Efficient and Reabsorption‐Free Radioluminescence in Cs 3 Cu 2 I 5 Nanocrystals with Self‐Trapped Excitons

Abstract Radioluminescent materials (scintillators) are widely applied in medical imaging, nondestructive testing, security inspection, nuclear and radiation industries, and scientific research. Recently, all‐inorganic lead halide perovskite nanocrystal (NC) scintillators have attracted great attention due to their facile solution processability and ultrasensitive X‐ray detection, which allows for large area and flexible X‐ray imaging. However, the light yield of these perovskite NCs is relatively low because of the strong self‐absorption that reduces the light out‐coupling efficiency. Here, NCs with self‐trapped excitons emission are demonstrated to be sensitive, reabsorption‐free scintillators. Highly…

• NN
  National Natural Science Foundation of China

  Awards: 61974052, 2019012, 21833009, 11774239, 51835005, 61827815
• HU
  Huazhong University of Science and Technology
• NS
  Natural Science Foundation of Hubei Province

  Award: 2017CFB417
• SU
  Shenzhen University

  Award: 2019012
• ST
  Science, Technology and Innovation Commission of Shenzhen Municipality

  Awards: JCYJ20190809180013252, JCYJ20170818093035338, JCYJ20190809180013252, JCYJ20170818093035338
• FR
  Fundamental Research Funds for the Central Universities

  Award: 2017KFYXJJ039