Transparent Medium Embedded with CdS Quantum Dots for X-Ray Imaging

摘要

Scintillators, converting the absorbed high-energy X-ray photons into to visible ones, have been used in fields as medical diagnostics, radiation dosimetry, and security inspection. Commercial bulk scintillators generally suffer from time-consuming production, high-cost operation, and deteriorated performance especially exposed to humidity. Here, in situ precipitated CdS quantum dots (QDs) within the transparent glass matrix are achieved feasibly. The CdS QDs glass-ceramic (GC) is explored to be a superior scintillator with an outstanding weather resistance. A profound radioluminescence behavior and long-term (approximate to 3600 s) stability under X-ray irradiation of the scintillator with the dose rate of 1 mGy(air) s(-1) are demonstrated. Moreover, the indirect X-ray imaging of the CdS GC reaches excellent resolution of 10 lp mm(-1). Furthermore, the damaged scintillator under a long-term cumulative dose up to 288 Gy(air) is recovered via a subsequent thermal treatment. Herein, the explored scintillator of CdS GC executes a promising cost-effective X-ray imaging for long-term operation of the corresponding optoelectronic devices.