADF) sensitizer, in which both singlet and triplet excitons can be efficiently harnessed. The fabricated singlet fission-based scintillator exhibits a high X-ray imaging resolution of 27.5 line pairs per millimeter (lp mm−1), which exceeds that of most commercial scintillators, demonstrating its high potential use in medical radiography and security inspection.

Original languageEnglish (US)
Article number2300406
JournalAdvanced Science
Volume10
Issue number19
DOIs
StatePublished - Jul 6 2023

Keywords

  • energy transfer
  • high-resolution X-ray imaging scintillator
  • singlet fission

ASJC Scopus subject areas

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

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