ACS Applied Nano Materials
·
2026
·
IF 5.8
Zhuoran Ji,Yuzhao Ouyang,Keqi Xia,Jialin Yang,Tian Shang,Hui Peng,Xiaodong Tang,Chang Yang
Abstract The rapid development of nanoscale integrated photonics demands core materials combining high transparency, high refractive index, and low optical loss. In this work, semi-transparent polycrystalline copper iodide (CuI) bulks were fabricated via the vertical Bridgman technique. Structural characterization reveals dense, large-grained microstructures. To reliably evaluate the material’s intrinsic optical parameters, spectroscopic ellipsometry was performed on a nanometer-thick companion CuI thin film, yielding a high refractive index (∼2.2) that ensures strong optical confinement when paired with common low-index claddings and strong subwavelength optical confinement. Critically, to assess the intrinsic optical transport properties before integrating into nanoscale optical waveguides, and exclude the influence of micro−nano fabrication complexities, a polycrystalline bulk waveguide configuration was utilized. Remarkably, despite the presence of grain boundaries, the material exhibits an attenuation as low as 20 dB/cm in the 900−1100 nm spectral range. This performance, achieved in a non-optimized polycrystalline state, decisively demonstrates the excellent intrinsic waveguiding potential of CuI. These findings establish CuI as a highly promising candidate for next-generation high-index-contrast photonic devices and provide a solid foundation for future CuI-based integrated optics.
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高影响因子
ACS Materials Letters
·
2025
·
IF 8.7
Bingquan Peng,Jie Jiang,Haonan Wang,Ruobing Yi,Fangfang Dai,Yinshuo Li,Lei Zhang,Zhenzhong Yang,Chang Yang,Liang Chen
β-phase cuprous iodide (β-CuI)─a transparent p-type semiconductor with a wide bandgap and low thermal conductivity─holds promise for high-temperature electronics, flexible electrodes, light-emitting diodes (LEDs), and thermoelectrics; however, it is experimentally known only as a high-temperature phase within 645–675 K or in surface-engineered composites. Here, we report two-dimensional (2D) β-CuI monolayers prepared from γ-CuI via phase transformation and liquid-phase exfoliation. These monolayers stably exist under ambient conditions and have a hexagonal structure with a lateral size of ∼500 nm and thickness of 1 nm. Theoretical calculations indicate that the preparation of 2D β-CuI monolayers arises from low exfoliation energy along with dynamic and thermodynamic stability. Interestingly, the 2D β-CuI exhibits a unique self-trapped exciton luminescence phenomenon, emitting a broad white light spectrum close to full-spectrum illumination of sunlight. The findings represent a step toward the preparation of 2D β-CuI under ambient conditions and pave the way for the exploration of its unique properties and applications.
研究领域:
材料科学
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纳米技术
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半导体物理
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光电子学
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凝聚态物理
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Advanced Energy and Sustainability Research
·
2023
·Vol. 4
·期 10
·2300058
·
IF 5.8
Gui-Xian Tian,Yi Yang,Rong-Hua Zhang,Luo-Yi Yan,Zheng Cheng,Dong-Hai Lin,Xin-Wen Zhou
Precious metal Pt-based electrocatalysts have been widely used in the methanol catalytic oxidation anodes in direct methanol fuel cells. However, decreasing their cost and improving their efficiency and durability have still been challenging. Herein, ternary PtPdCu nanocatalysts are synthesized through a facile one-step hydrothermal synthesis method. When KI is present with a suitable amount in the synthesis, PtPdCu nanospheres with surface-embedded CuI clusters (CuI/PtPdCu) are fabricated. However, without KI, the prepared PtPdCu catalysts show a distinct hollow structure (h-PtPtCu). CuI/PtPdCu displays the highest specific activity with enhancement 4 times higher than commercial Pt/C for the methanol oxidation reaction in an alkaline medium. The superior activity can be attributed to two aspects: 1) the electronic effect originating from the highly alloyed PtPdCu; 2) the synergetic effect resulting from surface inlaid CuI clusters, which can promote the CO intermediate removal. Furthermore, because of the stable Pt–Pd-rich surface and its special linked hollow structure, the h-PtPtCu catalyst exhibits good durability with only a 3.6% decay in the specific activity.
研究领域:
化学
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材料科学
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能源科学
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高影响因子
Journal of Physical Chemistry Letters
·
2019
·
IF 7.329
Yong Zhang,Siyuan Li,Wei Yang,Mahesh Kumar Joshi,Xiaosheng Fang
Millimeter-sized CsPbBr3 single crystals were prepared via a facile solvent-evaporation method in ambient environment. The heterojunction between p-type CuI and n-type CsPbBr3 was formed by a simple immersion process. The as-integrated CsPbBr3/CuI device exhibits a good rectifying behavior (ratio of 250 at ±2 V). In particular, the photodetector shows excellent self-powered characteristics under 540 nm light illumination, including high photocurrent (near 100 nA); high photosensitivity (on/off ratio of 1.5 × 103); fast response speed (0.04/2.96 ms); and good wavelength selectivity (565–525 nm), responsivity (1.4 mA W–1), and detectivity (6.2 × 1010 Jones). This work provides a simple, low-cost, and effective method for preparing millimeter-level CsPbBr3 single crystals. The simple device architecture further provides a promising approach for fabricating high-performance self-powered photodetectors.
研究领域:
材料科学
·
光电子学
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半导体器件
·
光电探测
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Jing Li,Ruoqi Wang,Dandan Zhang,Zhen Su,Heping Li,Youwei Yan
To resolve the worldwide water scarcity crises, there is an urgent need to develop highly efficient adsorbent for water purification. For the first time, Copper Iodide (CuI), homogeneously coating on carbon cloth (CuI@CC), is fabricated and investigated as a highly efficient, self-cleaning and easy-recycling adsorbent toward cationic organic dyes with good repeatability. Using the carbon cloth as a substrate, CuI is fabricated successfully via electroplating deposition followed by iodination procedure at ambient temperature. By combining the flexibility from the carbon fiber with the splendid adsorptive ability of the CuI coating, the CuI@CC is not only free-standing and flexible but also a highly efficient adsorbent. Notably, the CuI coating is also self-cleaning to decompose adsorbed organics through photocatalysis , which guarantees its great repeatability to a great extent. By installing the CuI@CC on the designed filtration device, the procedure of recycling and application is convenient and can avoid secondary pollution of water as well. This newly developed CuI coating is expected to be a novel adsorbent as a promising solution to the water crisis.
研究领域:
环境科学
·
材料科学
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Chemistry-An Asian Journal
·
2017
·Vol. 12
·期 13
·1598-1604
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IF 4.083
Zhiwei Jiang,Zhanrong Zhang,Tianbin Wu,Pei Zhang,Jinliang Song,Chao Xie,Buxing Han
Graphical Adding value : A Ru-Zn-Cu I catalyst supported on hydroxyapatite (HAP) was applied for the conversion of glycerol, a biodiesel byproduct, to lactic acid (see scheme). Cu I inhibits C−C bond cleavage and thus improved the yield of lactic acid in this system. The biodiesel production process generates a significant amount of glycerol as a byproduct. A drive to add value has attracted worldwide attention, with the aim of improving the overall effectiveness and profitability of biodiesel production. Herein, we report hydroxyapatite (HAP)-supported Ru-Zn-Cu I (Ru-Zn-Cu I /HAP) as effective catalysts for the transformation of glycerol to lactic acid (LA).The catalysts were characterized by using different techniques. The effects of catalyst composition, reaction time, and temperature on the conversion and product distribution were investigated. It was revealed that Ru nanoparticles of less than 2 nm were dispersed uniformly on HAP. Cu I could effectively inhibit the cleavage of C−C bonds, which led to improved yields of LA. Under optimized conditions, the yield of LA could reach 70.9 % over Ru-Zn-Cu I /HAP. Furthermore, the catalyst could be reused at least four times without an obvious loss of activity or selectivity.
研究领域:
生物化学
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催化化学
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可再生能源
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DOI
PubMed
高影响因子
KINETICS AND CATALYSIS
·
2013
·Vol. 54
·期 6
·716-723
·
IF 0.543
Zeng Minfeng,Sun Xudong,Qi Chenze,Zhang Xian-Man
A novel and environmentally friendly heterogeneous catalyst has been prepared through the wet impregnation of copper(I) species onto the highly porous chitosan microspheres (CuI/PCMS). This novel CuI/PCMS heterogeneous catalyst with no additional ligands is much better than CuI homogeneous catalysts when applied in Heck reactions. Moreover, the reaction conditions are much milder than those for the similar copper catalysts mediated cross-coupling reactions reported in the literature. PCMS has been demonstrated not only the excellent solid support, but also have many unique functional groups to chelate the copper (I) species to enhance its catalytic activity.
研究领域:
催化化学
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有机合成
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材料化学
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环境友好化学
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功能高分子材料
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Fa Cao,Ling Jin,Yong Wu,Xiaohong Ji
Self-powered Ultraviolet (UV) photodetectors (PDs) have attracted great attention due to their outstanding performance. Herein, we report the successful fabrication of self-powered UV PDs based on ZnO/CuI/Au heterojunction . An ultra-high on/off ratio of 4250 and fast rise/decay times of 0.41/0.08 s have been demonstrated from the ZnO/CuI/Au PD. Moreover, the PD exhibits a high responsivity of 61.5 mA/W and detectivity of 1.7 × 10 10 Jones. The device displays long-term cyclic stability with 98.9% retention after 1000 cycles continuous test and superior environmental stability with 97.1% retention tested after 6 months. The synergistic effects of plasmonic Au nanoparticles and ZnO/CuI pn heterostructure play important roles in the enhancement of the photodetect ability. The concept of employing plasmonic Au nanoparticles onto the heterostructure indicates huge potential in achieving self-powered UV PDs for practical applications.
研究领域:
材料科学
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光电子学
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纳米技术
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半导体物理
·
器件工程
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Fengjiao Meng,Menghan Li,Tan Guo,Junsen Zhong,Kai Feng,Lingyu Du,Kunjie Yang,Litao Kang
Constructing electrochromic devices (ECDs) requires high-performance electrochromic electrodes with not only high color contrasts, but also large charge storage capacities. In this paper, a I 0 /CuI conversion-type electrochromic system is developed, achieving reversible and profound color switching between colorless transparent and dark brown, while delivering a large charge storage capacity of 246.7 mA h g −1 . To improve switching durability, a multifunctional P10 (Polyquaternium-10) binder is introduced into the electrode, which can effectively confine the polyiodide intermediates and suppress the shuttle effect. At the same time, the CuI/Cu redox couple is further activated by controlling the applied voltage. The generated Cu from this couple can spontaneously react with residual I 0 species and facilitate the conversion from I 0 to CuI, and therefore in-situ rejuvenate the degraded electrochromic performance. Thanks to these rational designs, this electrochromic electrode achieves rapid response speeds (t coloring : 14 s, t bleaching : 5 s), high optical modulation amplitude (73.4 % at 500 nm), decant coloration efficiency (57.0 cm 2 C −1 ) and impressive cycle stability (without performance degradation after 150 cycles). This work provides a novel electrochromic system for the construction of high-performance electrochromic devices.
研究领域:
材料科学
·
电化学
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高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
·
2026
·
IF 5.1
Qingyin Feng,Xueping Zhao,Zhuoya Zhang,Hai Zhang,Pucun Bai
A flexible γ-CuI/AZO p-n heterojunction UV photodetector was successfully fabricated on a PEN substrate. • Self-powered UV detection with R of 4 mA/W, D* of 2.62 × 10 11 Jones, and fast rise time and decay time (306/116 ms). • The heterojunction exhibits excellent mechanical durability, maintaining stable photoresponse after 500 bending cycles. Flexible ultraviolet (UV) photodetectors have broad application prospects in wearable electronics and low-power optoelectronic systems. In this work, a self-powered UV photodetector based on a γ-CuI/AZO p-n heterojunction was successfully fabricated on a flexible polyethylene naphthalate substrate. Both γ-CuI and AZO films exhibit high visible-light transmittance with optical bandgaps of 3.03 eV and 3.28 eV, respectively, rendering them suitable for UV detection. The device demonstrates distinct rectification behavior in the dark and a markedly enhanced photoresponse under 365 nm UV illumination, achieving stable self-powered operation at 0 V bias. Under a 0 V bias and an incident power density of 103.2 mW/cm 2 , the device demonstrates rise and decay times of 306 ms and 116 ms, respectively. At 33.4 mW/cm 2 , the device achieves a responsivity of 4 mA/W and a specific detectivity of 2.62 × 10 11 Jones, confirming its effective self-powered UV detection capability. Furthermore, cyclic bending tests under a fixed 5-mm radius curvature revealed that the device maintains distinguishable photoresponse after 500 bending cycles, demonstrating robust mechanical tolerance and reliable photodetection under fatigue deformation. This work provides a feasible route for the construction of flexible self-powered UV photodetectors based on p–n heterojunctions. Download: Download high-res image (157KB) Download: Download full-size image
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SYNTHETIC METALS
·
2014
·
IF 2.222
Xu Jia,Liang Shen,Yan Liu,Wenjuan Yu,Xing Gao,Yumeng Song,Wenbin Guo,Shengping Ruan,Weiyou Chen
The p -type semiconductor copper iodide (CuI) was incorporated into P3HT:ICBA bulk heterojunction polymer solar cells (PSCs) as a novel anode buffer layer. The power conversion efficiency of PSCs with 2 nm CuI is 3.84%, about 1.6 times higher than that of the reference device without CuI, which is due to the simultaneous enhanced photocurrent ( J sc ), open current voltage ( V oc ) and fill factor (FF). The CuI buffer layer can module the Schottky barrier and form an ohmic contact at the P3HT:ICBA/Au interface, which act as both holes transport layer and electron block layer. The complex impedance spectra indicate that CuI buffer layer can also effectively decrease the series resistance of whole device.
研究领域:
材料科学
·
光伏技术
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Xin-Yu Zhou,Kai-Wei Chen,Ao-tian Gu,Shan Yun,Ping Mao,Yi Yang,Jing Chen
Adsorption is considered to be one of the most effective methods to remove radioiodine from the solution. However, developing highly efficient adsorbents and the rapid recovery of the used adsorbents is still a challenge. Here, a series of Cu/Fe 3 O 4 bimetallic mutual-doping magnetic aerogels (Cu/Fe 3 O 4 -BMMA) were synthesized. Based on the in-situ bimetallic co-gelation process, the high dispersion of Cu in the aerogel was realized, providing conditions for the efficient elimination of I 2 . The Fe 3+ in the initial gel was reduced to magnetic Fe 3 O 4 during the preparation process, allowing for the quick recovery of the adsorbent through the application of a magnetic field. The adsorption experiments showed that Cu/Fe 3 O 4 -BMMA has good I 2 adsorption capacity (631.3 mg/g) and fast capture kinetics (equilibrium time < 30 min). In addition, Cu/Fe 3 O 4 -BMMA was able to effectively remove trace I 2 in the solution from ppm level (1.0 ppm) down to ppb level (≤30 ppb). The adsorbed I 2 was converted into stable CuI, avoiding secondary pollution due to desorption. Overall, this study provides a potentially efficient iodine capture material for long-term decay storage of radioactive iodine.
研究领域:
环境科学
·
材料科学
·
核工程
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DOI
PubMed
高影响因子
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