Recent advancements in using perovskite single crystals for gamma-ray detection

Zhang, Zheng; Yang, Ge

doi:10.1007/s10854-020-03519-z

Cited by 17 publications

(13 citation statements)

References 69 publications

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“…Recently, Cs 0.1 FA 0.9 PbI 2.8 Br 0.2 single crystals with μτ products as high as 1.2 × 10 –1 cm 2 V –1 have been reported . Such high values are even comparable to those of CdZnTe and CdZnTeSe single crystals at room temperature …”

Section: Working Mechanism Of X-ray Scintillators and Detectorsmentioning

confidence: 83%

“…100 Such high values are even comparable to those of CdZnTe and CdZnTeSe single crystals at room temperature. 101 As discussed above, detectors operated under high electric field conditions can improve the X-ray detection sensitivity. However, the balance between schubweg-limited sensitivity and noise-limited sensitivity should be considered because the high voltage bias usually induces a large dark current.…”

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confidence: 97%

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Metal Halide Perovskites for X-ray Imaging Scintillators and Detectors

et al. 2021

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Radiation detection, using materials to convert high-energy photons to low-energy photons (X-ray imaging) or electrical charges (X-ray detector), has become essential for a wide range of applications including medical diagnostic technologies, computed tomography, quality inspection and security, etc. Metal halide perovskite-based high-resolution scintillation-imaging screens or direct conversion detectors are promising candidates for such applications, because they have high absorption cross sections for X-rays due to their heavy atom (e.g., Pb2+, Bi3+, I–) compositions; moreover, these materials are solution-processable at low temperature, possessing tunable bandgaps, near-unity photoluminescence quantum yields, low trap density, high charge carrier mobility, and fast photoresponse. In this review, we explore and decipher the working mechanism of scintillators and direct conversion detectors as well as the key advantages of halide perovskites for both detection approaches. We further discuss the recent advancements in this promising research area, pointing out the remaining challenges and our perspective for future research directions toward perovskite-based X-ray applications.

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Section: Working Mechanism Of X-ray Scintillators and Detectorsmentioning

confidence: 83%

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confidence: 97%

Metal Halide Perovskites for X-ray Imaging Scintillators and Detectors

et al. 2021

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“…Lead-halide perovskites (LHPs) of an APbX 3 composition, where A is Cs, methylammonium (MA), or formamidinium (FA) and X = Cl, Br, I, or mixtures thereof, are compounds isostructural to diverse ABO 3 -type oxide perovskites. LHPs have recently become a major class of optoelectronic materials owing to their exceptional electronic and optical characteristics. − These materials are intensely pursued for applications in photovoltaics, − LCD technologies, − light-emitting diodes (LEDs), ,− lasers, − UV–vis–near-IR photodetectors, − direct conversion X-ray and gamma detectors, ,− and scintillators , and as emerging quantum light sources. , In these applications, LHPs are used in their diverse forms, as single crystals, thick or thin films, and colloidal nanocrystals (NCs, Figure a–f), which are easy to produce by means of solution-phase chemistry or low-temperature melt-growth. ,− The remarkable characteristics of these materials include long carrier lifetime–mobility products and low densities of electronic traps (on par with GaAs and CdTe) − despite the large concentrations of structural defects and the enhanced structure dynamics, a seeming paradox often referred to as defect tolerance. ,− Perovskite CsPbBr 3 gamma detectors exhibit energy resolution better than commercial CdTe-based detectors. ,,, Perovskite X-ray detectors and UV–vis detectors ,,…”

Section: Introduction To Lead-halide Perovskitesmentioning

confidence: 99%

Solid-State NMR and NQR Spectroscopy of Lead-Halide Perovskite Materials

2020

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Two-and three-dimensional lead-halide perovskite (LHP) materials are novel semiconductors that have generated broad interest owing to their outstanding optical and electronic properties. Characterization and understanding of their atomic structure and structure−property relationships are often nontrivial as a result of the vast structural and compositional tunability of LHPs as well as the enhanced structure dynamics as compared with oxide perovskites or more conventional semiconductors. Nuclear magnetic resonance (NMR) spectroscopy contributes to this thrust through its unique capability of sampling chemical bonding element-specifically ( 1/2 H, 13 C, 14/15 N, 35/37 Cl, 39 K, 79/81 Br, 87 Rb, 127 I, 133 Cs, and 207 Pb nuclei) and locally and shedding light onto the connectivity, geometry, topology, and dynamics of bonding. NMR can therefore readily observe phase transitions, evaluate phase purity and compositional and structural disorder, and probe molecular dynamics and ionic motion in diverse forms of LHPs, in which they can be used practically, ranging from bulk single crystals (e.g., in gamma and X-ray detectors) to polycrystalline films (e.g., in photovoltaics, photodetectors, and light-emitting diodes) and colloidal nanocrystals (e.g., in liquid crystal displays and future quantum light sources). Herein we also outline the immense practical potential of nuclear quadrupolar resonance (NQR) spectroscopy for characterizing LHPs, owing to the strong quadrupole moments, good sensitivity, and high natural abundance of several halide nuclei ( 79/81 Br and 127 I) combined with the enhanced electric field gradients around these nuclei existing in LHPs as well as the instrumental simplicity. Strong quadrupole interactions, on one side, make 79/81 Br and 127 I NMR rather impractical but turn NQR into a high-resolution probe of the local structure around halide ions.

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“…In recent years, blends of organic polymer and heavy inorganic nanoparticles, quantum dots or perovskite have been proposed to overcome such issues [ 14 , 17 , 18 , 19 ]. Lead [ 13 , 20 , 21 , 22 , 23 , 24 ] (Pb, Z = 82) is the most widely used X-ray absorbing material commercially, such as a lead chamber or other lead-containing protective clothing. However, long-term exposure to lead or its salts (such as lead oxide (PbO) and lead iodide (PbI 2 )) may cause accumulation of heavy metals in the body, which may lead to serious health problems, such as neuron disease and kidney failure [ 2 ].…”

Section: Introductionmentioning

confidence: 99%

A High-Sensitivity Flexible Direct X-ray Detector Based on Bi2O3/PDMS Nanocomposite Thin Film

Mao

Chen

et al. 2021

Nanomaterials

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The characteristics of mechanical flexibility, low health risk, and simple processing of polymer nanocomposite materials make them potentially applicable as flexible X-ray detectors. In this study, we report on a high sensitivity, environmentally friendly, and flexible direct X-ray detector using polymer nanocomposite material consisting of bismuth oxide (Bi2O3) nanoparticles and polydimethylsiloxane (PDMS). This detector was realized by printing patterned Ag electrodes on the polymer nanocomposite material. The response of PDMS to X-rays was verified for the first time, and the effect of doping different contents of Bi2O3 nanoparticles on the performance of the device was tested. The optoelectronic performance of the optimized detector indicated a high sensitivity (203.58 μC Gyair−1 cm−2) to low dose rate (23.90 μGyair s−1) at a 150 V bias voltage and the X-ray current density (JX-ray) was 10,000-fold higher than the dark current density (Jdark). The flexible direct X-ray detector could be curled for 10,000 cycles with slight performance degradation. The device exhibited outstanding stability after storage for over one month in air. Finally, this device provides new guidance for the design of high-performance flexible direct X-ray detectors.

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Recent advancements in using perovskite single crystals for gamma-ray detection

Cited by 17 publications

References 69 publications

Metal Halide Perovskites for X-ray Imaging Scintillators and Detectors

Metal Halide Perovskites for X-ray Imaging Scintillators and Detectors

Solid-State NMR and NQR Spectroscopy of Lead-Halide Perovskite Materials

A High-Sensitivity Flexible Direct X-ray Detector Based on Bi2O3/PDMS Nanocomposite Thin Film

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