Journal of Physical Chemistry C
·
2022
·
IF 4.177
Juan Hui,Peng Ran,Yirong Su,Lurong Yang,Xuehui Xu,Tianyu Liu,Yang “Michael” Yang
Lead-free copper halide scintillators have shown tremendous potential applications in X-ray detection and imaging. However, the imaging resolution is still rather limited due to the lack of a scintillation waveguide, especially for the solution-processed nanocrystal scintillators. Here, we report a solution synthesis route for Cs3Cu2I5 nanowire (NW) arrays via an anodized aluminum oxide (AAO) template-assisted in situ growth. As the NWs grow, the precursor concentration directly affects the length and uniformity of the Cs3Cu2I5 NWs among the various factors. The as-synthesized Cs3Cu2I5 NW array scintillators achieve a high spatial resolution of 20 lp mm–1, which is so far the highest value for this emerging copper halide scintillators. The present study provides a convenient and facile method to synthesize Cs3Cu2I5 NW arrays for high-resolution X-ray imaging.
研究领域:
材料科学
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医学影像
·
化学合成
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产品关联
DOI
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
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光学
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环境科学
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DOI
高影响因子
JOURNAL OF LUMINESCENCE
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2022
·
IF 4.171
Xiaofan Zhao,Anjun Luo,Zhongxi Lin,Xingli Zhong,Zhenguo Zhu,Qi Lin,Hui Su
Due to their non-toxicity, excellent thermal stability and optical properties , ternary copper halide perovskites , such as Cs 3 Cu 2 I 5 and CsCu 2 I 3 , have been widely used in light-emitting devices (LEDs), UV and X-ray scintillation detectors. However, laser devices based on these materials have not been fully investigated. In this work, we demonstrated thermally stable Cs 3 Cu 2 I 5 thin films , deposited by dual-source co-evaporation, possessing a photo-luminescence quantum yield (PLQY) up to 50.62%. Using the Cs 3 Cu 2 I 5 as gain media, optically pumped perovskite vertical-cavity surface-emitting lasers (Pe-VCSELs) have been fabricated, integrating with a pair of distributed reflectors (DBRs), and shown lasing at 440 nm with a threshold of ∼1.12 μJ/cm 2 pumped by a 288 nm fs laser. Furthermore, a monolithic dual-wavelength laser, with lasing wavelengths of 458.8 nm and 505.6 nm, has been achieved by depositing an additional gain layer and DBR mirror. Those results indicate that the lead-free ternary copper halide perovskites could be suitable as laser gain materials.
研究领域:
材料科学
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光学工程
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物理学
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
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2023
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IF 9.5
Wei Zhou,Xiaodie Zhu,Jing Yu,Dedan Mou,Hongxing Li,Lingyu Kong,Tianchun Lang,Lingling Peng,Wenbo Chen,Xuhui Xu,Bitao Liu
In recent years, novel metal halide scintillators have shown great application potential due to their tunable emission wavelength, high X-ray absorption, and high luminescence efficiency. However, poor stability and complex device packaging remain key issues for metal halide scintillators, making it difficult to achieve high-resolution and flexible X-ray imaging applications. To address the above issues, a multiprocessing strategy was introduced to prepare Cs3Cu2I5@PMMA scintillator films for long-term stable application, mainly undergo different annealing treatments to make Cs3Cu2I5 crystals to accurately nucleate and then grow in-situ in the PMMA matrix. Then, a series of characterization results illustrate that the prepared Cs3Cu2I5@PMMA scintillator films have high crystallinity, uniform size, excellent flexibility, high stable photoluminescence (PL) and radioluminescence (RL) performance, and high-resolution X-ray imaging capability. Most importantly, Cs3Cu2I5@PMMA scintillator films can not only provide clear and accurate imaging recognition of objects with different complex structures but also maintain stable X-ray imaging quality within 60 days and can achieve flexible X-ray imaging. Therefore, we have provided an effective strategy for producing high-quality scintillator films to meet the multidimensional needs of a new generation of scintillators.
研究领域:
材料科学
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放射学
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纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Science
·
2020
·Vol. 7
·期 11
·2000195
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IF 15.84
Linyuan Lian,Moyan Zheng,Weizhuo Zhang,Lixiao Yin,Xinyuan Du,Peng Zhang,Xiuwen Zhang,Jianbo Gao,Daoli Zhang,Liang Gao,Guangda Niu,Haisheng Song,Rong Chen,Xinzheng Lan,Jiang Tang,Jianbing Zhang
Radioluminescent materials (scintillators) are widely applied in medical imaging, nondestructive testing, security inspection, nuclear and radiation industries, and scientific research. Recently, all-inorganic lead halide perovskite nanocrystal (NC) scintillators have attracted great attention due to their facile solution processability and ultrasensitive X-ray detection, which allows for large area and flexible X-ray imaging. However, the light yield of these perovskite NCs is relatively low because of the strong self-absorption that reduces the light out-coupling efficiency. Here, NCs with self-trapped excitons emission are demonstrated to be sensitive, reabsorption-free scintillators. Highly luminescent and stable Cs 3 Cu 2 I 5 NCs with a photoluminescence quantum yields of 73.7%, which is a new record for blue emission lead-free perovskite or perovskite-like NCs, is produced with the assistance of InI 3 . The PL peak of the Cs 3 Cu 2 I 5 NCs locates at 445 nm that matches with the response peak of a silicon photomultiplier. Thus, Cs 3 Cu 2 I 5 NCs are demonstrated as efficient scintillators with zero self-absorption and extremely high light yield (≈79 279 photons per MeV). Both Cs 3 Cu 2 I 5 NC colloidal solution and film exhibit strong radioluminescence under X-ray irradiation. The potential application of Cs 3 Cu 2 I 5 NCs as reabsorption-free, low cost, large area, and flexible scintillators is demonstrated by a prototype X-ray imaging with a high spatial resolution.
研究领域:
材料科学
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光学
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放射学
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产品关联
DOI
PubMed
高影响因子
Nano Research
·
2023
·Vol. 16
·期 7
·10476-10482
·
IF 9.9
Li Xiaohan,Liu Aijun,Wang Zhaoyu,Wei Youchao,Lin Qun,Chen Yameng,Liu Yongsheng,Hong Maochun
Self-trapped excitons (STEs) emission from halide perovskites with strong exciton-phonon coupling has attracted considerable attention due to the widespread application in optoelectronic devices. Nevertheless, the in-depth understanding of the relationship between exciton-phonon coupling and luminescence intensity remains incomplete. Herein, a doping-enhanced exciton-phonon coupling effect is observed in Cs 3 Cu 2 I 5 nanocrystals (NCs), which leads to a remarkable increasement of their STEs emission efficiency. Mechanism study shows that the hetero-valent substitution of Cu + with alkaline-earth metal ions (AE 2+ ) causes a greater degree of Jahn–Teller distortion between the ground state and excited state structures of [Cu 2 I 5 ] 3− clusters as evidenced by our spectral analysis and first-principles calculations. As a consequence, an X-ray detector based on these Cs 3 Cu 2 I 5 :AE NCs delivers an X-ray imaging resolution of up to 10 lp·mm −1 and a low detection limit of 0.37 µGy air ·s −1 , disclosing the potential of doping-enhanced exciton-phonon coupling effect in improving STEs-emission and practical application for X-ray imaging.
研究领域:
材料科学
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光学
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物理学
✓ 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
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光电子学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS CHARACTERIZATION
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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
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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
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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
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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
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生物医学工程
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环境健康
✓ 已验证
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2023
·
IF 3.6
Yunxue Teng,Mu Gu,Zhixiang Sun,Xiaolin Liu,Bo Liu,Juannan Zhang,Shiming Huang,Chen Ni
Improving the spatial resolution of X-ray imaging is one of the main directions of scintillation screen research. Herein, a structured Cs 3 Cu 2 I 5 scintillation screen based on oxidized silicon micropore array template was developed. A feasible method was explored to solve the problems such as the preparation of oxidized silicon micropore array template with micron-period structure and the compact filling of Cs 3 Cu 2 I 5 scintillator into the template. The X-ray imaging resolution using the structured Cs 3 Cu 2 I 5 scintillation screen reaches 113 lp/mm attributing to the light guide and optical isolation of the template pore walls. The results of detective quantum efficiency, the X-ray imaging photographs of a micro-resolution plate and a small zebrafish show that the image quality using the structured screen is excellent. Meanwhile, the developed Cs 3 Cu 2 I 5 scintillation screen exhibits good radiation resistance, which can keep the light output basically unchanged when the radiation dose is up to 43.2 Gy. The screen also exhibits good luminescence stability compared to Cs 3 Cu 2 I 5 itself due to the protection of the template. These indicate that the structured Cs 3 Cu 2 I 5 scintillation screen has a good application prospect in high-resolution X-ray imaging.
研究领域:
材料科学
·
医学影像学
·
光学
✓ 已验证
产品关联
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
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材料科学
·
光电子学
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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）