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
·
光电技术
·
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
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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
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
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Qi-Hua Yang,Gui-Hua Li,Yu-Chen Ao,Shu-Juan Zhao,Han-Qi Wei,Le Fu,Zhi-Wei Luo,Tian-Liang Zhou,Chu-Jie Wang,Ge-Mei Cai
As a new generation of environmentally friendly halide materials, Cs 3 Cu 2 I 5 shows up the promising application in scintillation, LED, and photoelectric detection fields. However, liquid phase methods cannot produce Cs 3 Cu 2 I 5 on a large scale, and the preparation process is accompanied by serious pollution. Although the ball milling method can solve the problems caused by the liquid phase synthesis method, the Cs 3 Cu 2 I 5 obtained has many surface defects and low luminescence efficiency. In this work, a strategy of doping-assisted ball-milling synthesis using ZnI 2 is proposed. Similar to the chemical preparation of Cs 3 Cu 2 I 5 , the iodine-rich environment during the modified ball milling process can also play a role in repairing surface defects. And it has been demonstrated through experiments and first principles calculations that the distortion of [Cu 2 I 5 ] 3- under ground/excited state can be adjusted through doping Zn into the Cu1 site, the formation barrier of self-trapped excitons is reduced, and the luminous efficiency of Cs 3 Cu 2 I 5 is significantly improved. Subsequently, using the simple hot-pressing method, the representative Cs 3 Cu 2 I 5 :1.0Zn sample was combined with commercially available polypropylene to fabricate Cs 3 Cu 2 I 5 :1.0Zn@PP film. Finally, the potential applications of the newly-developed film in portable and customizable WLED and scintillation fields were explored.
研究领域:
材料科学
·
光学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Electronic Materials
·
2025
·
IF 4.7
Li Xiao,Xiuxian Li,Zhukang Zhang,Yue Long,Gang Wang,Hengxiang Gong
Integrating wide band gap semiconductor materials with silicon (Si) to create heterojunctions is an effective strategy for enhancing the ultraviolet (UV) sensitivity of optoelectronic devices. However, epitaxially growing high-quality wide band gap films on Si substrates at low temperatures without compromising the properties of Si remains challenging. In this study, we introduce a low-cost mist chemical vapor deposition (CVD) technique to deposit Cs3Cu2I5 perovskite films and fabricate a simple-structured Cs3Cu2I5/n-Si planar heterojunction. This technique enables an orderly deposition and rapid crystallization process, distinct from traditional solution-based methods. Herein, we report for the first time a compact, thick Cs3Cu2I5 film with an average grain size of 5.27 μm and a thickness of approximately 2.8 μm exhibiting orientated growth along the (303) plane. Furthermore, the simply constructed Cs3Cu2I5/n-Si photodiode exhibited a maximum photoresponsivity of 186 mA W–1 and a specific detectivity of 2.5 × 1012 Jones under 278 nm illumination. The on–off cycling tests demonstrated excellent operational stability, with unpackaged devices retaining 90% of their initial photocurrent after two months of storage under ambient conditions.
研究领域:
材料科学
·
光电子学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS CHARACTERIZATION
·
2025
·
IF 5.5
Qi-Hua Yang,Han-Qi Wei,Shu-Juan Zhao,Gui-Hua Li,Xuan Liu,Le Fu,Zhi-Wei Luo,Jia-Yong Si,Ge-Mei Cai
In recent years, the proliferation of counterfeit products has led to increased concerns about anti-counterfeiting technology, with traditional single-mode fluorescence methods proving insufficient due to their susceptibility to replication. The new copper-based halide materials have shown great potential in the field of multi-mode anti-counterfeiting due to their unique structure, excellent luminescence performance, and high defect tolerance. In this work, near-infrared emission of Cs 3 Cu 2 I 5 was achieved for the first time through Bi doping. By exploiting the dual emission center characteristics of the resulting Cs 3 Cu 2 I 5 :Bi, we demonstrated its excitation wavelength-dependent emission. It was then mixed with cyclohexane to prepare an advanced fluorescent anti-counterfeiting coating for screen printing, enabling high-precision pattern printing onto various substrates. The resulting anti-counterfeiting patterns exhibit excellent weather resistance, remaining virtually unchanged after 60 days at room temperature. This study lays the foundation for expanding the emission range of Cs 3 Cu 2 I 5 and adjusting multi band emission, and confirms its potential application in the field of multi-mode anti-counterfeiting.
研究领域:
材料科学
·
光学工程
·
防伪技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Qiaowen Zheng,Yanmei Zhou,Jiarong Huang,Heng Lu,Shaoru Wu,Junying Zhang,Yishan Li,Wenping Hong,Xiaohong Tan,Jinming Lin,Qiang Chen,Feiming Li,Zhixiong Cai,Maosheng Zhang
Cu-based perovskite nanocrystals (NCs) have received great interest as alternatives to lead-based perovskite NCs due to their unique advantages of resource abundance and being environmentally friendly. However, the issue of their inherent low luminous efficiency has limited the application of fluorescence sensing fields. In this work, a highly sensitive fluorescence sensor based on Cu-based perovskite NCs has been constructed by embedding Cs 3 Cu 2 I 5 NCs in room temperature curable deep eutectic solvents (Cs 3 Cu 2 I 5 -DES) for the detection of NH 3 gas in the atmosphere. In this strategy, Lauric acid-based DES with room temperature curable property were successfully synthesized and used as the supporting materials of Cs 3 Cu 2 I 5 -DES sensing film. When NH 3 gas exists, NH 3 can be adsorbed and enriched on the surface of Cs 3 Cu 2 I 5 -DES film, and react with the carboxyl group on the DES, which leads to a significant decrease in the fluorescence intensity of Cs 3 Cu 2 I 5 -DES film. Under optimized experimental conditions, the as-prepared sensing film demonstrated a good linear relationship between the decreased intensity of the fluorescence and the NH 3 concentration, and a low limit-of-detection (LOD) of 0.0642 ppm for NH 3 . Furthermore, the sensor also exhibited excellent selectivity and good stability.
研究领域:
材料科学
·
环境科学
·
化学传感器
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Electronic Materials
·
2024
·
IF 4.3
Jiaqi Li,Shasha Gao,Jintuo Zhu,Sheng Huang
The presence of leakage in respiratory protective equipment undermines its intended efficacy in protection. Therefore, the real-time monitoring of leakage in respiratory protective equipment is of paramount importance. In this work, a lead-free humidity sensor based on Cs3Cu2I5 nanorods was utilized to achieve the leakage detection of respiratory protective equipment. Addition of the organometallic ligand Al(acac)3 improved the stability of the material and contributes to long-lasting stable applications. Cyclic response testing demonstrated rapid response/recovery times of 2.98/2.96 s in the humidity range 20∼80% RH. Further explanation of the moisture sensitivity mechanism and rationalization of RPE leakage monitoring through humidity were explored by density functional theory calculation and computational fluid dynamics calculation. Then, the sensor array was integrated into the respirator and combined with a deep learning algorithm to detect leakage. The results showed that respirator leakage can be effectively identified with an average accuracy of 94.4%, which contributes to the protection of workers’ health.
研究领域:
材料科学
·
生物医学工程
·
环境健康
✓ 已验证
DOI
高影响因子
OPTICAL MATERIALS
·
2025
·
IF 4.2
Fei Gao,ChunYang Liu
Cu-based halide perovskites arouse broad interest in optoelectronics because of the low toxicity and superb optical properties. However, the uniformity of phase purity and crystallite size in Cs 3 Cu 2 I 5 nanocrystals (NCs) can hardly be controlled, restricting the material development. In this study, an efficient method is reported based on addition of an inorganic additive, MgI 2 , into the precursor solutions to improve crystallization and passivate ionic defects of Cs 3 Cu 2 I 5 NCs. This approach results in single-phase Cs 3 Cu 2 I 5 NCs of high crystalline quality that have markedly improved optical performance. The optimized synthesis of Cu-based perovskite NCs with MgI 2 produced samples that exhibited quantum yields as high as 98 % in the deep blue spectral region. The Cs 3 Cu 2 I 5 NCs also had good stability under elevated temperature, ultraviolet light, and air exposure. Light-emitting devices were manufactured based on Cs 3 Cu 2 I 5 NC powder as a phosphor, which exhibited good working stability over 6 h. This work deepens our understanding of the Cu-based perovskite materials, providing a theoretical basis for designing novel high-quality lead-free perovskites materials.
研究领域:
无机化学
·
材料科学
·
光电子学
·
纳米技术
·
固体物理
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）