Searching for High-Quality Halide Perovskite Single Crystals toward X-ray Detection

Pan, Zhengwei; Wei, Long; Jiang, Jinchi; Shen, Liang; Yao, Kai

doi:10.1021/acs.jpclett.2c00450

Cited by 28 publications

(33 citation statements)

References 85 publications

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“…These bismuth-based halide perovskite SCs have lower biological toxicity, greater thermal and moisture stability, large dark resistivity, and higher activation energy for ionic conduction, which makes them potential candidates for X-ray detection. However, their nucleation and crystal growth is more challenging to manage than the lead-based perovskites. − Therefore, preparing good quality Bi-based perovskite crystals having a large resistivity and high μτ product for X-ray detection applications is challenging.…”

Section: Introductionmentioning

confidence: 99%

Self-Powered X-ray Detection and Imaging using Cs₂AgBiCl₆ Lead-Free Double Perovskite Single Crystal

Tailor

Ghosh

Afroz

et al. 2022

ACS Appl. Electron. Mater.

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Despite the high performance of lead-halide perovskite-based X-ray detectors, the toxicity and instability of lead require the development of lead-free perovskites for X-ray detection applications. Here, we demonstrate lead-free and environmentally friendly, all-inorganic millimeter-sized Cs2AgBiCl6 double perovskite single crystal (SC) for X-ray detection and imaging. The high dark resistivity (3.1 × 1010 Ω cm), high carrier mobility-lifetime product (5.36 × 10–4 cm2 V–1), and lower trap density (1.18 × 109 cm–3) in these double perovskite SCs render them a potential material for X-ray detection. The fabricated vertical structured X-ray detector exhibits a sensitivity of 325.78 μC Gy air–1 cm–2 and a limit of detection of 241 nGy s–1. Additionally, the Cs2AgBiCl6 SCs exhibit self-powered X-ray detection at zero bias with a sensitivity of 7 μC Gy air–1 cm–2. Moreover, the fabricated perovskite X-ray detector exhibits a stable and robust performance under continuous X-ray irradiation and long-term ambient storage. Further, we demonstrated the imaging capability of the Cs2AgBiCl6 X-ray detector using a metal test object and obtained a distortion-free image. Our findings demonstrate that the Cs2AgBiCl6 single crystal-based X-ray detectors have great potential as practical X-ray detectors and imaging for medical radiography.

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Section: Introductionmentioning

confidence: 99%

Self-Powered X-ray Detection and Imaging using Cs₂AgBiCl₆ Lead-Free Double Perovskite Single Crystal

Tailor

Ghosh

Afroz

et al. 2022

ACS Appl. Electron. Mater.

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“…[ 34 ] Ultimately, dark current values are too large to achieve high‐quality images, with high resolution and contrast for accurate diagnosis. [ 41 ] Therefore, it is essential to obtain high dark resistivity through further progress in material composition engineering and device architecture. Also crucial is to achieve a deep understanding on how ion migration governs the electronic current for the long‐term operational stability of the detector.…”

Section: Introductionmentioning

confidence: 99%

Effective Ion Mobility and Long‐Term Dark Current of Metal Halide Perovskites with Different Crystallinities and Compositions

García-Batlle

Deumel

Huerdler

et al. 2022

Advanced Photonics Research

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Perovskites have been explored in almost all fields of material science. [1,2] Considerable efforts have been made on examining the causes of hysteresis in the current-voltage curves, [3][4][5] the nature of charge traps, defects, [6,7] grain boundaries, [8] origins of ion migration, [9][10][11] not only in the field of solar cells and light emitters devices, [12] but also as key materials in fuel cells [13] and electrodes for water electrolyzers. [14] By tailoring the composition of the perovskite compounds, a variety of physical properties appears, such as ferroelectric, [15] dielectric, piezoelectric, magnetic, [16] catalytic, [17] photovoltaic, electronic-ionic-conduction, [18] and superconducting properties. [19] Recently, metal halide perovskite (HP) materials have been successfully used in X-ray imaging and ionizing radiation detectors. [20,21] The chemical formula APbX 3 (where A is a cation and X is the halide anion) comprises reasonably high Z elements, which are helpful to stop high-energy radiation photons. HPs exhibit the so-called defect tolerance which is connected to the transport properties allowing to maximize the product of the charge mobility and carrier lifetime by minimizing the bulk/surface defect density. [22][23][24] Furthermore, direct semiconductor radiation detectors based on Pb-HPs can be grown and processed in solution at relatively low temperatures and from low-cost basic raw materials. [25,26] Fast and efficient detection of hard X-and γ-ray with high energy resolution is critical for medical and industrial applications. [27] The direct conversion X-ray detectors transform the incident X-ray photons directly into electrical signals, and present an advantage in terms of high spatial resolution in comparison to indirect detectors such as CsI. [28] Besides optimization in material composition and device architecture, the conventional direct detectors, such as amorphous selenium (α-Se), [29] suffer from their low mobility-lifetime (μτ) product and small atomic number which limit their sensitivity. [24,30] In contrast, HPs exhibit large μτ-product and strong stopping power. However, the persistent drawback of ion migration results in deleterious and unstable dark current. [31][32][33] In fact, induced dark current and also

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“…The uniform, large area perovskite films with a size of 400 cm 2 and thickness of millimeters are prepared, which retain the flexibility of the nylon membrane. However, the perovskite films suffer from 2 orders of magnitude larger dark current compared to a -Se . Recently, they constructed perovskite films with heterojunction structure by laminating several membrane films with different perovskite compositions .…”

Section: Evolution Of Materials Structuresmentioning

confidence: 99%

“…However, the perovskite films suffer from 2 orders of magnitude larger dark current compared to a-Se. 165 Recently, they constructed perovskite films with heterojunction structure by laminating several membrane films with different perovskite compositions. 288 As shown in Figure 15k, the heterojunction films with a thickness of 520 μm consist of five layers of Cs 0.15 FA 0.85 PbI 3 -filled and a layer of Cs 0.15 FA 0.85 Pb(I 0.15 Br 0.85 ) 3 filled-nylon membranes, which exhibit a composition gradient forming a gradient of different bandgaps.…”

Section: Perovskite Polycrystalline Filmsmentioning

confidence: 99%

Recent Development of Halide Perovskite Materials and Devices for Ionizing Radiation Detection

Deng

Ouyang

et al. 2023

Chem. Rev.

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Ionizing radiation such as X-rays and γ-rays has been extensively studied and used in various fields such as medical imaging, radiographic nondestructive testing, nuclear defense, homeland security, and scientific research. Therefore, the detection of such highenergy radiation with high-sensitivity and low-cost-based materials and devices is highly important and desirable. Halide perovskites have emerged as promising candidates for radiation detection due to the large light absorption coefficient, large resistivity, low leakage current, high mobility, and simplicity in synthesis and processing as compared with commercial silicon (Si) and amorphous selenium (a-Se). In this review, we provide an extensive overview of current progress in terms of materials development and corresponding device architectures for radiation detection. We discuss the properties of a plethora of reported compounds involving organic−inorganic hybrid, all-inorganic, all-organic perovskite and antiperovskite structures, as well as the continuous breakthroughs in device architectures, performance, and environmental stability. We focus on the critical advancements of the field in the past few years and we provide valuable insight for the development of next-generation materials and devices for radiation detection and imaging applications.

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Searching for High-Quality Halide Perovskite Single Crystals toward X-ray Detection

Cited by 28 publications

References 85 publications

Self-Powered X-ray Detection and Imaging using Cs₂AgBiCl₆ Lead-Free Double Perovskite Single Crystal

Self-Powered X-ray Detection and Imaging using Cs₂AgBiCl₆ Lead-Free Double Perovskite Single Crystal

Effective Ion Mobility and Long‐Term Dark Current of Metal Halide Perovskites with Different Crystallinities and Compositions

Recent Development of Halide Perovskite Materials and Devices for Ionizing Radiation Detection

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Searching for High-Quality Halide Perovskite Single Crystals toward X-ray Detection

Cited by 28 publications

References 85 publications

Self-Powered X-ray Detection and Imaging using Cs2AgBiCl6 Lead-Free Double Perovskite Single Crystal

Self-Powered X-ray Detection and Imaging using Cs2AgBiCl6 Lead-Free Double Perovskite Single Crystal

Effective Ion Mobility and Long‐Term Dark Current of Metal Halide Perovskites with Different Crystallinities and Compositions

Recent Development of Halide Perovskite Materials and Devices for Ionizing Radiation Detection

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Product

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Self-Powered X-ray Detection and Imaging using Cs₂AgBiCl₆ Lead-Free Double Perovskite Single Crystal

Self-Powered X-ray Detection and Imaging using Cs₂AgBiCl₆ Lead-Free Double Perovskite Single Crystal