JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2018
·Vol. 29
·期 10
·8838-8846
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IF 2.324
Zhang Hailiang,Yuan Shuai,Qiu Zhiwen,Jiang Yanan,Zhu Xiaomeng,Wan Xingxing,Cao Bingqiang
Copper iodide (CuI) thin film grown by a direct vacuum thermal evaporation method at low temperature is utilized as inorganic hole transport layer in planar CH 3 NH 3 PbI 3−x Cl x -based perovskite solar cell. The device performance is mainly controlled by the deposition rate of CuI layer for optimized thickness. The reason was investigated in detail by transient photovoltage/photocurrent spectroscopy (TPV/TPC), X-ray photoelectron spectroscopy (XPS), and the energy-dispersive X-ray spectrum (EDS). The results indicate that larger deposition rate leads to a non-stoichiometric CuI layer with excess iodine. More importantly, the redundant iodine is illustrated as the recombination center that results in interface recombination. Under optimized CuI growth condition, a power conversion efficiency of 6.4% has been achieved with a short-circuit current density (J SC ) of 16.4 mA/cm 2 , an open-circuit voltage (V OC ) of 730 mV, and a fill factor (FF) of 54%. Our results open a possibility for further improvement of perovskite solar cells by controlling the concentration and distribution of iodine in the perovskite films.
研究领域:
材料科学
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能源科学
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DOI
高影响因子
Energy Technology
·
2017
·Vol. 5
·期 10
·1836-1843
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IF 2.789
Haoxin Wang,Ze Yu,Xiao Jiang,Jiajia Li,Bin Cai,Xichuan Yang,Licheng Sun
The inorganic p-type semiconductor CuI possesses several unique characteristics such as high transparency, low-production cost, high hole mobility, and good chemical stability and is a promising hole-transporting material candidate that can be explored in solar-cell devices. Herein, we adopt a simple solid–gas reaction method to fabricate a uniform CuI film by exposing a thermally evaporated copper film to iodine vapor and apply it as a hole-transporting layer (HTL) in inverted planar perovskite solar cells (PSCs). The optimized devices display a promising power conversion (PCE) efficiency of 14.7 %, with an open-circuit voltage of 1.04 V, a short-circuit current density of 20.9 mW cm −2 , and a fill factor of 0.68. This is one of the highest PCE values reported so far for CuI-based HTL in PSCs. Moreover, the devices studied also exhibit good long-term stability at ambient atmosphere, arising from the hydrophobicity of CuI HTL. The results highlight that CuI fabricated using the simple and low-temperature processing method presented here holds great promise as low-cost alternative HTL material for the development of efficient and stable inverted planar PSCs in the future.
研究领域:
材料科学
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能源技术
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光伏器件
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产品关联
DOI
高影响因子
ACS Catalysis
·
2021
·
IF 13.084
Yiwen Yang,Haifeng Qi,Huixiang Li,Zhanwei Xu,Xiumei Liu,Shuyin Yu,Zongchao Conrad Zhang
Efficient hydrolysis of β-1,4-glycosidic bonds of cellulose is a pivotal step in biorefineries of cellulosic biomass. In this work, we discovered that paired PdCl2–CuCl exhibited excellent synergetic catalytic activity over the single PdCl2 or CuCl in the hydrolysis of β-1,4-glycosidic bonds in 1-butyl-3-methylimidazolium chloride ([BMim]Cl) and further investigated the catalytic species in this system. The catalytic activity increased and reached a plateau at a CuCl/PdCl2 ratio of 1 with increasing molar ratio of CuCl/PdCl2 while keeping the Pd concentration constant. A combination of experimental evidence based on in situ far-infrared absorption, X-ray absorption, X-ray photoelectron, and electron paramagnetic resonance spectroscopies and DFT calculations demonstrate the coupling reaction between [PdIICl4]2– and [CuICl3]2– via the Cl bridge to form the heterometallic complex anion [Cl2PdII–Cl–CuICl2]2–. The heterometallic species is stable during the reaction and maintains its catalytic performance in the presence of various oxygenate additives. Using paired PdCl2–CuCl as a catalyst, the activation energy of hydrolytic cleavage of β-1,4-glycosidic bonds of cellobiose is determined as low as 95.8 kJ/mol. PdCl2–CuCl/[BMim]Cl combined with CrCl3 can be reused five times in cellobiose conversion to 5-hydroxymethylfurfural (5-HMF) without an apparent decrease of catalytic activity. The performance of this catalytic system is further verified for efficient cellulose conversion. More than 60% product yield is obtained at 100 °C from the cellulose, affording monosaccharides for efficient production of high value-added chemicals, such as 5-HMF, when CrCl3 is present to catalyze the conversion of glucose to 5-HMF.
研究领域:
生物化学
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催化化学
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生物质能
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DOI
高影响因子
Catalysis Science & Technology
·
2022
·Vol. 12
·期 6
·1968-1977
·
IF 6.177
Yiwen Yang,Haifeng Qi,Zhanwei Xu,Z. Conrad Zhang
In this work, we identified the prevailing catalytically active species evolved from paired PdCl2–CuCl2 in 1-butyl-3-methylimidazolium chloride ([BMim]Cl) that displayed dramatic synergy between the two metal chlorides in catalyzing the hydrolysis of β-1,4-glycosidic bonds in cellulose. Ultraviolet-visible (UV-vis), far infrared (FIR), and electron paramagnetic resonance (EPR) spectroscopy provide clear evidence for the prominent evolutionary pathways to form the catalytically active species. It is observed that the strong synergy between [PdIICl4]2− and [CuIICl4]2− is initiated by the presence of a saccharide. In the absence of a saccharide, the spectroscopic features of [PdIICl4]2− and [CuIICl4]2− in their paired solution show little change with respect to those of individual metal chloride solutions. The evolution of a highly active heterometallic PdII–Cl–CuI complex from paired PdCl2–CuCl2 in the presence of saccharides is revealed by the transition of the FIR absorption peak of PdII–Cl. Glycolaldehyde as the simplest model compound, which is the same as the reducing end group of saccharides, is applied to determine the possible catalytic species. X-ray absorption spectroscopy (XAS) verifies that [CuIICl4]2− is reduced to [CuICl3]2− by glycolaldehyde. The HCl generated from reduced [CuIICl4]2− is also found to contribute to the hydrolysis of cellobiose, serving as another catalytically active species in paired PdCl2–CuCl2/[BMim]Cl. Paired PdCl2–CuCl2 pretreated with glycolaldehyde exhibits dramatically higher activity than direct use of paired PdCl2–CuCl2 in cellobiose conversion. Strikingly, the PdII–Cl–CuI complex is found to be substantially more active than HCl in the hydrolysis of β-1,4-glycosidic bonds as evidenced by the sustained high cellobiose conversion after neutralization of HCl with NaOH.
研究领域:
催化
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化学工程
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材料科学
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分析化学
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产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 43
·21435-21444
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IF 9.931
Haoxin Wang,Ze Yu,Jianbo Lai,Xinkai Song,Xichuan Yang,Anders Hagfeldt,Licheng Sun
The low-cost and stable inorganic p-type semiconductor copper(I) iodide (CuI) is a promising hole-transporting layer (HTL) material for inverted planar perovskite solar cells (PSCs). However, the power conversion efficiencies (PCEs) of inverted planar PSCs based on CuI HTLs reported so far are not satisfactory and far behind those of their organic counterparts. Herein, we demonstrate a simple but effective approach to improve the performance of inverted planar PSCs based on the CuI HTL through the incorporation of copper thiocyanate (CuSCN) into the CuI HTL. As compared to pristine CuI, the introduction of CuSCN significantly improves the quality of the film, resulting in a smooth and uniform film while maintaining relatively high electrical conductivity. As a consequence, the champion device based on the composite CuI/CuSCN HTL affords an impressive PCE of 18.76% under full sun illumination (100 mW cm−2, AM 1.5G), which is substantially higher than the corresponding values of the respective devices containing pristine CuI (14.53%) and CuSCN (16.66%). This value is one of the highest efficiencies reported thus far for CuI- and CuSCN-based HTLs in PSCs. This work demonstrates the great potential of low-temperature solution-processed CuI/CuSCN composites as hole-selective layers for low-cost and efficient PSCs as well as other optoelectronic devices.
研究领域:
材料科学
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能源技术
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光电子学
✓ 已验证
产品关联
DOI
高影响因子
MAIN GROUP CHEMISTRY
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2020
·Vol. 19
·期 3
·217-225
·
IF 0.845
Qiao Gui-Ying,Li Su-Min,Niu Yun-Yin
One new compound consisting of 1,1-bis(4-pyridylthio)methylene ([Bpytm]) ligand, namely [Bpytm]CuI (1), has been prepared and characterized by IR spectroscopy, solid Uv-visible diffuse reflectance spectrum, and X-ray Powder Diffraction (PXRD). Compound 1 is a 2D MOF and ligand [Bpytm] coordinate with metal ions to form tetrahedral configuration. For compound 1: Crystal system: Monoclinic, Space group: C2/c, a = 13.6671(11), b = 11.6075(11), c = 17.1225(12), α= 90°, β= 93.707(3)°, γ= 90°, V = 2710.6(4) Å3, Z = 8, Dcalc = 2.082 g cm–3. The photocatalytic properties and thermal stability have been researched.
研究领域:
无机化学
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材料科学
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光化学
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2026
·
IF 9.6
Yi Zhao,Yidong Hu,Yingchun Guo,Kai Ge,Binyuan Liu,Yongfang Yang
In-situ construction of a Ti 3 C 2 T x @MOF heterojunction with the heterovalent Cu 2+ /Cu + sites. • Exceptional CO production rate of 141.6 μmol·g −1 ·h −1 via synergistic photothermal and pseudo-greenhouse effects. • The proper ratio of Cu 2+ /Cu + endows the 2D Ti 3 C 2 T x @MOF-CuII/CuI heterojunctions with good cyclic catalysis. • DFT reveals Cu + sites facilitate CO 2 adsorption and reduce energy barrier in the rate-determining step during CO 2 reduction. The direct photocatalytic reduction of CO 2 into valuable chemicals and fuels using non-precious metal catalysts offers a promising strategy to address the energy crisis and mitigate carbon emissions. However, designing highly efficient photocatalysts remains a significant challenge. In this work, we fabricate two-dimensional (2D) Ti 3 C 2 T x @MOF-CuII/CuI heterojunctions that exhibit a CO evolution rate of 141.6 μmol·g −1 ·h −1 , which is approximately 21.8 and 13.0 times that of pristine 2D Ti 3 C 2 T x and 2D MOF Cu, respectively. Furthermore, the synergistic combination of the photothermal effect of Ti 3 C 2 T x and the nanoscale pseudo-greenhouse effect of the MOF-Cu layers further enhances the photocatalytic activity of the heterojunction, surpassing that of previously reported MXene-based materials. Characterization and computational studies reveal that the high intrinsic reducibility of Ti 3 C 2 T x drives the reduction of about 53% of Cu 2+ to Cu + in the resulting 2D Ti 3 C 2 T x @MOF-CuII/CuI heterojunctions. The abundant Cu 2+ /Cu + sites are uniformly distributed throughout the heterostructure, leading to a reduced energy barrier for key reaction intermediates. In addition, the proper ratio of Cu 2+ /Cu + endow the 2D Ti 3 C 2 T x @MOF-CuII/CuI heterojunctions with good cyclic catalysis, thus realizing the continuous photocatalytic reduction. This study provides deep insights into the construction of heterovalent Cu 2+ /Cu + heterojunctions based on MOFs and MXene, enabling the highly efficient collaborative photothermal and photocatalytic CO 2 reduction. Schematic illustration of the 2D Ti 3 C 2 T x @MOF-CuII/CuI heterojunction for synergistic photothermal and photocatalytic CO 2 reduction. Download: Download high-res image (104KB) Download: Download full-size image
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DOI
高影响因子
Light-Science & Applications
·
2024
·Vol. 13
·期 1
·1-11
·
IF 20.6
Zhang Dingshuo,Zhu Meiyi,He Yifan,Cao Qingli,Gao Yun,Li Hongjin,Lu Guochao,Cui Qiaopeng,Shen Yongmiao,He Haiping,Dai Xingliang,Ye Zhizhen
Broadband electroluminescence based on environment-friendly emitters is promising for healthy lighting yet remains an unprecedented challenge to progress. The copper halide-based emitters are competitive candidates for broadband emission, but their high-performance electroluminescence shows inadequate broad emission bandwidth of less than 90 nm. Here, we demonstrate efficient ultra-broadband electroluminescence from a copper halide (CuI) nanocluster single emitter prepared by a one-step solution synthesis-deposition process, through dedicated design of ligands and subtle selection of solvents. The CuI nanocluster exhibits high rigidity in the excitation state as well as dual-emissive modes of phosphorescence and temperature-activated delayed fluorescence, enabling the uniform cluster-composed film to show excellent stability and high photoluminescent efficiency. In consequence, ultra-broadband light-emitting diodes (LEDs) present nearly identical performance in an inert or air atmosphere without encapsulation and outstanding high-temperature operation performance, reaching an emission full width at half maximum (FWHM) of ~120 nm, a peak external quantum efficiency of 13%, a record maximum luminance of ~50,000 cd m −2 , and an operating half-lifetime of 137 h at 100 cd m −2 . The results highlight the potential of copper halide nanoclusters for next-generation healthy lighting.
研究领域:
材料科学
·
光电技术
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纳米技术
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照明技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
·
2014
·Vol. 2014
·期 6
·975-985
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IF 2.965
Jing Zhang,Yongyong Wang,Xiaoli Zhao,Ye Liu
Graphical The ionic palladium complexes 1A – 4A ligated by imidazolium-based-phosphanes were prepared and shown, by single-crystal X-ray diffraction analyses, to be composed of Pd II -centered square-planar cations and OTf – counteranions. The complexes were tested as precatalysts for the homogeneous carbonylative Sonogashira coupling of aryl iodides with phenylacetylene. The stable ionic Pd II complexes 1A – 4A were synthesized through the complexation of PdCl 2 (MeCN) 2 with the phosphane-functionalized ionic liquids (FILs) 1 – 4 with π-acceptor character. Single-crystal X-ray diffraction analyses showed that 1A – 4A were all composed of Pd II -centred square-planar cations and triflate (OTf – , CF 3 SO 3 – ) counteranions. The complex cations in 1A – 3A possessed structural similarity to trans -PdCl 2 (PPh 3 ) 2 . The cation in 4A was a new Pd II -centered planar complex ligated by the phosphane–carbon anion–carbene (PCC) pincer in a tripodal manner. The stabilities of 1A – 4A were improved due to the intensive π-backbonding interaction between the Pd and P atoms. When complexes 1A – 4A were used as precatalysts for homogeneous carbonylative Sonogashira coupling of PhI with phenylacetylene free of CuI, 1A – 3A exhibited excellent catalytic behaviour with a TON of up to 1700 at a CO pressure of 0.5 MPa and moderate temperature of 100 °C, whereas 4A exhibited poor activity towards the transformation of PhI due to the high stability of 4A . The recycling experiments of 3A in [Bpy]BF 4 (as a solvent) indicated that 3A could be recycled for 5 runs with neither activity loss nor metal leaching into the organic phase. Complex 3A also proved to be a general precatalyst for the carbonylative Sonogashira couplings of a wide range of aryl iodides with phenylacetylene. The selectivity of the desired carbonylation product depended more on electronic effects than the steric effects of the substituents of the aryl iodides.
研究领域:
有机化学
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催化化学
✓ 已验证
DOI
高影响因子
DYES AND PIGMENTS
·
2023
·
IF 4.5
Zekun Shi,Yongning Wu,Xue Zhang,Yanyan Gao,Luqin Qiao,Qin Hou,Minglin Wang
Fluorescent cuprous iodide (CuI)-based coordination polymers (CuI-CPs) were widely used in the sensor field for high selectivity and sensitivity. Here, a new CuI-CP fluorescent probe was fabricated for the detection of spermine, spermidine and cysteine with dual-mode, which was capable of both convenient colorimetric analysis and ratiometric fluorescent detection. The fluorescence of CuI-CP solution was quenched and the solution changed from white to purple upon addition of spermine or spermidine, while the solution changed from white to yellow for cysteine. This probe exhibited selective, sensitive, rapid and linear response to spermine, spermidine and cysteine with a limit of detection of 0.57, 1.06 and 1.18 μM, respectively. Furthermore, cellulose acetate was used as the matrix to fabricate intelligent fluorescent film for real-time and visual monitoring the freshness of pork samples based on distinct fluorescence changes under UV light. This work realized a rapid, efficient, and profitable method for visually evaluating food quality.
研究领域:
分析化学
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材料科学
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食品科学
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Menglin Li,Xinpeng Wang,Jian Zhang,Yonghao Gao,Wen Zhang
The capture of toxic radioiodine is an increasingly important priority for the safe development of nuclear energy. Copper is a promising alternative for expensive silver to capture iodine. To develop novel copper-based adsorbents and determine the effect of copper species on iodine adsorption, the metal–organic framework with dual-pyrazole ligands (MOF-303) is employed as the scaffold to bind Cu 2+ species. Cu 0 nanoparticles were formed after the reduction by NaBH 4 . The obtained Cu 2+ -MOF-303 and Cu 0 -MOF-303 show high iodine uptake capacities at 353 K, 747 mg·g −1 and 837 mg·g −1 , respectively. They also show high iodine uptake capacities of more than 300 mg·g −1 at a high temperature (423 K), which are better than other Cu-based adsorbents. Besides, the loading of Cu can enhance the iodine selectivity under humid vapor, and iodine adsorption rate in iodine-cyclohexane solutions. The Cu 0 on Cu 0 -MOF-303 can react with iodine directly via the redox mechanism. For Cu 2+ -MOF-303, the adjacent pyrazole ligands can chelate with Cu 2+ ions strongly and transfer charges to trapped iodine to form polyiodide anions, and thus stable CuI species could also be generated. The strategy of anchoring Cu species using MOF-303 provides large channels for iodine diffusion, and highly-dispersed Cu and N sites for iodine capture.
研究领域:
核能
·
材料科学
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环境科学
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化学工程
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）