Materials Advances
·
2023
·Vol. 4
·期 17
·3714-3723
·
IF 5
Lu Yao,Wanting Gui,Xunsheng Zhou,Chao Li,Shi Zhang,Jing Kui Zhao,Cai Lin Wang
All-inorganic lead-free perovskite scintillators have attracted wide applications in X-ray imaging recently due to their low cost, high resolution, and environmental friendliness. However, their potential application in thermal neutron detection has yet to be thoroughly explored. In this article, the properties of all-inorganic perovskite Cs3Cu2I5 scintillators for thermal neutron detection have been investigated. A simple synthesis process has been applied to produce Cs3Cu2I5 scintillators. The as-prepared Cs3Cu2I5 crystals exhibit intense blue emission with a photoluminescence quantum yield (PLQY) of 60.3%. A composite of 6LiF, Cs3Cu2I5, and poly(methyl methacrylate) (PMMA) has been utilized for thermal neutron detection, which has a light yield of about 28 000 photons per thermal neutron, four times that of a commercial 6Li-glass (GS20) scintillator (7000 photons per thermal neutron). Effective neutron-gamma-pulse-discrimination has been achieved using a network-dynamics digital filter, effectively separating thermal neutrons from gamma events. Our composite scintillators have a high thermal neutron absorption efficiency of about 60%. In addition, Cs3Cu2I5 crystals are more sensitive to X-ray irradiation compared to commercial Na-doped CsI scintillators. Our work provides a new strategy for large-scale perovskite-based thermal neutron detection and imaging.
研究领域:
材料科学
·
核技术应用
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Xinhong Zhao,Yu Tao,Jixiang Dong,Yongchu Fang,Xiaoxian Song,Zaoxue Yan
Wearable, portable, and biocompatible optoelectronic devices made of all-green and abundant materials and fabricated by low-temperature solution method are the key point in the development of next generation of intelligent optoelectronics. However, this is usually limited by the weaknesses of mono-component materials, such as non-adjustable photoresponse region, high carrier recombination rate, high signal-to-noise ratio, as well as the weak mechanical flexibility of bulk films. In this work, the Cs3Cu2I5/ZnO heterostructure flexible photodetectors were constructed by a low-temperature solution method combined with spin-coating technique. The heterostructure combines the low dark current and strong deep ultraviolet absorption of Cs3Cu2I5 quantum dots with the high carrier mobility of ZnO quantum dots as well as the efficient charge separation of the vertical p–n junction, to improve the photodetection performance. The heterostructure shows enhanced light/dark current ratio and ultraviolet-to-visible rejection ratios. Under an illumination of 280 nm light, an optical detectivity as high as 1.26 × 1011 Jones was obtained; the optical responsivity and response time are much better than those of control devices. After 300 times of 180° bending cycles, the photocurrent had no obvious change. The results demonstrate that the Cs3Cu2I5/ZnO heterostructure has great potential in wearable and portable visible-blind ultraviolet optoelectronic devices.
研究领域:
材料科学
·
光电子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Fanju Zeng,Yuanyang Guo,Wei Hu,Yongqian Tan,Xiaomei Zhang,Julin Feng,Xiaosheng Tang
Recently, several types of lead halide perovskites have been demonstrated as active layers in resistive switching memory or artificial synaptic devices for neuromorphic computing applications. However, the thermal instability and toxicity of lead halide perovskites severely restricted their further practical applications. Herein, the environmentally friendly and uniform Cs3Cu2I5 perovskite films are introduced to act as the active layer in the Ag/Cs3Cu2I5/ITO memristor. Generally, the Ag ions could react with iodide ions and form AgIx compounds easily, so the Ag/PMMA/Cs3Cu2I5/ITO memristor was designed by employing the ultrathin polymethylmethacrylate (PMMA) layer to avoid the direct contact between the top Ag electrode and Cs3Cu2I5 perovskite films. After optimization, the obtained memristor demonstrated bipolar resistive switching with low operating voltage (< ±1 V), large on/off ratio (102), stable endurance (100 cycles), and long retention (>104 s). Additionally, biological synaptic behaviors including long-term potentiation and long-term depression have been investigated. By using the MNIST handwritten recognition data set, the handwritten recognition rate based on experimental data could reach 94%. In conclusion, our work provides the opportunity of exploring the novel application for the development of next-generation neuromorphic computing based on lead-free halide perovskites.
研究领域:
材料科学
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电子工程
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神经科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CRYSTENGCOMM
·
2023
·Vol. 25
·期 38
·5444-5451
·
IF 3.1
Jianming Lai,Qiutao Pan,Wenzhen Wang,Shaohan Wang,Ziyi Lai,Xiaoxi Feng,Jing Sun,Huanzhen Qi,Feng Hong,Zifa Zhang,Fei Xu,Junfeng Chen,Yan Zhu,Juan Qin,Hui Zhang,Run Xu,Linjun Wang
The recent emergence of low-dimensional copper-based halide perovskite Cs3Cu2I5, for use in optoelectronics and radiation detection, has evoked considerable interest. Presently, Cs3Cu2I5 single crystals grown using solution methods barely have clearly defined crystal planes and the crystal quality remains inferior. In this work, we have achieved high-quality Cs3Cu2I5 single crystals featuring prominent crystal habit planes through reducing the growth rate by controlling the concentration of I− ions via the addition of formic acid. The slow reaction between I3− and formic acid at a lower growth temperature can effectively control the concentration of I− ions in the solution, thereby reducing the growth rate and extending the metastable growth range simultaneously. This optimized process can yield high-quality single crystals, with a reduced full width at half maxima (FWHM) of 0.047° for the X-ray rocking curve on the (002) natural crystal habit plane, a substantially improved energy resolution of 7.1% for a photon energy of 511 keV, and an increased absolute light yield to 39 000 photons per MeV. Our study demonstrates that the reaction-controlled growth may be an effective way to improve the crystal quality of the copper-based halide perovskite.
研究领域:
材料科学
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光学
·
辐射探测
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2024
·Vol. 14
·期 13
·1118
·
IF 4.4
Na Guo,Lili Liu,Guilong Cao,Shurui Xing,Jingying Liang,Jianjun Chen,Zuojun Tan,Yuequn Shang,Hongwei Lei
Lead-free Cs3Cu2I5metal halides have garnered significant attention recently due to their non-toxic properties and deep-blue emission. However, their relatively low photoluminescence quantum efficiency and poor stability have limited their applications. In this work, sodium iodide (NaI) is used to facilitate the synthesis of Cs3Cu2I5nanocrystals (NCs), demonstrating improved photoluminescence intensity, photoluminescence quantum yield, and stability. Systematic optoelectronic characterizations confirm that Na+is successfully incorporated into the Cs3Cu2I5lattice without altering its crystal structure. The improved Photoluminescence Quantum Yield (PLQY) and stability are attributed to the strengthened chemical bonding, which effectively suppresses vacancy defects in the lattice. Additionally, light-emitting diodes (LEDs) based on 10% NaI-doped Cs3Cu2I5NCs were assembled, emitting vibrant blue light with a maximum radiant intensity of 82 lux and Commission Internationale de l’Eclairage (CIE) chromaticity coordinates of (0.15, 0.1). This work opens new possibilities for commercial lighting display applications.
研究领域:
材料科学
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光电技术
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纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Optical Materials
·
2022
·Vol. 10
·期 23
·2201161
·
IF 10.05
Qian Yao,Jiaming Li,Xuesong Li,Xiaoxin Zheng,Zungang Wang,Xutang Tao
Copper(I) halide perovskite Cs 3 Cu 2 I 5 has recently attracted tremendous interest and has been considered an exceptionally promising scintillator due to its high quantum yield. However, its slow scintillation decay time, previously considered an intrinsic property, is a significant drawback preventing its practical application and commercialization. But in this work, it is found that the high-quality Cs 3 Cu 2 I 5 single-crystal grown by the designed aqueous solution method surprisingly exhibits a fast scintillation decay time of 39 ns (82%), quite different from previous reports. This subversive change may be due to the high crystal quality with denser 0D structure and low trap density (6.41 × 10 8 cm –3 ), changing the excited-state structural deformation and accelerating the recombination of electrons and holes while directly reducing the prolongation of decay time caused by inherent defects. Moreover, the single-crystal with a rocking curve FWHM value of only 50.4˝ has a high optical transmittance (85%), a very high absolute photoluminescence quantum yield (PLQY, 97.76%), superior environmental stability, and excellent light-yield and energy resolution under different γ-ray sources ( 241 Am, 60 Co, 22 Na, 137 Cs, 152 Eu). These extraordinary properties pave the way for the subsequent development of practical applications.
研究领域:
材料科学
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光学
·
辐射探测
✓ 已验证
DOI
高影响因子
Crystals
·
2025
·Vol. 15
·期 8
·716
·
IF 2.4
Yang Li,Xue Du,Silong Zhang,Bo Liu,Naizhe Zhao,Yapeng Zhang,Xiaoping Ouyang
Thin-film detection technology plays a significant role in particle physics, X-ray imaging and radiation monitoring. In this paper, the detection capability of a Cs3Cu2I5thin-film scintillator toward α particles is investigated. The flexible thin-film scintillator is fabricated by a facile and cost-effective in situ strategy, exhibiting excellent scintillation properties. Upon α-particle excitation, the light yield of the Cs3Cu2I5thin-film is 2400 photons/MeV, which greatly benefits its application for single-particle events detection. Moreover, it shows linear energy response within the range of 4.7–5.5 MeV and moderate decay time of 667 ns. We further explored the cryogenic scintillation performance of Cs3Cu2I5@PMMA film. As the temperature decreases from 300 K to 50 K, its light yield gradually increases to 1.3 fold of its original value, while its decay time remains almost unchanged. This scintillator film also shows excellent low-temperature stability and flexible operational stability. This work demonstrates the great potential of the Cs3Cu2I5@PMMA film for the practical utilization in α-particle detection application.
研究领域:
粒子物理
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辐射探测
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材料科学
·
核工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Zhi Jiang,Hezhuang Liu,Jihua Zou,Yixuan Huang,Zhaoquan Xu,Caihong Li,Desheng Liu
With the rapid advances in metal halide perovskite optoelectronics, eliminating toxic lead from perovskites has been an urgent demand. However, state-of-the-art lead-free perovskite photodetectors are still challenged with issues of low photoresponse, poor stability, etc. Here, all-inorganic lead-free perovskite (Cs3Cu2I5) single crystals that possess good stability under air exposure are synthesized via a facile solid reaction method. Meanwhile, a higher photoluminescence quantum yield of 95.2% and a prolonged carrier lifetime of 1.127 μs are obtained by further optimizing the synthesis. Benefiting from the polyporous surface and hollow structure of Cu-7,7,8,8-tetracyanoquinodimethane (CuTCNQ) microtubes, more Cs3Cu2I5 nanocrystals can adhere on the innershell and outershell of CuTCNQ-15 microtubes. This unique structure contributes to the improved efficiency of utilizing incident light and promotes charge carrier generation and transportation. As a result, the hierarchical CuTCNQ/Cs3Cu2I5 (hollow microtube/nanocrystal) heterostructure phototransistor exhibits a high responsivity of 88.36 A W–1 and a large detectivity of 1.66 × 1012Jones. The proposed lead-free perovskites and mixed-dimensional heterojunctions are promising for sensitive light detection.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
Advanced Photonics Research
·
2022
·Vol. 3
·期 12
·2200197
·
IF 0
Heng Guo,Qingxian Zhao,Peng Ran,Jinping Chen,Yizhi Zhu,Qingsong Jiang,Yuling Tang,Zhenhua Zhang,Lei Song,Chunxiang Xu,Shouhua Luo,Zengliang Shi
Scintillator is a critical component to detect high-energy particles or rays, which is widely used in deep space exploration, security inspection, and nondestructive testing and medical diagnosis, such as X-ray imaging and computed tomography (CT). However, the wider application of traditional inorganic and organic scintillators is limited by the complex operation process or poor adaptability to changeable environment, and there remains a demand to develop green and stable scintillators with high sensitivity and low detection limit. Herein, the one-step preparation of lead-free perovskite Cs 3 Cu 2 I 5 scintillator film for high-definition X-ray imaging by conventional chemical vapor deposition method is reported. Cs 3 Cu 2 I 5 demonstrates good stability and bright-blue emission at 445 nm and superhigh photoluminescence quantum yield (85.14%). Importantly, upon X-ray irradiation, the Cs 3 Cu 2 I 5 perovskite film exhibits light yield (≈39 251 photons MeV −1 ) as high as two times of the commercially available Ce:LuAG single-crystal scintillator (≈22 000 photons MeV −1 ). Furthermore, the practical demonstration for a bamboo stick and insect specimens illustrates sensitive scintillation response to X-ray signals with superior linearity and high-quality images in X-ray photography and CT. Overall, Cs 3 Cu 2 I 5 film provides nontoxicity, high radioluminescence intensity, and good stability, it can be regarded as a competitive material for X-ray imaging.
研究领域:
材料科学
·
医学影像
·
辐射探测
✓ 已验证
DOI
Nature Communications
·
2021
·Vol. 12
·期 1
·1-9
·
IF 14.919
Li Xiaoming,Chen Jiaxin,Yang Dandan,Chen Xi,Geng Dongling,Jiang Lianfu,Wu Ye,Meng Cuifang,Zeng Haibo
Fluorescent type nuclear battery consisting of scintillator and photovoltaic device enables semipermanent power source for devices working under harsh circumstances without instant energy supply. In spite of the progress of device structure design, the development of scintillators is far behind. Here, a Cs 3 Cu 2 I 5 : Mn scintillator showing a high light yield of ~67000 ph MeV −1 at 564 nm is presented. Doping and intrinsic features endow Cs 3 Cu 2 I 5 : Mn with robust thermal stability and irradiation hardness that 71% or >95% of the initial radioluminescence intensity can be maintained in an ultra-broad temperature range of 77 K-433 K or after a total irradiation dose of 2590 Gy, respectively. These superiorities allow the fabrication of efficient and stable nuclear batteries, which show an output improvement of 237% respect to the photovoltaic device without scintillator. Luminescence mechanisms including self-trapped exciton, energy transfer, and impact excitation are proposed for the anomalous dramatic radioluminescence improvement. This work will open a window for the fields of nuclear battery and radiography.
研究领域:
材料科学
·
核能工程
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Qihua Yang,Hanqi Wei,Guihua Li,Shujuan Zhao,Yuchen Ao,Xuan Liu,Le Fu,Gemei Cai
Cs 3 Cu 2 I 5 materials exhibit significant potential in diverse application fields like LEDs, scintillation, photoelectric detection, and so on. However, their poor stability against moisture /water and singularity nature of emission band hinder their rapid utilization. Differing from the lattice or ligand modification methods commonly used, this work deftly integrates solid-state sintering and glass composite techniques to synthesize Cs 3 Cu 2 I 5 nanocrystal-in-glass composite (NGC) with exceptional stability. Cs 3 Cu 2 I 5 NGC demonstrated remarkable stability, maintaining its integrity even after immersion in an aqueous solution for 240 h or exposure to air for 180 days. Importantly, this proposed fabrication approach further utilizes the high solubility of glass materials for rare earth elements to solve the problem of the low solid solubility of Re 3+ in Cs 3 Cu 2 I 5 . The full-spectrum tunable emission has been achieved in the composite of Re 3+ and Cs 3 Cu 2 I 5 materials for the first time. This study not only validates Re-Cs 3 Cu 2 I 5 NGC as a promising fluorescent material but also establishes a novel method for fabricating composite materials based on rare-earth and copper perovskites, along with verifying their suitability in optical applications such as anti-counterfeiting and temperature measurement.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Nano
·
2024
·
IF 15.8
Huimin Yang,Xiaoming Mo,Wangbing Xiong,Kailian Dong,Yulu Zhou,Xiaoma Tao,Yifang Ouyang,Jialong Zhao,Guojia Fang
Ultraviolet photodetectors (UV PDs) based on microcrystals (MCs) have attracted extensive attention due to their outstanding detection performance. Nevertheless, precise manipulation of the MCs still remains challenging, which may hinder the mass processing and performance improvement of the UV PDs. In this work, a single high-quality Cs3Cu2I5 MC that had a special X-shaped morphology was demonstrated to be successfully manipulated to prepare high-performance UV PDs by virtue of optical focusing, probe micromanipulation, and direct-write photolithography techniques. The UV PDs, prepared on the counter limbs and adjacent limbs of the single X-shaped Cs3Cu2I5 MC, exhibited distinctly different dual-mode photoresponse under 254 nm UVC and 310 nm UVB irradiations. At light intensity as low as 2.59 μW/cm2, the counter electrode and adjacent electrode UV PDs showed quite a high responsivity of up to 3376 A/W, a specific detectivity of up to 2.37 × 1014 Jones, and an on/off ratio of up to 1.79 × 102 at a bias voltage of 5 V. Besides, even after 28,800 s (8 h) of continuous operation under dual-mode UV irradiations at 254 and 310 nm, the unpackaged device showed extraordinary stability in the photocurrents in ambient air. Our findings provide inspiration for preparing high-performance dual-mode UV PDs based on the microscale perovskite-inspired copper halides or other semiconductor MCs.
研究领域:
材料科学
·
光电子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）