Small
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2024
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IF 13
Haoran Pang,Shijie Du,Junpeng Deng,Wei Kong,Yilun Zhao,Bohong Zheng,Lin Ma
The interfacial 2D/3D perovskite heterostructures have attracted extensive attention due to their unique ability to combine the high stability of 2D perovskites with the remarkable efficiency of 3D perovskites. However, the carrier transport mechanism within the 2D/3D perovskite heterostructures remains unclear. In this study, the carrier transport dynamics in 2D/3D perovskite heterostructures through a variety of time-resolved spectroscopic measurements is systematically investigated. Time-resolved photoluminescence results reveal nanosecond hole transfer from the 3D to 2D perovskites, with enhanced efficiency through the introduction of fluorine atoms on the phenethylammonium (PEA) cation. Transient absorption measurements unveil the ultrafast picosecond electron and energy transfer from 2D to 3D perovskites. Furthermore, it is demonstrated that the positioning of fluorination on the PEA cations effectively regulates the efficiency of charge and energy transfer within the heterostructures. These insightful findings shed light on the underlying carrier transport mechanism and underscore the critical role of cation fluorination in optimizing carrier transport within 2D/3D perovskite heterostructure-based devices.
研究领域:
材料科学
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光伏技术
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半导体物理
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
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IF 13.3
Kanghou Ma,Yitao He,Xinyue Zhao,Sunfa Wang,Ge Zhang,Chen Wang,Fangshuo Zhou,Wei Shi,Yaohui Zhang
Silicon (Si) stands as a promising candidate for high-capacity anode materials in the next-generation lithium-ion batteries (LIBs) due to extremely high specific capacity. However, silicon application is hindered by its inherently poor electron and ion conductivities, as well as structural instability during the repeated charging/discharging. To address these challenges, a novel functional surface modification agent, diethylenetriaminepenta(methylenephosphonic) acid (DTPMP), was decorated on the surface of silicon particles for the first time. The experimental results demonstrate that the DTPMP effectively enhances the cohesion between nano Si particles. This study combines experimental observations with theoretical calculations to analyze the nucleophilic and electrophilic sites of DTPMP and carboxymethyl cellulose (CMC), elucidating the existence state of DTPMP on the nano Si surface. Furthermore, by examining the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO), along with the electrostatic potential (ESP) of DTPMP and solvent molecules in conjunction with Li + , the impact of the phosphate group on the diffusion of Li + and electrons at the nano Si surface was studied. The electron density difference (EDD) maps for DTPMP and CMC reveal that DTPMP exhibits a more pronounced response in the presence of an electric field, suggesting its enhanced role in facilitating Li + diffusion. This research offers a novel perspective on enhancing the electrochemical performance of nano Si surfaces, paving the way for the development of advanced LIBs with improved energy storage capabilities.
研究领域:
材料科学
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电化学
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DOI
高影响因子
Advanced Materials Interfaces
·
2020
·Vol. 7
·期 10
·1902190
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IF 4.948
Jianda Lin,Xiangbin Yin,Hao Pang,Lei Zhang,Bing Liao,Mingliang Xin,Yu Su,Yang Liu,Lian Wu,Kangle Jia,Benbin Zhong,Yuliang Mai,Yongqiang Dai
Due to the high in-plane Young's modulus and defects, graphene is prone to deformations such as wrinkles. The effects of wrinkles on the mass and electron transport properties need to be elucidated as graphene has great potential in applications such as catalysis, sensors, energy storage, and conversion. In this paper, the wrinkling of graphene oxide sheets is dominated by the mass ratio of graphene oxide to N , N ′-dicyclohexylcarbodiimide (DCC) to fabricate 3D graphene architectures (TDGAs) with tunable porosity. This template-free DCC tactic of regulating the wrinkling procedure forms hierarchical porosity and modulates the exposure of defect sites. Considering the confinement effect of the wrinkles and defect sites, orthorhombic phase Nb 2 O 5 ( T -Nb 2 O 5 ) nanoparticles are loaded onto TDGAs, and as-obtained T -Nb 2 O 5 @TDGAs composites exhibit favorable properties of Li-ion and electron transport after the wrinkle structures are optimized. The DCC tactic manifests excellent performance in manipulating mass transport properties through tuning the wrinkles on TDGAs-based composites, which may greatly contribute to graphene based materials with high performances in energy storage.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
Nano-Micro Letters
·
2024
·Vol. 16
·期 1
·1-19
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IF 31.6
Zhao Xiaomeng,Zhang Heng,Chan Kit-Ying,Huang Xinyue,Yang Yunfei,Shen Xi
Inspired by transport system in trees, a two-way water and salt transport mechanism is realized in a structurally graded aerogel, enabling simultaneous fast water uptake and salt rejection.
The horizontally aligned pore channels near the surface achieve excellent heat localization by maximizing solar absorption and minimizing heat loss.
The integrated water, salt, and thermal transports impart an impressive evaporation rate of 1.94 kg m −2 h −1 in a 20 wt% NaCl solution for 8 h without salt accumulation.
研究领域:
材料科学
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能源工程
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仿生学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Yishun Wang,Yufeng Zeng,Zili Lin,Xiaoyu Zhang,Yu Chen,Ping Chen,Wenying Lv,Guoguang Liu
For this work, a novel heterogeneous PhC 2 Cu/ZnO, function of facilitating unidirectional exciton transport, was successfully constructed. Leveraging ZnO’s robust electron transfer capability, highly efficient delocalization of photogenerated electrons, and rapid separation of photogenerated carriers from PhC 2 Cu was achieved, leading to improved photocatalytic performance. Remarkably, the addition of just 5 % ZnO enhanced the photocatalytic degradation ability of ciprofloxacin (CIP) by 4.24 times (15 min, 95.2 %). In addition, the issues related to the wide bandgap and photocorrosion of ZnO were effectively circumvented through our designed strategy. Meanwhile, the electron delocalization effect within PhC 2 Cu enhances its molecular stability, which in turn improves the photocatalyst’s performance and long-term recyclability. Moreover, the impact of different ZnO morphologies on exciton transport was systematically investigated, with the core–shell structure identified as most conducive to efficient interface electron transfer. Through in-situ XPS analysis, the exciton unidirectional transport effect was directly demonstrated.
研究领域:
材料科学
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环境科学
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化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Jiacheng Cao,Min Zhu,Xuefeng Lu,Faqi Zhan,Yuehong Zheng,Peiqing La
One of the key strategies for enhancing the thermoelectric figure of merit (ZT) is the simultaneous optimization of electron and phonon transport. In this work, (Sr 0.25 Ba 0.25 La 0.25 Pb 0.25 ) 1-x Nb 2 O 6-δ (0 ≤ x ≤ 0.15) ceramics were synthesized via the solid-state reaction method. By introducing a series of A-site defects into the high-entropy system, configurational entropy was modulated to optimize thermoelectric performance. As the value of x increased, both electrical resistivity and thermal conductivity exhibited significant reductions. Due to the synergistic effect of relatively high power factor (PF) and low thermal conductivity (κ), the sample with x = 0.1 achieved a peak ZT value of 0.19 at 1073 K, representing a 137.5 % enhancement over the stoichiometric ceramic sample. This research demonstrates that in the distorted tetragonal tungsten bronze structure, enhanced crystal symmetry facilitates electron delocalization, thereby improving electrical transport properties. Additionally, defects, including edge dislocations confirmed by scanning transmission electron microscopy analysis, increase the likelihood of random scattering events, leading to a reduction in lattice thermal conductivity. This study demonstrates that in (Sr 0.25 Ba 0.25 La 0.25 Pb 0.25 )Nb 2 O 6−δ high-entropy ceramics, the synergistic modulation of A-site defect concentration and configurational entropy effectively optimizes electron and phonon transport properties , thereby achieving a peak ZT value of 0.19.
研究领域:
材料科学
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物理学
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
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2021
·
IF 9.229
Zhanxiang Yin,Zhongyuan Liu,Yuan Yu,Cunyin Zhang,Peng Chen,Jianxun Zhao,Pan He,Xin Guo
Polycrystalline BiCuSeO is considered as a promising thermoelectric material due to its intrinsically low thermal conductivity and moderate Seebeck coefficient. However, its low electrical conductivity and coupled electron–phonon transport properties restrict the further improvement of the thermoelectric performance. In this work, Pb and Yb dopants are incorporated into BiCuSeO to substitute for Bi sites via ball milling and high-pressure and high-temperature sintering, leading to a synergistic optimization of the electron and phonon transport and improved thermoelectric performance. The carrier concentration exhibits an enhancement with increasing Pb&Yb co-doping contents. Meanwhile, the decreased carrier mobility is suppressed appropriately by coordinating with the interplay of Pb and Yb dopants on the electronic structure. Besides, Pb&Yb co-doping combined with high-pressure and high-temperature sintering introduces abundant grain boundaries, dislocations, and point defects to effectively decrease the lattice thermal conductivity by scattering phonons in a broad frequency range. Coupled with the synergistic optimization of the electrical and thermal properties, a maximum zT of 1.2 is achieved in Bi0.88Pb0.06Yb0.06CuSeO at 850 K, which significantly outperforms the majority of oxygen-containing thermoelectric materials. Our study suggests that dual doping of bivalent ions and rare-earth elements at Bi sites is an effective strategy for improving the thermoelectric performance of BiCuSeO.
研究领域:
材料科学
·
热电材料研究
✓ 已验证
DOI
高影响因子
Nano-Micro Letters
·
2020
·Vol. 13
·期 1
·1-13
·
IF 12.264
Wu Wenting,Fang Huajing,Ma Hailong,Wu Liangliang,Zhang Wenqing,Wang Hong
MXene/WO 3− x composite film with excellent electrochromic performances was fabricated for the first time.
The addition of MXene is an effective strategy for simultaneously enhancing electron and ion transport behaviors in the electrochromic layer.
The kinetics of ion diffusion in electrochromic devices are studied in depth based on both experiment and simulation.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Solar RRL
·
2021
·Vol. 5
·期 9
·2100494
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IF 8.582
Juntian Zhou,Ru Zhou,Jun Zhu,Ping Jiang,Lei Wan,Haihong Niu,Linhua Hu,Xi Yang,Jinzhang Xu,Baomin Xu
The cadmium sulfide (CdS) is a promising electron transport layer (ETL) material for perovskite solar cells (PSCs) due to its low photocatalytic activity toward perovskite materials under UV light. The critical problem responsible for the moderate performance of CdS-based PSCs is the parasitic light absorption of CdS, which drives researchers to deposit ultrathin ETLs. However, the ultrathin ETL often involves the undesirable shunt current leakage because of the direct contact between conducting substrate and perovskite layer. Herein, a fully low-temperature solution-processed colloidal SnO 2 -assisted CdS (S-CdS) ETL for planar CH 3 NH 3 PbI 3 PSCs is constructed. The detailed characterizations of morphological, optical, and energy levels confirm that the assistance of colloidal SnO 2 provides the ameliorated continuity, reduces surface roughness and superior wettability of ETLs for high-quality perovskite formation as well as the favorable cascade band structure for efficient charge transfer. The study of charge transfer mechanisms reveals that the S-CdS ETL effectively inhibits the shunt leakage, promotes the electron extraction and suppresses the charge recombination at the ETL/perovskite interface. Consequently, the S-CdS ETL-based PSCs deliver an appreciable efficiency of 16.26%, doubling that of conventional CdS-based devices. To the best of our knowledge, this value is the champion efficiency reported for CdS-based CH 3 NH 3 PbI 3 PSCs.
研究领域:
材料科学
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能源科学
·
光电转换
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DOI
高影响因子
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Yongzhong Fu,Haitao Liu,Hongyu Liang,Lianshan Sun,Yongfeng Bu
Increasing the energy density ( E wt ) under large currents is always highly desired for supercapacitors using thick carbon electrodes. Herein, we report an ultra-thick carbon electrode composed of mesoporous carbon rods (MCR) with ultrahigh specific surface area. At 250 μm, it exhibits the highest capacitance ( C wt , 239 F g − 1 at 1 A g − 1 ) and C wt retention (53% at 100 A g − 1 ) in EMIMBF 4 as far as we know, and ultrahigh E wt (132 Wh kg −1 ) and achievable power density ( P wt , 74 kW kg −1 ). Even at ultra-thick 600 μm, its E wt and P wt are still up to 95 Wh kg −1 and 70 kW kg −1 , respectively, with the decay of C wt at 50 A g − 1 < 3% (much smaller than commercial carbon YP-50F). Such excellent performance is attributed to the unique MCR structure, i.e., the micron-sized rod-like frame structure consisted of interconnected carbon nanocages acting as axial electron channel, as well as the stacking pores formed by MCR serving as radial channels for ions, finally enabling electrons and ions to be rapidly transferred in the axial and radial directions, respectively. It fully demonstrates its potential application prospects in scenarios requiring high energy and high power at the same time.
研究领域:
材料科学
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能源存储
✓ 已验证
DOI
高影响因子
Nature Communications
·
2023
·Vol. 14
·期 1
·1-9
·
IF 16.6
Dong Hongzheng,Pan Xiangyu,Gong Yuancai,Xue Mengfan,Wang Pin,Ho-Kimura SocMan,Yao Yingfang,Xin Hao,Luo Wenjun,Zou Zhigang
In the past decades, a band alignment theory has become a basis for designing different high-performance semiconductor devices, such as photocatalysis, photoelectrocatalysis, photoelectrostorage and third-generation photovoltaics. Recently, a faradaic junction model (coupled electron and ion transfer) has been proposed to explain charge transfer phenomena in these semiconductor heterojunctions. However, the classic band alignment theory cannot explain coupled electron and ion transfer processes because it only regulates electron transfer. Therefore, it is very significant to explore a suitable design concept for regulating coupled electron and ion transfer in order to improve the performance of semiconductor heterojunctions. Herein, we propose a potential window alignment theory for regulating ion transfer and remarkably improving the photoelectrocatalytic performance of a MoS 2 /Cd-Cu 2 ZnSnS 4 heterojunction photocathode. Moreover, we find that a faradaic potential window, rather than the band position of the intermediate layer, is a criterion for identifying interface charge transfer direction. This finding can offer different perspectives for designing high-performance semiconductor heterojunctions with suitable potential windows for solar energy conversion and storage.
研究领域:
材料科学
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能源转换与存储
·
半导体器件
✓ 已验证
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Xiaorong Gan,Jianlin Zhang,Jiabei Liu,Yuanhe Bai,Xinyi Su,Weiqing Wang,Zhuang Cao,Huimin Zhao,Yanhui Ao,Peifang Wang
Simultaneously improving electron and mass transfer processes is full of challenges for electrode material design. To this end, three-dimensional (3D) porous electrode materials were obtained via covalent combination between defective 1T-MoS2 nanosheets and polyaniline (PANI) through hydrothermal/solvothermal processes and surface polymerization reactions. Our experimental results and density functional theory calculations jointly reveal that PANI molecules can not only intercalate into van der Waals (vdW) gaps of 1T-MoS2 nanosheets but also chemically adsorb onto S-vacancy clusters (via Mo–N covalent bonds), rather than single atomic S-vacancies due to steric effects. Similarly, the geometric structure of PANI in the vdW gaps of 1T-MoS2 nanosheets possesses a flat-lying configuration for better stability. Compared to surface functionalization, interlayer intercalation has more profound effects on electronic structures for improving electrochemical properties, including reduced band gaps, small effective electron masses, and high mobility. As a proof-of-concept application, the 1T-MoS2–PANI nanocomposites were used to construct an electrochemical sensor for trace Cu2+, which exhibits high sensitivity and selectivity with a wide linear range from 3 to 450 nM and a low detection limit because of excellent conductivity, a low contact barrier against electron transfer, high mass transfer, and strong coordination interactions between PANI and Cu2+.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）