CONSTRUCTION AND BUILDING MATERIALS
·
2024
·
IF 7.4
Kai Luo,Wensheng Zhang,Jiayuan Ye,Jun Li,Zhongyuan Lu,Xuehong Ren
The physical and microscopic properties of γ-C 2 S and β-C 2 S under hydration, carbonation , and hydration–carbonation cycle reactions were investigated. The hydration–carbonation cycle reaction facilitated the carbon sequestration of C 2 S, and the generation of CaCO 3 filled the pores of the matrix and enhanced the matrix density in the carbon fixation reaction process. In the subsequent hydration and reaction process, the formation of hydration products increased the number of pores in the matrix and reduced the matrix density. Post-hydration, γ-C 2 S slurry became powder and had no mechanical strength . However, after carbonation reaction and two carbonation–hydration cycles, γ-C 2 S exhibited better mechanical properties than β-C 2 S.
研究领域:
材料科学
·
硅酸盐化学
·
建筑材料
·
碳捕集与封存
·
无机非金属材料
✓ 已验证
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2022
·
IF 4.778
Zehan Liu,Pengpeng Cheng,Yongfei Li,Ruyan Kang,Jian Zhou,Jia Zhao,Zhiyuan Zuo
With the aim of addressing the growing challenge of approaching the end of Moore's law and von Neumann bottleneck, the evolution of neuromorphic computing based on memristors that emulate the behaviors of the brain has attracted great attention. Organic-inorganic hybrid lead halide perovskites with inherent hybrid ionic-electronic conduction ability have been proposed as promising candidates for memristors to replace traditional charge-based memory. Here we propose MA 0.85 Cs 0.15 PbI 3 memristors with high surface crystallinity and stable operation in the atmospheric environment by mixing inorganic cation Cs + and organic cation MA + . The prepared memristors present excellent resistive switching performances including low operation voltage, high ON/OFF ratio, stable endurance, long retention, and robustness under ambient condition. Besides that, four distinct resistance states have been obtained in the above devices by modifying the operation voltages. Moreover, the resistance switching processes can be controlled both by electrical field and light illumination. Finally, this research provides utilization potentiality in the optical and electrical two-dimension controlled multilevel information devices with a total of five stable resistance states. The present work would offer an effective way to develop multifunctional high-density data-storage applications by storing multiple resistance states in a single unit cell.
研究领域:
材料科学
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纳米电子学
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凝聚态物理
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信息存储技术
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类脑计算
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2024
·Vol. 59
·期 41
·19642-19650
·
IF 3.5
Chu Yican,Yao Zhendong,Liu Min,Li Wenqing,Gu Jing,Huang Zhenguang,Xie Jiaxing,Li Chao,Cui Yongfu,Li Yun,Fan Meiqiang
The hydrolysis of silicon and its compounds to produce hydrogen for fuel cell remains a major problem. The main obstacle is the weak hydrolytic activity and slow kinetics of silicon. In this work, the alloying properties of Si and Ca to improve its hydrolytic activity, and studied the film breaking effect of different metals and halogen ions on its passivation layer. The results show that the hydrogen production of the alloy is still determined by its phase composition. Among the common metal (Ni, Bi, Sn) and halogen ions (F – , Cl – ) catalyzed by hydrolysis, Ni and F – showed a good synergistic effect, resulting in a hydrogen yield of 269 mL/g at room temperature without alkali. Graphical
The effects of metal ions and halogens on the hydrolytic properties of Ca–Si alloy were investigated, and Ni 2+ and F — showed good synergistic effect.
研究领域:
材料化学
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能源材料
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无机化学
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氢能源
·
金属合金
✓ 已验证
DOI
高影响因子
SOLID STATE SCIENCES
·
2024
·
IF 3.4
Zhenlin Zhang,Meng Zhou,Noor Zaman,Haider Ali Tauqeer,Shuguang Cao,Shizi Luo,Xueqing Xu,Jiamei Mo,Xiaoli Chen,Qifan Xue,Zhiwei Ren,Gang Li,Ran Li,Xiaoqi Zhu,Lavrenty G. Gutsev,Sergey L. Nikitenko,Nikita A. Emelianov,Olga A. Kraevaya,Sergey M. Aldoshin,Pavel A. Troshin,H. S.U. Hsien-Yi
The carbon-based perovskite solar cells (C–PSCs) have attracted a lot of interest because of their low cost of fabrication and long-term stability. However, sluggish charge transfer kinetics and inadequate contact between perovskite (or hole transport layer) and carbon film typically hindered the performance of the device. Conventional 2D perovskite layer for surface passivation based on spin coating could lead to a non-uniform 2D perovskite layer due to the dissolution of FA + cations in isopropanol, undermining the interfacial contact of C–PSCs. Herein, carbon nanotubes (CNTs) were sprayed on the composite hole transport layer (HTL) of Spiro-OMeTAD and P3HT as top electrodes in C–PSCs. To improve the interfacial contact between CNT electrodes and HTLs and inhibit carrier recombination, a passivation agent of phenylethylamine iodine (PEAI) was added into the CNT paste and sprayed onto the HTL. According to thorough characterization, PEAI penetrated through the HTL and interacted with the perovskite film surface, forming uniform 2D perovskite layers that passivated the surface defects of 3D perovskite films. Because of the even 2D perovskite layer and compact interfacial contact, the C–PSCs with penetrated PEAI exhibited greatly enhanced photovoltaic performance , with the champion device achieving a power conversion efficiency (PCE) of 19.5 %, superior to those with directly spin-coated PEAI, which had a maximum PCE of 16.0 %. Furthermore, the device with penetrated PEAI exhibited optimized long-term stability due to the better passivation effect.
研究领域:
材料科学
·
能源技术
·
纳米科技
✓ 已验证
DOI
高影响因子
THIN SOLID FILMS
·
2018
·
IF 1.939
Chunfeng Lan,Huabin Lan,Guangxing Liang,Jun Zhao,Huanxin Peng,Bo Fan,Zhuanghao Zheng,Huibin Sun,Jingting Luo,Ping Fan,Yong Qing Fu
A new antisolvent method was developed to prepare CH 3 NH 3 PbI 3 and electron transport layers for making efficient hybrid perovskite solar cells . By directly using [6,6]-phenyl-C61-butyric acid methyl ester in chlorobenzene solution as antisolvent, CH 3 NH 3 PbI 3 and electron transport layers were simultaneously formed in the films. This method not only simplifies the fabrication process of devices, but also produces uniform perovskite films and improves the interfacial structures between CH 3 NH 3 PbI 3 and electron transport layers. Large perovskite grains were observed in these films, with the average grain size of >1 μm. The so-formed CH 3 NH 3 PbI 3 /electron transport layers demonstrated good optical and charge transport properties. And perovskite solar cells fabricated using these simultaneously-formed layers achieved a higher power conversion efficiency of 16.58% compared to conventional antisolvent method (14.92%). This method reduces nearly 80% usage of chlorobenzene during the fabrication, offering a more facile and environment-friendly approach to fabricate efficient perovskite solar cells than the conventional antisolvent method.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-8
·
IF 14.7
Geng Shitao,Zhao Xiaoju,Xu Qiuchen,Yuan Bin,Wang Yan,Liao Meng,Ye Lei,Wang Shuo,Ouyang Zhaofeng,Wu Liang,Wang Yongyang,Ma Chenyan,Zhao Xiaojuan,Sun Hao
Rechargeable calcium (Ca) metal batteries are promising candidates for sustainable energy storage due to the abundance of Ca in Earth’s crust and the advantageous theoretical capacity and voltage of these batteries. However, the development of practical Ca metal batteries has been severely hampered by the current cathode chemistries, which limit the available energy and power densities, as well as their insufficient capacity retention and low-temperature capability. Here, we describe the rechargeable Ca/Cl 2 battery based on a reversible cathode redox reaction between CaCl 2 and Cl 2 , which is enabled by the use of lithium difluoro(oxalate)borate as a key electrolyte mediator to facilitate the dissociation and distribution of Cl-based species and Ca 2+ . Our rechargeable Ca/Cl 2 battery can deliver discharge voltages of 3 V and exhibits remarkable specific capacity (1000 mAh g −1 ) and rate capability (500 mA g −1 ). In addition, the excellent capacity retention (96.5% after 30 days) and low-temperature capability (down to 0 °C) allow us to overcome the long-standing bottleneck of rechargeable Ca metal batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2020
·
IF 3.28
Chunxia Wu,Hongxiang Zhang,Shouzhi Wang,Wei Wang,Jun Dai
In this paper, we report a simple one-pot strategy to synthesize highly stable SiO 2 -coated orange-yellow CsPb 0.7 Mn 0.3 Br 0.75 Cl 2.25 quantum dots with strong orange-yellow photoluminescence . The microstructure characterization indicates that the CsPb 0.7 Mn 0.3 Br 0.75 Cl 2.25 quantum dots were effectively encapsulated by the SiO 2 . The SiO 2 -coated CsPb 0.7 Mn 0.3 Br 0.75 Cl 2.25 quantum dots show higher humidity stability and thermal stability than the CsPb 0.7 Mn 0.3 Br 0.75 Cl 2.25 quantum dots without SiO 2 coating. The white light-emitting diodes (WLEDs) were obtained by coating orange-yellow CsPb 0.7 Mn 0.3 Br 0.75 Cl 2.25 @SiO 2 and blue CsPbBrCl 2 @SiO 2 quantum dots on the ultraviolet gallium nitride light-emitting diode chip. The as-prepared white light-emitting diodes show bright white light emission with a color coordinate of (0.3347, 0.2825), color rendering index of 82 and correlated color temperature of 5329 K. The results provide a simple method to fabricate stable orange-yellow luminescent material for white light-emitting diodes.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2016
·
IF 4.732
Zhuoneng Bi,Zhurong Liang,Xueqing Xu,Zhisheng Chai,Hu Jin,Dehua Xu,Jingling Li,Minghua Li,Gang Xu
Spray deposition has been demonstrated to be a promising method to prepare perovskite thin film with many advantages, such as easy and processable under fully ambient condition, which is suitable for large-scale production. In this work, we reveal two typical spray deposition process of rapid and slow solvent evaporation . It is emphasized that the rapid solvent evaporation process is essential to avoid dendritic crystal and obtain dense perovskite thin film without pin-holes, which can be realized with a suitable substrate temperature . With optimized spray conditions including flow rate of precursor solution and carrier gas pressure, a dense and uniform perovskite layer with full surface coverage was immediately formed in ~5 s without any post-annealing process. The as-fabricated planar heterojunction solar cell achieved a power conversion efficiency (PCE) of 13.54% with 300±30 nm in thickness of perovskite layer. To the best of our knowledge, this result is the highest value for the CH 3 NH 3 PbI 3 perovskite solar cells fabricated in air condition with high humidity up to 50%.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
AIP Advances
·
2023
·Vol. 13
·期 6
·
IF 1.6
Tu Peng,Cai Xiangcheng,Ai Yansong,He Hongshen,Shen Peng,Zhou Yuanming,Mei Fei
Perovskite light-emitting diodes (PeLEDs) have attracted much attention due to their excellent performance. In this work, phenylethylamine bromide (PEABr) was employed to modify perovskite phases, while Poly(9-vinylcarbazole) (PVK) was added as a hole transport layer between perovskite and PEDOT:PSS to engineer the device structure, which is predicted to improve the optoelectronic performance of PeLEDs synergistically. The doping of PEABr in MAPbBr 3 can improve the radiative recombination of the emission layer through the formation of two-dimensional perovskite phases and modified film morphology. When the ratio of MAPbBr 3 :PEABr is 1:0.25, the maximum luminance of the optimal device increased from 80 to 9000 cd/m 2 and the maximum external quantum efficiency increased from 0.02% to 1.63% compared with the control device without PEABr doping. In addition, the hole injection ability of the device is further improved by adding PVK as the hole transport layer. The introduction of PVK can also facilitate the interface modification via surface defect passivation. When the PVK concentration is 10 mg/ml, the maximum current efficiency and external quantum efficiency of the optimal device are increased to 13.70 cd/A and 2.70%, respectively. These findings can provide a basis for the enhanced performance of PeLEDs.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Lili Ke,Xiaoyan Gan,Wenhui Zhao,Liling Guo,Hanxing Liu
At present, perovskite solar cells using two-dimensional perovskite hybrids have been researching, for their good optical performance and humidity stability work. However, there is still a great obstacle obtaining two-dimensional perovskite films of high quality and high performances. In this work, we succeeded in fabricating dense and highly crystallized Q-2D (C 6 H 5 C 2 H 4 NH 3 ) 2 FA n-1 Pb n I 3n+1 by adopting a novel two-step solution deposition method, from which a stoichiometric precursor containing PEAI and PbI 2 was first spin-coated and FAI solution was then dropped and spin-coated on the substrate. It was found that the amount of FAI solution dropped onto the substrate during the second step had great influence on the microstructure and performance of the Q-2D (C 6 H 5 C 2 H 4 NH 3 ) 2 FA n-1 Pb n I 3n+1 . Our first–generation Q-2D (C 6 H 5 C 2 H 4 NH 3 ) 2 FA n-1 Pb n I 3n+1 perovskite solar cells were higher than its 3D perovskite counterpart FAPbI 3 in moisture stability. We finally obtained Q-2D (C 6 H 5 C 2 H 4 NH 3 ) 2 FA n-1 Pb n I 3n+1 perovskite solar cells, showing an open-circuit voltage of 0.826 V and a power conversion efficiency of 11.46%.
研究领域:
材料科学
·
能源研究
✓ 已验证
DOI
高影响因子
Science Bulletin
·
2018
·
IF 4.136
Aqiang Liu,Kang Liu,Huimin Zhou,Hongmei Li,Xiaoqing Qiu,Yi Yang,Min Liu
Organic-inorganic hybrid perovskite solar cells (PSCs), due to their high power conversion efficiency (PCE) and low cost, have been considered as one of the most promising photovoltaic devices . Well-distributed large-grain perovskite crystals play an important role for light adsorption and charge transfer. While, high quality perovskite crystals closely relate to the preparation method. Generally, the preparation of perovskite films requires a nitrogen atmosphere and toxic anti-solvents, which hinder their practical applications. Here, we reported a novel and simple solution evaporation process followed with a methylammonium iodide (MAI) solution immersion to prepare high quality perovskite films. Porous lead iodide (PbI 2 ) films were firstly formed by evaporation of PbI 2 precursor solution . The obtained porous PbI 2 films were completely transformed into well-distributed large-grain perovskite films after a quick MAI solution immersion. As a result, the corresponding PCE was enhanced by 30% compared to that prepared with a regular sequential deposition. This solution evaporation method provides a convenient and practical way for preparing high-quality perovskite films.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
Nano Energy
·
2018
·
IF 13.12
Jiahuan Zhang,Yaqing Chen,Wanlin Guo
An electron transport layer for electron collection and transport from the perovskite photoactive layer is indispensable in high-performance of mesoscopic perovskite solar cells . A well-organized electron transport layer can significantly improve the quality of the deposited perovskite film, enhance the transport of electrons and help the extraction of electron-hole pairs, but the optimized structural constitution remains elusive. In this work, we find that the optimal performance of perovskite solar cells can be achieved by introducing a sub-nanometer compact titanium dioxide layer to the mesoporous electron transport layers as an ultrathin compact layer is enough to enhance electron extraction and reduce carrier recombination. It is shown that an efficiency around 18% can be reliably achieved at the optimized structural constitution of a 230-nm mesoporous TiO 2 layer as well as a compact TiO 2 layer in a large equivalent thickness ranging from sub-nanometer to 30 nm. The mesoporous layer is also important as the power conversion efficiencies of all the fabricated perovskite solar cells are less than 11.8% without it. The results shed light on fabrication perovskite solar cells with thinnest compact layer with optimized efficiency.
研究领域:
材料科学
·
能源科学
·
光伏技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）