Affiliation:
1. Key Laboratory of Optoelectronic Technology & Systems (Ministry of Education), Chongqing University 1 , Chongqing 400044, People's Republic of China
2. Department of Physics and Astronomy, College of Sciences, King Saud University 2 , P.O. Box 2455, Riyadh 11451, Saudi Arabia
Abstract
Flat-panel x-ray scintillators with a high spatial resolution at a low radiation dose rate are desirable for efficient imaging applications in medical diagnostics, security inspection, and nondestructive inspection. To promote the progress of x-ray imaging technologies, it is of great interest to explore transparent scintillators with reduced light scattering, high light yields, and uniform radioluminescence. Herein, we design and prepare a novel lead-free (C12H28N)2Cu2I4 metal halide featuring a high luminescent efficiency and white emission benefiting from the double self-trapped exciton mechanism, which enable to not only match the response of semiconductor-based sensors but also enhance light yields and decrease exposed doses to objects. Furthermore, transparent, and flexible scintillators with large areas of 20.25 cm2 demonstrate an outstanding scintillation performance including a high spatial resolution of 19.8 lp mm−1 and an ultralow detection limit of 28.39 nGyair s−1, which are ∼4 times higher and 194 times lower than typical values for medical imaging, respectively. This work provides not only a new route to explore promising alternatives with broadband emission but also a novel opportunity to develop flexible x-ray imaging technology.
Funder
Young Elite Scientists Sponsorship Program by CAST
Postdoctoral Science Foundation of China
Deputy for Research and Innovation, Ministry of Education in Saudi Arabia
National Natural Science Foundation of China
the Open Foundation of State Key Laboratory of Electronic Thin Films and Integrated Devices
Cited by
15 articles.
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