Advanced Photonics Research
·
2023
·
IF 3.7
Yaoyu Liu,Tianyu Wang,Zongshuai Ji,Guanfeng Liu,Yunhe Chen,Xin Ding,Bing Teng,Shaohua Ji
Cs 3 Cu 2 Cl 5 is unstable owing to ionic migration and lattice decomposition in the atmosphere. In addition, obtaining large bulk single crystals of Cs 3 Cu 2 Cl 5 is challenging. Herein, a novel strategy is proposed for synthesizing a Cs 3 Cu 2 Cl 5 single crystal that exhibits excellent crystallinity and photoluminescence (PL) properties using an antisolvent-assisted method. Na + is doped into the Cs 3 Cu 2 Cl 5 lattice to replenish the lattice defects caused by chlorine vacancies, thus leading to stronger chemical interactions between Cu + and Cl − ions. Moreover, Na + doping circumvents ionic migration and lattice decomposition, thereby enhancing the PL intensity and maintaining the long-term stability of Cs 3 Cu 2 Cl 5 in the atmosphere. Incorporating 10% Na + into the Cs 3 Cu 2 Cl 5 lattice enhances the PL intensity by 18%, and the high-stability PL can maintain more than 48.5% of the PL intensity after 90 d in an atmospheric environment. In addition, a white light-emitting device (LED) is fabricated using the 10% Na + -doped Cs 3 Cu 2 Cl 5 crystal powder and it exhibits a high color-rendering index (93.7) and correlated color temperature (7120 K). Additionally, it exhibits superior stability, even at a high temperature of 120 °C. Thus, the excellent high-temperature stability of Cs 3 Cu 2 Cl 5 can promote its practical application in LED.
研究领域:
材料科学
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光学
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DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2024
·
IF 5.3
Lili Han,Jihao Zhao,Yifan Miao,Wenqian Zhou,Minglang Yuan,Jinghao Cui,Zhipeng Ci
Copper-based halides have emerged as promising scintillator materials for X-ray imaging, attributed to their favorable photophysical characteristics, such as negligible self-absorption, high light output, and fast decay. Within this category of materials, Cs 3 Cu 2 Cl 5 composite polymer scintillator films stand out, delivering excellent performance as flexible X-ray detector screens. However, severe scattering and light degradation induced by the inevitable agglomeration during recombination restricted the application in high-resolution and flexible X-ray imaging. In this study, a Cs 3 Cu 2 Cl 5 @PMMA film prepared by in-situ growth strategy is successfully developed, which represents uniform area, adjustable flexibility and excellent scintillation performance. The prepared large-area film exhibits green emission at 527 nm, with a high light yield, low detection limit and excellent spatial resolution. Meanwhile, the Cs 3 Cu 2 Cl 5 @PMMA film exhibits a remarkable degree of flexibility, enabling imaging applications on non-planar surfaces. Furthermore, it also demonstrates excellent resistance to high temperature environment, maintaining its high-quality imaging performance at 403 K.
研究领域:
材料科学
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光学
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医学影像
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Yantong Lu,Shaofan Fang,Guangshe Li,Liping Li
Low-dimensional copper (I)-based ternary metal halides , having the features of nontoxicity, outstanding optical performance and great air-stability, is becoming the promising substitutes for traditional metal perovskite halides . Despite the impressive progress in copper halides, highly effective synthesis of their nanocrystals with precise shape and size control, compared to that of conventional lead halide semiconductors, is still remained to be explored. In this work, we report a systematically optimized finds for the colloidal synthesis conditions of Cs 3 Cu 2 Cl 5 nanocrystals (NCs). The Cs 3 Cu 2 Cl 5 NCs are modulated from nanoparticles to nanorods and to nanoplates by adjusting reaction temperature and reaction time. Cs 3 Cu 2 Cl 5 nanorods give a wide emission at 510 nm, being caused by self-trapped exciton state with exciton binding energy of 137 meV and phonon–electron interaction of 25 meV as determined by temperature-dependent photoluminescence spectra. The photoluminescence quantum yield (PLQY) of the nanorods that were reacted at 150 °C for 1200 s, an optimal reaction condition, reaches up to 80.19%. We also find for the first time that the optical quality of Cs 3 Cu 2 Cl 5 NCs is positively related to the full width at half maximum of main peak in X-ray diffraction pattern . The findings in this work give a view to the future planning for Cs 3 Cu 2 Cl 5 ’s colloidal synthesis and raise an intuitive criterion for the quality of as-synthesized Cs 3 Cu 2 Cl 5 NCs.
研究领域:
材料科学
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化学
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DOI
高影响因子
Laser & Photonics Reviews
·
2025
·
IF 10
Yang Tang,Qingyu Xie,Xuanming Zhang,Jiwei Ma,Hao Xie,Yongfeng Liu,Liang Zhao,Dongdong Yan,Xiaoyu Wang,Weixiang Ye
Cs 3 Cu 2 Cl 5 nanocrystals (NCs) have emerged as promising optoelectronic materials owing to their efficient self-trapped exciton (STE) emission. However, their limited environmental stability has significantly constrained their application in light-emitting diodes (LEDs). In this work, a facile ambient-air synthesis strategy is developed for Mg 2 ⁺-doped Cs 3 Cu 2 Cl 5 NCs that simultaneously addresses both stability and emission efficiency challenges. Remarkably, optimal Mg 2 ⁺ doping (20%) enhances the photoluminescence quantum yield (PLQY) from 28.69% to 59.3%. Comprehensive theoretical investigations through density of states (DOS) calculations and ab initio molecular dynamics (AIMD) simulations demonstrate that Mg 2 ⁺ doping induces bandgap narrowing for enhanced radiative recombination while reinforcing the crystal lattice stability. When integrated with a UV LED chip, the optimized NCs enable the fabrication of high-performance green LEDs exhibiting outstanding luminance (17 281 cd m − 2 ) and excellent color stability (CIE coordinates: 0.354, 0.518). This study provides not only a practical synthetic approach for stable copper halide NCs but also valuable insights for designing efficient STE emitters for optoelectronic applications.
研究领域:
材料科学
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光学工程
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理论计算
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Wei Zhou,Sibo Liu,Weiqing Chen,Hao Li,Shuangpeng Yan,Jing Yu,Chong Liu,Lan Zhao,Tianlong Zeng,Tao Han,Dawei Wang,Jianbei Qiu,Xuhui Xu,Bitao Liu
Lead-free Cs 3 Cu 2 Cl 5 metal halide exhibits high photoluminescence quantum yield (PLQY), large Stokes shifts and small self-absorption due to self-trapped excitons (STE) emission, which undoubtedly is a potential scintillator material. However, Cs 3 Cu 2 Cl 5 nanocrystals (NCs) are susceptible to degradation by moisture at high humidity environment, which severely affects its long-term application in X-ray imaging. Herein, we prepared Cs 3 Cu 2 Cl 5 scintillator films with a PLQY of 72.4% and a high spatial resolution of 20 lp mm −1 . Moreover, we firstly propose a self-healing strategy with facile microwave treatment to recover the crystal structure of Cs 3 Cu 2 Cl 5 film which damaged by moisture, while the photoluminescence (PL) and radioluminescence (RL) intensities of the damaged Cs 3 Cu 2 Cl 5 film are repaired to more than 95% and the spatial resolution can be restored to 20 lp mm −1 . Furtherly, the imaging quality of the self-healing scintillator film can be maintained stably by cyclic microwave treatment. It found that microwave treatment provides a simultaneous and molecular level heating environment for the Cs 3 Cu 2 Cl 5 film, which drives the hydrolysates to re-crystallize along with the surface of the destroyed crystals. Therefore, microwave treatment opens a new avenue to recover Cs 3 Cu 2 Cl 5 films degraded by moisture, and provides a solution for long-term application of scintillator films at low cost.
研究领域:
材料科学
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医学影像
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光学
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DOI
高影响因子
Advanced Optical Materials
·
2022
·Vol. 11
·期 3
·2202059
·
IF 10.05
Zhicheng Wang,Jiale Guo,Qi-Sheng Lin,Guanghui Rao,Jingtai Zhao,Chengzhang Yang,Weixiang He,Chujie Wang,Zhijun Zhang
Copper-based metal halide scintillators have received increasing attention due to their high light yield and nontoxicity. However, the synthetic methods are still not feasible for actual commercialization for the difficulty in scaling up and the absence of green chemical footprint. Herein, we report a new, simple, aqueous synthetic method for the mass production of highly purified and crystallized Cs 3 Cu 2 Cl 5 powder by a room-temperature reaction between a saturated aqueous solution of CsCl and a saturated hydrochloric acid solution of CuCl. The product exhibits a photoluminence peak centering at 527 nm (FWHM = 106.7 nm) and a quantum yield (PLQY) of 97%. A prototype X-ray imaging detector is fabricated by coupling a large area scintillation screen prepared by blade coating of Cs 3 Cu 2 Cl 5 powder and a commercial thin-film transistor (TFT) panel (16 cm × 13 cm, 125 µm pixel size) with readout circuit. The device exhibits a high spatial resolution of 4 lp mm −1 , exceeding the theoretical limit of the TFT panel, and an excellent dynamic imaging ability. In short, this work demonstrates an efficient novel synthetic method of Cs 3 Cu 2 Cl 5 and its application as X-ray imaging device, providing an applicable solution for its future commercialization.
研究领域:
材料科学
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医学影像
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化学工程
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DOI
高影响因子
Advanced Optical Materials
·
2021
·Vol. 9
·期 13
·2100307
·
IF 9.926
Shuangyi Zhao,Chen Chen,Wensi Cai,Ru Li,Haiyun Li,Siqi Jiang,Min Liu,Zhigang Zang
The poor stability of lead-free Cs 3 Cu 2 Cl 5 nanocrystals (NCs) is the main impediment for their broad practical applications. Here, a sol-gel reaction using tetraethoxysilane (TEOS) as the silica coating precursor to prepare Cs 3 Cu 2 Cl 5 @SiO x NCs is proposed. Due to the efficient passivation and robust protection of SiO x shells on the NCs surface, Cs 3 Cu 2 Cl 5 @SiO x NCs solution and films exhibit a high photoluminescence quantum yield of 98% and 76%, respectively, and improved stability against water and heat. Cs 3 Cu 2 Cl 5 @SiO x NCs are then used to fabricate warm white light-emitting diodes (WLEDs), which show a high color-rendering index of 94 and a proper correlated color temperature of 5049 K, and maintain an excellent thermal (265–360 K) and prolonged operating (380 h) stability. In addition, the good white light emission facilitates the application in visible light communication (VLC). The VLC light source demonstrates a −3 dB bandwidth of 420 kHz, and the achieved data rate of the VLC system reaches 2.65 Mbps using orthogonal frequency division multiplexing modulation with a bit loading. As a result, lead-free Cs 3 Cu 2 Cl 5 @SiO x NCs with an efficient optical performance and an excellent stability might promote the development of stable NCs and extend the applications in optoelectronics.
研究领域:
材料科学
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光电
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光子学
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2022
·
IF 9.221
Jiacheng Cao,Qian Chen,Zeyi Wang,Xiaoshan Wang,Zhiwei Wang,Jusheng Bao,Xiao Huang
Apart from their outstanding photoelectronic properties, metal halide perovskites have demonstrated reversible stimuli-responsibility toward a variety of different environmental stimulus. Herein, we used a hot-injection method to deposit lead free perovskite Cs 3 Cu 2 Cl 5 on layered metal chalcogenide NbS 2 . The Cs 3 Cu 2 Cl 5 /NbS 2 heterostructures and the pure Cs 3 Cu 2 Cl 5 crystals were fabricated into humidity sensors based on impedance change. The heterostructures exhibited an ultra-high humidity sensing response of up to 10 4 when the relative humidity (RH) was changed from 11% to 97%, which was at least one order of magnitude higher than that of the pure Cs 3 Cu 2 Cl 5 crystals. The enhanced performance of the heterostructures was attributed to the improved film continuity and hydrophilicity , which respectively led to the improved charge/ion conduction and increased water adsorption. In addition, the Cs 3 Cu 2 Cl 5 /NbS 2 heterojunction is ohmic-like, enabling effective charge/ion transfer across the interface. Given the high RH response of the heterostructures, a contactless sensing device was fabricated, targeting for the vapor emitted from a fingertip. Our work demonstrates that heterostructures between metallic 2D materials and metal halide perovskites are promising sensing materials.
研究领域:
材料科学
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纳米技术
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传感器
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环境科学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Yandong Ren,Shuchen Lü
Copper(I) halides have recently attracted increasing attention in a variety of photonics applications, owing to their highly luminescent efficiency, nontoxicity, and low-dimensional electronic structure. Moreover, combining compositional engineering and mass production of new materials may further enrich the research and application of functional materials. Herein, we controllably synthesized two series of novel mixed-halide Cs 3 Cu 2 Cl 5-x I x and Cs 5 Cu 3 Cl 8-x I x powders via the compositional engineering for the first time. The crystal structures are identified with Rietveld refinement and density functional theory calculations. The mixed-halide compound exhibits relatively wide full width of half-maximum (~70 nm), adjustable bandgap (from 449 nm to 486 nm), larger Stokes shifts (~200 nm), and dramatic improved stability with high efficiency (photoluminescence quantum yield at least 90.61%), which present a scalable strategy for mass production for practical applications. In addition, the controllable phase transformation from blue-emitting Cs 3 Cu 2 I 5 to yellow-emitting CsCu 2 I 3 was confirmed. Most notably, the white light is obtained by combining novel Cs 3 Cu 2 Cl 5-x I x /Cs 5 Cu 3 Cl 8-x I x with yellow-emitting CsCu 2 I 3 powders. Based on this, we firstly introduce the blue-emitting Cs 5 Cu 3 Cl 7 I powders in white LED fabrication by combining ultraviolet chip and as-prepared yellow-emitting CsCu 2 I 3 powders, to generate high-quality and stability white light with CIE coordinates of (0.335, 0.398) and colour rendering index value of 77.8. For comparison, red-emitting CaAlSiN 3 :Eu 2+ phosphors are also introduced for LED package to substitute CsCu 2 I 3 powders, which exhibit the high colour rendering index of 89.2. This work not only develops new mixed-halide compounds with high stability and performance, but also provides the unique strategy for promoting industrialization process of LED backlights.
研究领域:
材料科学
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光子学
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光电
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化学
·
工程
✓ 已验证
产品关联
DOI
高影响因子
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
·
2024
·Vol. 27
·期 24
·e202400187
·
IF 2.2
Wen Meng,Chuying Wang,Guangyong Xu,Guigen Luo,Zhengtao Deng
Graphical The Cs3Cu2Cl5 NCs synthesized with MnC2O4 as the defect repair agent exhibited negligible self-absorption, bright and stable luminesces with PL emission at about 535 nm and PLQY can be increased from 68.7 % to 100 %, which is expected to be used as highly efficient light emitter in high-efficiency X-ray scintillator. The toxicity and chemical instability shortcomings of lead halide perovskites are major concerns that continue to motivate the search for next generation alternatives. Copper halides are known to be lead-free, earth-abundant, low-cost, and environmentally friendly, and affordable in optoelectronic performance due to their bright luminescence, tunable emission wavelength, and excellent stability. However, the controlled synthesis of low-dimensional copper halide nanocrystals (NCs) with near-unity photoluminescence quantum yield (PLQY) and high stability remains a great challenge. In this work, we report a reasonable optimization approach for the preparation of Cs 3 Cu 2 Cl 5 NCs by hot-injection colloidal synthesis technology. Specifically, the Cs 3 Cu 2 Cl 5 NCs synthesized with MnC 2 O 4 as the defect repair agent exhibited negligible self-absorption, bright green luminosity with PL emission at about 535 nm and PLQY can be increased from 68.7 % to 100 %. The Cs 3 Cu 2 Cl 5 NCs shows excellent stability and outstanding optical properties, and is expected to be used as highly efficient green light emitter in high-efficiency X-ray scintillator.
研究领域:
材料科学
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光学工程
✓ 已验证
产品关联
DOI
高影响因子
Advanced Optical Materials
·
2025
·
IF 7.2
Heng Guo,Jiajun Ma,Fangfang Zhang,Zhuxin Li,Linlin Shi,Xiaowei Wang,Xiaoli Duan,Ganesan Annadurai,Jakrapong Kaewkhao,Yizhi Zhu
The increasing demand for radiation detection in applications like medical diagnostics and security inspection drives scintillator research. Traditional scintillators are limited by toxicity, crystallization challenges, and high production costs. A one-step chemical vapor deposition (CVD) method is developed to produce high-purity, large-area, and uniform Cs 3 Cu 2 Cl 5 microcrystalline film. This material utilizes a unique self-trapped exciton (STE) emission mechanism, resulting in significant Stokes shift of 241 nm and a high photoluminescence quantum yield (PLQY). It offers new opportunities for converting X-ray and high-energy radiation. It shows a linear RL intensity increase with dose rates (25–188 µGy s −1 ), excellent dose-response linearity, and high absorption coefficients comparable to commercial scintillators. This X-ray imaging system allows for high-resolution visualization of internal chip structures even at low doses. This work establishes a controllable synthesis method for large-area scintillator films and highlights the potential of Cs 3 Cu 2 Cl 5 microcrystalline film as a next-generation scintillators materials.
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高影响因子
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