Chinese Optics Letters, Volume. 20, Issue 6, 063401(2022)

Perovskite-quantum-dots activated silica fiber X-ray dosimeter

Author Affiliations
• 1Key Laboratory of In-fiber Integrated Optics, Ministry of Education, Harbin Engineering University, Harbin 150001, China
• 2State Key Laboratory of Particle Detection and Electronics, University of Science and Technology of China, Hefei 230026, China
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A new type of X-ray fiber dosimeters is proposed that is based on the X-ray response of $CsPbBr3$ perovskite-quantum-dots (PQDs) activated silica fiber. Such a fiber sensor is constructed by covering a multimode silica fiber with PQDs embedded glass powders using a transparent high-temperature glue. Under X-ray irradiation, the fiber sensor emits bright green light at 525 nm, which can be readily recorded by a CCD spectrometer. The integrated radioluminescence intensity has an excellent linear response to the X-ray dose. Study is given to the fiber sensor concerning its thermal stability in a temperature range of room temperature up to 300°C, resistance to water erosion, and prolonged X-ray irradiation. The results verify that the proposed fiber sensor has the advantages of good thermal stability, chemical durability, and radiation hardness. The studied X-ray fiber sensor holds promise to be used in a real-time, in-situ, and remote radiation dose monitoring.

Keywords

1. Introduction

X-ray detection technologies have played a crucial role in the fields of medical radiography, non-destructive inspection, high-energy physics research, etc.[13]. At present, the X-ray detectors are mainly based on semiconductors and scintillators[4,5]. The semiconductors are extremely sensitive to X-rays and can directly convert X-ray photons into electrons that are collected and read out by an electric circuit. The practical uses of semiconductors, however, are susceptible to electronic interference and sensitivity to temperature. In the case of scintillator-based detectors, X-rays are first converted into visible light by the scintillator [known as radioluminescence (RL)], and then the ultraviolet (UV) or visible light is read out by a photodiode, CCD camera, or photomultiplier tube (PMT). In many cases, the radiation environment is extremely harsh and difficult to access as a result of high temperature, hazardous chemicals, electromagnetic interference, and strong radiation effects—all urgently ask for flexible and remote detection[6,7].

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Yuqing Xie, Yue Jing, Luyue Niu, Ci Wang, Lei Zhao, Jing Ren, Jianzhong Zhang. Perovskite-quantum-dots activated silica fiber X-ray dosimeter[J]. Chinese Optics Letters, 2022, 20(6): 063401

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Category: X-ray Optics