Efficient and Reabsorption‐Free Radioluminescence in Cs3Cu2I5 Nanocrystals with Self‐Trapped Excitons

Lian, Linyuan; Zheng, Moyan; Zhang, Weizhuo; Yin, Liuguo; Du, Xiaolong; Zhang, Peng; Zhang, Xiuwen; Gao, Jianbo; Zhang, Daoli; Gao, Liang; Niu, Guangda; Song, Haisheng; Chen, Rong; Lan, Xinzheng; Tang, Jiang; Zhang, Jianbing

doi:10.1002/advs.202000195

Cited by 331 publications

(228 citation statements)

References 59 publications

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“…As shown in Fig. 2c , the light yield of (C 38 H 34 P 2 )MnBr 4 is comparable to those of recently reported lead-free metal halides, such as Cs 3 Cu 2 I 5 (79,279 photon MeV −1 ) 43 and Rb 2 CuBr 3 (91,056 photon MeV −1 ) 33 , and much better than those of Rb 2 CuCl 3 (16,600 photon MeV −1 ) 34 , widely investigated CsPbBr 3 nanocrystals (21,000 photon MeV −1 ) 22 , and many commercially available scintillators, such as CsI:Tl (54,000 photon MeV −1 ) and CdWO 4 (28,000 photon MeV −1 ). Moreover, based on the toxicity classification (health and environment) information of metal halides from material safety data sheet, (C 38 H 34 P 2 )MnBr 4 is believed to be significantly less toxic than existing scintillators mentioned above.…”

Section: Resultssupporting

confidence: 86%

“…The intensity decreased to the background level in 10 ms after the cease of the excitation source, indicating the suitability for high contrast imaging. The excellent performance of X-ray imaging could be attributed to the negligible self-absorption, high PLQE, light yield, and low detection limit of (C 38 H 34 P 2 )MnBr 4 33,34,43,44 . Flexible devices have received tremendous attention nowadays for their good foldability, high crack resistance, favorable compatibility, and potential application in portable and wearable devices.…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Highly efficient eco-friendly X-ray scintillators based on an organic manganese halide

et al. 2020

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Scintillation based X-ray detection has received great attention for its application in a wide range of areas from security to healthcare. Here, we report highly efficient X-ray scintillators with stateof-the-art performance based on an organic metal halide, ethylenebis-triphenylphosphonium manganese (II) bromide ((C 38 H 34 P 2)MnBr 4), which can be prepared using a facile solution growth method at room temperature to form inch sized single crystals. This zero-dimensional organic metal halide hybrid exhibits green emission peaked at 517 nm with a photoluminescence quantum efficiency of~95%. Its X-ray scintillation properties are characterized with an excellent linear response to X-ray dose rate, a high light yield of~80,000 photon MeV −1 , and a low detection limit of 72.8 nGy s −1. X-ray imaging tests show that scintillators based on (C 38 H 34 P 2)MnBr 4 powders provide an excellent visualization tool for X-ray radiography, and high resolution flexible scintillators can be fabricated by blending (C 38 H 34 P 2)MnBr 4 powders with polydimethylsiloxane.

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Section: Resultssupporting

confidence: 86%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Highly efficient eco-friendly X-ray scintillators based on an organic manganese halide

et al. 2020

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“…During the past decades, mechanoluminescent materials with the capability of converting mechanical energy to light emission are attracting more and more attention for their potential applications in stress sensing, anti-counterfeiting, display, structure fatigue diagnosis, and flexible optoelectronics (Chandra and Chandra, 2011 ; Jeong et al, 2014 ; Liu et al, 2019 ; Wang C. et al, 2019 ; Wang X. et al, 2019 ; Zuo et al, 2019 ; Wang et al, 2020 ). On the other hand, almost immediately after the discovery of X-rays, people started eagerly to find efficient X-ray phosphors or scintillators that absorb X-ray and emit light (Blasse, 1994 ; Büchele et al, 2015 ; Chen et al, 2018 ; Lian et al, 2020 ). With a strong ability to absorb X-ray photons, impurity-doped ML materials may also be good scintillators with intense X-ray-induced emission and find their application in X-ray detection.…”

Section: Introductionmentioning

confidence: 99%

Luminescence in Manganese (II)-Doped SrZn2S2O Crystals From Multiple Energy Conversion

Mao

Wang

et al. 2020

Front. Chem.

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Under the excitation of ultraviolet, X-ray, and mechanical stress, intense orange luminescence (Mn 2+ , 4 T 1 → 6 A 1) can be generated in Mn 2+-doped SrZn 2 S 2 O crystal in orthorhombic space group of Pmn2 1. Herein, the multiple energy conversion in SrZn 2 S 2 O:Mn 2+ , that is, photoluminescence (PL), X-ray-induced luminescence, and mechanoluminescence, is investigated. Insight in luminescence mechanisms is gained by evaluating the Mn 2+ concentration effects. Under the excitation of metal-to-ligand charge-transfer transition, the most intense PL is obtained. X-ray-induced luminescence shows similar features with PL excited by band edge UV absorption due to the same valence band to conduction band transition nature. Benefiting much from trap levels introduced by Mn 2+ impurities, the quenching behavior mechanoluminescence is more like the directly excited PL from Mn 2+ d-d transitions. Interestingly, this concentration preference leads to varying degrees of spectral redshift in each mode luminescence. Further, SrZn 2 S 2 O:Mn 2+ exhibits a good linear response to the excitation power, which makes it potential candidates for applications in X-ray radiation detection and mechanical stress sensing.

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“…In recent years, perovskite materials with excellent photoelectric properties have been proved to be potential scintillator materials. [ 124–128 ] In this chapter, we review perovskite and their applications in detectors and imaging from single crystals (SCs), 2D and nanocrystals (NCs)/quantum dots (QDs), and their characteristics are listed in Table 2 .…”

Section: Scintillator Materialsmentioning

confidence: 99%

Halide Perovskite, a Potential Scintillator for X‐Ray Detection

et al. 2020

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the coincidence efficiency. This indicates that the solid angle controlled by the PET system and the efficiency of the intrinsic detector are greater. [11,12] More significantly, the Compton events in the pulse height spectrum are mainly caused by scattering in the scintillator. Therefore, these deficiencies can be avoided by lowering the threshold. However, the signal provided by Compton scattering quanta in adjacent crystals may be higher than the threshold, and thus may affect the position resolution and make it worse. In X-ray computed tomography (CT), the body is mainly irradiated continuously from multiple directions by fan-shaped X-rays, while attenuation profiles are recorded, and finally reconstructed from the cross-sectional view of the body. [13] This technology mainly uses complex scanning methods in the field of clinical practice. At present, the realized way of X-rays detector can be roughly divided into two types, direct and indirect. The former one directly absorbs incident X-rays, generates electronic signals through semiconductors or engenders chemical signals through thin films. [14-17] This method can directly convert X-rays into visible light without going through other processes. Therefore, an X-ray detector with a wide linear response range, fast pulse rise time, high-energy resolution, and spatial resolution can be obtained, which makes it copiously applied in X-ray detection. [18-21] However, X-ray detectors based on semiconductors face the challenges of high cost and low efficiency. In addition, although the film is cheap, it is difficult to apply in digital form, which may limit its further development. The latter one refers to the conversion of X-rays (in the highenergy radiation, in addition to X-rays, α, β, and γ rays are also included) into ultraviolet visible (UV) light through scintillators which can be further captured by optical devices. [22-24] It consists of a scintillator and an array photodiode (PD). In contrast, since the scintillator that converts X-rays indirectly is cheap, it is easier to implement in the industry than direct detectors, and has the characteristics of low cost and abundant options, stability, and flexible conversion rate. [25,26] At present, indirect X-ray detectors are widely used in ordinary flat panel X-ray detectors. Moreover, it can be flexibly combined with commercially mature sensor arrays (e.g., amorphous silicon PDs, thin film transistor arrays, photomultiplier tubes, complementary metal oxide semiconductors, silicon avalanche PDs, and X-ray imaging charge-coupled devices [CCD]), therefore, they have attracted more attention. Scintillator is a unique class of luminescent materials, which is extensively used in many fields such as nondestructive testing, medical imaging, space probes, etc. Compared with the disadvantages of traditional scintillator materials which have high cost, are fragile, have long response time and low spatial resolution disadvantages, metal halide perovskites are considered to be the most potential scintillator materials in ...

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Efficient and Reabsorption‐Free Radioluminescence in Cs₃Cu₂I₅ Nanocrystals with Self‐Trapped Excitons

Cited by 331 publications

References 59 publications

Highly efficient eco-friendly X-ray scintillators based on an organic manganese halide

Highly efficient eco-friendly X-ray scintillators based on an organic manganese halide

Luminescence in Manganese (II)-Doped SrZn2S2O Crystals From Multiple Energy Conversion

Halide Perovskite, a Potential Scintillator for X‐Ray Detection

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