Abstract
In this chapter, the fundamental principles of high-energy radiation detection and recent progress in the emerging field of metal halide perovskite (MHP)-based direct and indirect X-ray and γ-ray detectors are discussed. The chapter first introduces the underlying principles of high-energy radiation detection, with emphasis on the key performance metrics. This is followed by a comprehensive summary of the recent progress made in the field of perovskite-based radiation detector technologies. Finally, the chapter ends with an overview of current issues and future perspectives on MHP-based direct and indirect (scintillators) radiation detector technologies.
Highlights
Key to this is the ability of Metal halide perovskites (MHPs) to accommodate heavy elements while being able to form large, high-quality crystals and polycrystalline layers, making them one of the most promising emerging X-ray and γ-ray detector the cuboctahedral cavity formed by nearestneighbor X atoms in an AX12 polyhedron.[5]
We aim to provide the reader first with an introduction to the basic principles of high-energy radiation detection, and second, with a critical review of the progress achieved to date in the rapidly advancing area of X-ray and γ-ray detectors based on MHPs
The resulting crystals were of high quality as verified by X-ray diffraction (XRD) measurements, while capacitance–frequency (C–f) measurements highlighted the presence of a low trap density of 1.4 × 1010 cm−3, which is comparable to 3D MHPs (1010–1013 cm−3)[108] and significantly lower than commercial inorganic materials (1015–1016 cm−3).[108,109]
Summary
There are two primary types of high-energy radiation detectors and are classified depending on the detection principle: I) direct detectors, and II) indirect detectors.[52]. Direct detectors rely on photoconductive materials that are sensitive to particular high energy radiation. Indirect detectors employ scintillator materials that convert, in energy, the absorbed high energy X-rays (0.1–100 keV) or γ-rays (0.1–10 MeV) (Figure 2) to ultraviolet light (UV) or visible (vis), which is subsequently detected by standard photodiode/array.[53–55]. We aim to provide the reader first with an introduction to the basic principles of high-energy radiation detection, and second, with a critical review of the progress achieved to date in the rapidly advancing area of X-ray and γ-ray detectors based on MHPs. Technologies covered include direct and indirect high-energy photon detectors, with emphasis on the
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