Enhanced X-ray photon response in solution-synthesized CsPbBr3 nanoparticles wrapped by reduced graphene oxide

Liu, Xiangming; Xu, Tao; Li, Yulong; Zang, Zhigang; Peng, Xiaoshi; Wei, Huiyue; Zha, Weiyi; Wang, Feng

doi:10.1016/j.solmat.2018.08.009

Cited by 274 publications

(80 citation statements)

References 32 publications

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“…Compared with hybrid organic–inorganic perovskite, the all‐inorganic perovskite material without organic components is more stable . Based on this characteristic, lots of researches have been made in all‐inorganic perovskite material, particularly in CsPbBr 3 . According to the basic requirements of radiation detector, the CsPbBr 3 films must have an adequate thickness (>10 µm) .…”

Section: Comparison Of the Relevant Device Parameters Of The X‐ray Dementioning

confidence: 99%

Self‐Powered X‐Ray Detector Based on All‐Inorganic Perovskite Thick Film with High Sensitivity Under Low Dose Rate

Gou

Huanglong

et al. 2019

Physica Rapid Research Ltrs

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Hybrid perovskite materials have been one of the brightest spotlights in the radiation detection research fields due to their higher carrier mobility and lower trap state density in recent years. In this paper, the CsPbBr3 microcrystal thick film is successfully prepared using a low‐cost facile solution synthesis method. The properties of samples are characterized by field‐emission scanning electron microscope (FE‐SEM), X‐ray diffraction (XRD), and UV‐vis diffuse reflectance spectrum (UV‐vis DRS). In addition, X‐ray detectors based on the CsPbBr3 microcrystal thick film are fabricated and the photoelectric properties of the detectors are further improved through the multiple‐times dissolution–recrystallization method. An improved sensitivity of 470 µC Gyair−1 cm−2 is obtained for X‐ray photodetector based on recrystallized CsPbBr3 microcrystal thick film at zero bias under a remarkably low dose rate (0.053 µGyair s−1). This sensitivity is over 20 times higher than that of α‐Se X‐ray detectors working at a much higher field of 10 V µm−1. The current investigation can provide an efficient low‐cost and facile method to fabricate self‐powered X‐ray detectors based on CsPbBr3 microcrystal thick film that work normally at low radiation dose rate.

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Section: Comparison Of the Relevant Device Parameters Of The X‐ray Dementioning

confidence: 99%

Self‐Powered X‐Ray Detector Based on All‐Inorganic Perovskite Thick Film with High Sensitivity Under Low Dose Rate

Gou

Huanglong

et al. 2019

Physica Rapid Research Ltrs

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“…CsPbBr 3 : Limited temporal resolution, expensive fabrication, nonuniform sensing areas, and poor stability are some of the remaining challenges that both inorganic and hybrid MHP-based X-ray sensors face. To address these issues, Liu et al [94] used CsPbBr 3 nanoparticles (CsPbBr 3 NPs) 12 nm in diameter, to decorate reduced graphene oxide (rGO), which was the deployed as the composite X-ray sensing element (Figure 9). The combination of rGO's bipolar transporting characteristics sensitized to X-ray photons by the CsPbBr 3 resulted in devices with improved response times.…”

Section: D Perovskitesmentioning

confidence: 99%

Metal Halide Perovskites for High‐Energy Radiation Detection

et al. 2020

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Metal halide perovskites (MHPs) have emerged as a frontrunner semiconductor technology for application in third generation photovoltaics while simultaneously making significant strides in other areas of optoelectronics. Photodetectors are one of the latest additions in an expanding list of applications of this fascinating family of materials. The extensive range of possible inorganic and hybrid perovskites coupled with their processing versatility and ability to convert external stimuli into easily measurable optical/electrical signals makes them an auspicious sensing element even for the high-energy domain of the electromagnetic spectrum. Key to this is the ability of 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-ray detector technologies. Here, the fundamental principles of high-energy radiation detection are reviewed with emphasis on recent progress in the emerging and fascinating field of metal halide perovskite-based X-ray and-ray detectors. The review starts with a discussion of the basic principles of high-energy radiation detection with focus on key performance metrics followed by a comprehensive summary of the recent progress in the field of perovskite-based detectors. The article concludes with a discussion of the remaining challenges and future perspectives.

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“…Graphene -the first and the smallest two-dimensional atomic crystal -attracted much attention to scientific research in the field of optoelectronics, used in many applications including photoluminescence bio-imaging [4], X-ray photon detection [5], photo-catalytic activities [6], photoconductive switching [7]. Graphene quantum dot (GQD) is a 0D nanomaterial that contains small pieces of few-layer graphene [8].…”

Section: Introductionmentioning

confidence: 99%

Optical graphene quantum dots gas sensors: experimental study

Raeyani

Shojaei

Ahmadi-Kandjani

2020

Mater. Res. Express

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We present a room temperature Graphene Quantum Dots (GQDs) based optical gas sensor for carbon dioxide gas detection. GQDs were prepared by a hydrothermal method and deposited on a quartz substrate using a drop-casting technique. The size of synthesized GQDs is in the range of 10 to 20 nm. GQDs films were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), atomic force microscopy (AFM), photoluminescence (PL) and UV-Vis absorption spectroscopy. The gas sensing measurements were studied using optical absorbance changes of GQDs film upon exposure to different concentrations of CO 2 gas. The as-prepared gas sensor showed a significant sensitivity with a partially reversible response to CO 2 gas, indicating its great potential to pave a way toward a novel CO 2 gas sensor.

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Enhanced X-ray photon response in solution-synthesized CsPbBr3 nanoparticles wrapped by reduced graphene oxide

Cited by 274 publications

References 32 publications

Self‐Powered X‐Ray Detector Based on All‐Inorganic Perovskite Thick Film with High Sensitivity Under Low Dose Rate

Self‐Powered X‐Ray Detector Based on All‐Inorganic Perovskite Thick Film with High Sensitivity Under Low Dose Rate

Metal Halide Perovskites for High‐Energy Radiation Detection

Optical graphene quantum dots gas sensors: experimental study

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