CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Mengfeifei Jin,Weijie Zhou,Wenqiang Ma,Qin Wang,Xiaojuan Liang,Peiqing Zhang,Weidong Xiang
In the era of big data, the large amount of data generated every second requires modern and advanced data storage technologies. Femtosecond (fs) laser induced crystallization allow for the realization of fixed-point crystallization inside the CsPbBr 3 nanocrystals glasses (CPB), which can be applied in data storage. However, CPB is prone to self-crystallization prior to further heat treatment, interfering with fs-induced crystallization inside the glass and seriously hindering its application in data storage. Herein, we first propose the inhibition of CPB from self-crystallization by modulating the content of ZnO (4–20 mol%) using a melt-quenching method. ZnO was employed as a network modifier and was closely related to the glass network structure. When the content of ZnO was 4%, the CPB did not self-crystallize and was colorless. It was applied in the rewritable data storage by combining the 800 nm fs laser-induced crystallization, annealing (460 ℃/0.5 h) and fs laser erasing (20 mW). This work demonstrates a simple and efficient way to control the self-crystallization of CPBs, enhancing their potential practical application in high-capacity optical data storage with ultra-long working lifetimes.
研究领域:
材料科学
·
光学工程
·
信息存储技术
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Jingwei Zhu,Yu Liu,Benlin He,Wenyu Zhang,Lifang Cui,Sudong Wang,Haiyan Chen,Yanyan Duan,Qunwei Tang
The back interface issues including numerous defects and imperfect contact, mismatched energy level are regarded as the key detrimental factors causing serious charge recombination and energy loss ( E loss ) and inferior charge extraction to achieve high efficiency Hole transport materials-free (HTMs-free) carbon-based Perovskite solar cells (PSCs). To address this drawback, an effective interface engineering via depositing N, N'-Dicyclohexylcarbodiimide (DCC) at PVSK/Carbon back interface is creatively implemented to passivate CsPbBr 3 surface defects through forming interaction between N atoms with lone pair electrons and uncoordinated ions (eg Pb 2+ and Cs + ions) to suppress the defect states induced non-radiative recombination and E loss . Concurrently, the smoothness and valence band of PVSK film with DCC modification are increased to improve the contact and band alignment at back interface, respectively, remarkably accelerating hole extraction and transportation and also reducing E loss as well as charge recombination. As a result, the comprehensive performance of DCC interface modified HTMs-free carbon-based CsPbBr 3 PSCs is significantly enhanced, especially the champion efficiency boosts to 10.16% from 6.60% of the control PSC. Furthermore, owing to the enhanced hydrophobicity and decreased imperfections of PVSK film with DCC modification, the optimized device without any encapsulation displays an excellent long-term stability under 85% RH air condition at 85 °C over 1200 h.
研究领域:
材料科学
·
光伏技术
·
界面化学
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DOI
高影响因子
PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION
·
2023
·Vol. 40
·期 8
·2300032
·
IF 2.7
Hao Jiang,Chenxi Zang,Yixiu Dong,Min Lai,Shuhong Xu,Jingkun Xu
CsPbX 3 (X = Cl, Br, I) nanocrystals (NCs) are competitive materials for a wide range of applications because of their outstanding optoelectronic properties. Ion doping has been demonstrated as one powerful method for improving the optical properties of CsPbX 3 NCs. However, the conventional ion-doping approaches are tedious, and generally performed under an inert atmosphere and high temperature. In this work, a one-step ultrasonic-assisted approach is demonstrated to prepare doped CsPbX 3 NCs. To demonstrate the universality of the ultrasonic-assisted ion-doping approach, three ion-doped perovskite NCs are prepared, which represent three common improvements effects of ion doping on perovskite NCs, namely improved stability, PL emission, and photoluminescence quantum yields (PLQYs) of perovskite NCs. Sr-doped CsPbI 3 NCs showed improved phase stability. Mn-doped CsPbCl 3 NCs showed dual-color emissions at 406 and 580 nm. The PLQYs of the as-prepared Ni-doped CsPbCl 3 NCs are greatly improved, from 10.1% to 71%. Such a simple and versatile ion-doping approach may promote the practical applications of all-inorganic perovskite NCs.
研究领域:
材料科学
·
纳米技术
·
光电子学
·
无机化学
·
半导体材料
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Bo Gao,Hai-Rong Yu,Hui-Yao Zhang,Ting Liang,Chang-Jing Cheng
As the risk of radioactive waste generated in large quantities is emerging, rapid and selective removal and decontamination of cesium ions (Cs + ) from nuclear waste have become a significant issue for environmental protection and human health. Herein, a novel potassium copper hexacyanoferrate (KCuHCF)-embedded poly(acrylic acid)/laponite (PAAc/Lap-HCF) hydrogel has been developed by a facile and low-cost fabrication route for highly effective and selective Cs + adsorption. The diffusion-derived KCuHCF formation in the nanocomposite hydrogel via layer-by-layer (LBL) assembly can facilitate the preservation of the 3D-interconnected hydrogel structure and the dispersion of KCuHCF particles, which contribute to high-density immobilization of stable KCuHCF (~57.73 wt%) in the matrix. The adsorbent shows enhanced Cs + removal properties in terms of fast kinetics (>90% removal for 20 mg/L of Cs + within 1 h), stability (>115 mg/g in wide pH value of 2–11), high adsorption capacity (146.22 mg/g) and selectivity ( K d = 1.3 ×10 5 mL/g, 1 mg/L Cs + in highly competitive seawater). Such excellent characteristics with fast kinetics are mainly due to the high ion accessibility from the inherent nature of hydrogels and the highly loaded KCuHCF particles in the composites. The adsorption kinetics and isotherm obey the pseudo-second-order model and the dual-site Langmuir adsorption model, respectively. This nanocomposite hydrogel prepared in our work shows enhanced performance on removal of Cs + in aqueous solution, which has a good application prospect in treating radioactive wastewater .
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 38
·21844-21851
·
IF 3.049
Liqiang Yi,Yan Wang,Yini Fang,Ming Zhang,Juming Yao,Lina Wang,Jaromir Marek
It is of great significance to develop phase change materials (PCMs) with high performance. The reported PCMs usually possess serious defects like low heat capacity and poor thermal stability. Here, core–sheath structured nanofibers with polyvinyl butyral (PVB) as the sheath and octadecane as the core were fabricated by melt coaxial electrospinning. Pure octadecane without any solvents was used as the core solution, thus, the optimal sample possessed very high latent heat up to 118 J g−1. We studied the influence of core feed rate and PVB solution concentration on the encapsulation rate, and the highest encapsulation rate was found when the PVB concentration was 10% and core feed rate was 0.08 mL h−1. And hexagonal cesium tungsten bronze (CsxWO3, a near infrared absorber) was introduced into the optimal sample partly to improve its conversion efficiency of solar to thermal energy, and partly absorb uncomfortable infrared light; the composite phase change material also possessed high latent heat up to 96.9 J g−1. In addition, 100 thermal cycle test proved that with a minor latent heat decrease, the prepared core–sheath structured smart nanofibers had good thermal stability, which overcomes the leakage problem of pure octadecane. Additionally, the 9 wt% CsxWO3-loaded sample had an increase in tensile strength and elongation compared with the sample without CsxWO3, indicating the good compatibility between CsxWO3 and PVB.
研究领域:
材料科学
·
纺织工程
·
高分子物理
·
能源存储
·
功能材料
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DOI
高影响因子
Journal of Physical Chemistry Letters
·
2022
·
IF 6.888
Mengyuan Liu,Le Ma,Kehan Xie,Piaopiao Zeng,Shijing Wei,Feng Zhang,Chao Li,Feijiu Wang
Cesium lead halide perovskite (CsPbX3, X = Cl, Br, and I) nanocrystals (NCs) have attracted enormous attention because of their great potential for optoelectronic applications, such as light-emitting diodes (LEDs). However, the photoluminescence and surface ligands of CsPbX3 NCs have a great impact on their device applications. Herein, we report a molecular superacid of bis(trifluoromethane)sulfonimide (TFSI), which could boost the photoluminescence in the metal halide perovskite nanocrystals. In particular, the photoluminescence quantum yield (PLQY) of CsPbI3 nanocrystals could be greatly improved from 28.6% to near 100% with the superacid treatment. The improved PLQY in CsPbX3 nanocrystals is mainly contributed from the surface passivation based on the characterizations. The CsPbX3 nanocrystals were further modified with PMMA, which could greatly improve their stability while preserving high photoluminescence and good dispersion. The use of superacid combined with a polymer for improving the photoluminescence and stability in CsPbX3 provides an alternative strategy for optoelectronics.
研究领域:
材料科学
·
纳米技术
·
光电子学
·
化学
✓ 已验证
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2025
·
IF 6.3
Ping Yu,Zemin He,Yuzhen Zhao,Wenqi Song,Zongcheng Miao
The problem of energy consumption in buildings is getting more and more attention. As a result, developing a smart window with electrically adjustable visible light transmittance while also providing near-infrared (NIR) shielding is extremely important. Herein, A smart window was developed that simultaneously regulates visible light transmittance and provides NIR shielding by co-doping polymer dispersed liquid crystal (PDLC) with cesium tungstate modified with thiol groups (CsxWO 3 -SH) and thermochromic microcapsule (TM). The PDLC with the synergistic effect of CsxWO 3 -SH and TM has lower saturation voltage (V sat ) and better contrast than the PDLC doped with CsxWO 3 -SH and TM alone. In addition, the transmittance of the PDLC samples containing 4 wt % CsxWO 3 -SH nanoparticles and 7 wt % TM under visible light can be controlled between 3 % and 48 %, and can obstruct over 90 % of the NIR radiation. The results of thermal insulation suggest that the temperature of the conventional PDLC is 5.56 °C higher than that of the co-doped PDLC after 60 min of sunlight exposure, demonstrating that the co-doped PDLC film possesses superior visible light modulation and NIR shielding capabilities. This research will establish a solid foundation for the advancement of energy-efficient smart windows for buildings.
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产品关联
DOI
高影响因子
Micromachines
·
2025
·Vol. 16
·期 4
·379
·
IF 3
Xinyu Gao,Zihao Gao,Zhen Sun,Ping Song,Xiyuan Feng,Zhixin Jin
Lead halide perovskite solar cells (PSCs) have shown tremendous progress in the last few years. However, highly toxic Pb and its instability have restricted their further development. On the other hand, antimony-based perovskites such as cesium antimony iodide (Cs3Sb2I9) have shown high stability but low power conversion efficiency (PCE) due to the limited transfer of photocarriers and the poor quality of films. Here, we present a novel method to improve the performance of Cs3Sb2I9PSCs through a FACl-modified buried interface. FACl acts as a bi-functional additive, and FA incorporation enhances the crystallinity and light absorption of films. Furthermore, treatment with FACl optimizes the level position of Cs3Sb2I9. In addition, transient photovoltage and transient photocurrent were employed to confirm the reduction of charge recombination and superior carrier transportation. By using a planar device structure, we found the PCE of a FACl–Cs3Sb2I9-based device to be 1.66%. The device, stored for 2 months under N2conditions, showed a negligible loss in PCE. Overall, this study provides a new strategy to further enhance the performance of Sb-based PSCs.
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产品关联
DOI
PubMed
高影响因子
Journal of Energy Chemistry
·
2020
·
IF 7.216
Qingwei Zhou,Jialong Duan,Yudi Wang,Xiya Yang,Qunwei Tang
Tin dioxide (SnO 2 ) is generally regarded as a promising electron-transporting layer (ETL) for state-of-the-art perovskite solar cells (PSCs), however, the ubiquitous oxygen-vacancy-related defects at SnO 2 surface and the large energy difference between conduction band of SnO 2 and perovskite layer undoubtedly cause severe charge carrier recombination, resulting in sluggish charge extraction efficiency and non-negligible open-circuit voltage ( V oc ) loss. Herein, a chlorine-containing TiO x Cl 4-2 x accessory layer is fabricated by immersing SnO 2 layer into the TiCl 4 aqueous solution to passivate the surface oxygen-vacancy-related defects of SnO 2 layer and to set an intermediate energy level at ETL/perovskite interface in all-inorganic cesium lead tri-bromine (CsPbBr 3 ) PSCs. Furthermore, the TiO x Cl 4-2 x layer also improves the infiltration of SnO 2 layer surface toward perovskite precursor for high-quality perovskite film. Finally, the hole-free, all-inorganic CsPbBr 3 PSC with a structure of FTO/SnO 2 /TiO x Cl 4-2 x /Cs 0.91 Rb 0.09 PbBr 3 /carbon achieves a champion efficiency of 10.44% with a V oc as high as 1.629 V in comparison to 8.31% for control device. Moreover, the optimized solar cell presents good stability in 80% humidity in air.
研究领域:
材料科学
·
太阳能
·
纳米技术
·
电化学
✓ 已验证
DOI
高影响因子
Energy & Environmental Materials
·
2025
·
IF 14.1
Xinmiao Li,Ying Li,Huifang Jiang,Yancheng Chen,Zhuangzhuang Ma,Zhifeng Shi,Di Chen,Guozhen Shen
All-optically controlled artificial synapses for neuromorphic vision offer unique advantages in simplifying circuit design and minimizing power consumption, meeting the application demands of the current artificial intelligence era. However, developing all-optically controlled devices that combine high performance and high reproducibility remains a significant challenge. In this work, we demonstrate an all-optically controlled artificial synapse based on ZnO and Cs 2 CoCl 4 single crystal connected structure, which integrates light information sensing and processing capabilities. Relying on the simple series-connected structure, as well as the positive photoconductance of ZnO and the negative photoconductance of Cs 2 CoCl 4 , the optically controlled bidirectional synaptic plasticity is realized under ultraviolet and visible light stimulation without additional voltage modulation in the all-optically controlled synapse. In addition, leveraging its ultraviolet-enhanced feature extraction and visible-suppression capabilities, the all-optically controlled synapse can act as denoising units in bioinformation preprocessing and weight-updating units in feature recognition. The proposed all-optically controlled synapses exhibit excellent information perception, low-level noise reduction, and high-level cognition functions for bioinformation recognition under complex light conditions. We believe that this work can provide structural-level insights and inspirations in the design and fabrication of all-optically controlled synapses to promote the application for efficient neuromorphic vision in the future.
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产品关联
DOI
高影响因子
Functional Materials Letters
·
2024
·
IF 1.2
Zhuqing Sun,Yongxia Li,Haowen Bai,Shenghang Jin,Haibo Zhang,Guanying Cao
All inorganic lead halide cesium perovskite quantum dots (QDs) have attracted much attention due to their excellent luminescence properties, but further development is restricted by their stability and the existence of toxic element lead. In this paper, F/Mn-doped CsPb ( Br / Cl ) 3 QDs glass was prepared by melt quenching and heat treatment, with reduced Pb content effectively. The result shows that the spectrum of the QD glass is adjustable between 450 nm and 515.4 nm by changing the feeding ratio of Mn-Pb ion and heat treatment temperature. Moreover, the indraught of Mn 2 + effectively improves the PLQY of CsPb ( Br / Cl ) 3 QDs glass and serves as a red-emitting. The prepared composites not only maintain good fluorescence characteristics, but also greatly improve the stability of QDs. And successfully coupled with blue LED chips to synthesize WLED, Under 20 mA current, the color coordinate is (0.3446, 0.3389).
研究领域:
材料科学
·
纳米技术
·
光电子学
·
固体物理
·
无机化学
✓ 已验证
DOI
高影响因子
Science China-Materials
·
2023
·Vol. 66
·期 5
·1810-1819
·
IF 8.1
Xiao Hongbin,Qian Qingkai,Zang Zhigang
Recently, all-inorganic cesium lead halide (CsPbX 3 (X = Cl, Br, and I) perovskite nanocrystals (NCs) have been extensively investigated for photocatalytic carbon dioxide (CO 2 ) reduction reaction (CO 2 RR). However, because the pristine CsPbX 3 NCs suffer from severe radiative recombination, it is imperative to elaborately design heterostructures to separate electron-hole pairs for achieving efficient CO 2 RR. Herein, palladium (Pd) nanoparticles (NPs) are anchored on CsPbBr 3 NCs by a photo-assisted approach for the first time. The as-prepared CsPbBr 3 @Pd NCs not only build Schottky junctions at the CsPbBr 3 /Pd interfaces that promote the carrier separation and suppress the radiative recombination, but also exhibit lower energy barriers for photocatalytic CO 2 RR than pristine CsPbBr 3 NCs according to the density functional theory calculations. The electron consumption rate reaches a striking peak of 46.2 µmol g −1 h −1 by using CsPbBr 3 @Pd NCs as photocatalysts for CO 2 RR, which is 4.8-fold of the counterpart of pristine CsPbBr 3 NCs. This work not only presents a photo-assisted strategy for anchoring Pd NPs on CsPbBr 3 NCs, but also demonstrates the great potential of using CsPbBr 3 @Pd NCs for photocatalytic CO 2 RR.
研究领域:
材料化学
·
光催化
·
纳米材料
·
环境化学
·
能源化学
·
半导体物理
·
催化化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）