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Non-destructive buffer enabling near-infrared-transparent inverted inorganic perovskite solar cells toward 1400 h light-soaking stable perovskite/Cu(In,Ga)Se_(2) tandem solar cells

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Journal of Energy Chemistry 2024年第10期97卷 622-629,I0013页

作者： Yu Zhang Zhaoheng Tang Zhongyang Zhang Jiahong Tang Minghua Li Siyuan Zhu Wenyan Tan Xi Jin Tongsheng Chen Jinsong Hu Chao Zhou Chunlei Yang Qijie Liang Xugang Guo Weimin Li Weiqiang Chen Yan Jiang MOE Key Laboratory of Laser Life Science&Guangdong Provincial Key Laboratory of Laser Life Science Guangzhou Key Laboratory of Spectral Analysis and Functional ProbesCollege of BiophotonicsSouth China Normal UniversityGuangzhou 510631GuangdongChina school of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081China Songshan Lake Materials Laboratory Dongguan 523429GuangdongChina Department of Materials Science and Engineering Guangdong Provincial Key Laboratory of Functional Oxide Materials and DevicesSouthern University of Science and TechnologyShenzhen 518055GuangdongChina Beijing Advanced Innovation Center for Soft Matter Science and Engineering College of Chemical EngineeringCollege of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029China Department of Physics Liaoning UniversityShenyang 110036LiaoningChina Beijing National Laboratory for Molecular Sciences(BNLMS) Institute of ChemistryChinese Academy of SciencesBeijing 100190China School of Physics and Materials Science Guangzhou UniversityGuangzhou 510006GuangdongChina Shenzhen Institute of Advanced Technology Chinese Academy of SciencesShenzhen 18055GuangdongChina

Near-infrared(NIR)transparent inverted all-inorganic perovskite solar cells(PSCs)are excellent top cell candidates in tandem *** essential challenge is the replacement of metal contacts with transparent conductive oxide(TCO)electrodes,which requires the introduction of a buffer layer to prevent sputtering *** this study,we show that the conventional buffers(i.e.,small organic molecules and atomic layer deposited metal oxides)used for organic-inorganic hybrid perovskites are not applicable to all-inorganic perovskites,due to non-uniform coverage of the vulnerable layers underneath,deterioration upon ion bombardment and moisture induced perovskite phase transition,A thin film of metal oxide nanoparticles by the spin-coating method serves as a non-destructive buffer layer for inorganic ***-inorganic inverted near-infrared-transparent PSCs deliver a PCE of 17.46%and an average transmittance of 73.7%between 780 and 1200 *** combination with an 18.56%Cu(In,Ga)Se_(2) bottom cell,we further demonstrate the first all-inorganic perovskite/CIGS 4-T tandem solar cell with a PCE of 24.75%,which exhibits excellent illumination stability by maintaining 86.7%of its initial efficiency after 1400 *** non-destructive buffer lays the foundation for efficient and stable NIR-transparent inverted inorganic perovskite solar cells and perovskite-based tandems.

关键词： CsPbI_(3)perovskite Inverted perovskite solar cells Tandem solar cells Buffer layer Stability

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In-plane ferroelectric tunnel junctions based on 2D α-In_(2)Se_(3)/ semiconductor heterostructures

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npj Computational materials 2023年第1期9卷 2286-2292页

作者： Zifang Liu Pengfei Hou Lizhong Sun Evgeny Y.Tsymbal Jie Jiang Qiong Yang Hunan Provincial Key Laboratory of Thin Film Materials and Devices School of Materials Science and EngineeringXiangtan UniversityXiangtan 411105 HunanChina Department of Physics and Astronomy University of NebraskaLincolnNE 68588USA

Ferroelectric tunnel junctions(FTJs)have great potential for application in high-density non-volatile ***,α-In_(2)Se_(3) was found to exhibit robust in-plane and out-of-plane ferroelectric polarizations at a monolayer thickness,which is ideal to serve as a ferroelectric component in miniaturized electronic *** this work,we design two-dimensional van der Waals heterostructures composed of anα-In_(2)Se_(3) ferroelectric and a hexagonal IV–VI semiconductor and propose an in-plane FTJ based on these *** first-principles calculations show that the electronic band structure of the designed heterostructures can be switched between insulating and metallic states by ferroelectric *** demonstrate that the in-plane FTJ exhibits two distinct transport regimes,tunneling and metallic,for OFF and ON states,respectively,leading to a giant tunneling electroresistance effect with the OFF/ON resistance ratio exceeding 1×*** results provide a promising approach for the high-density ferroelectric memory based on the 2D ferroelectric/semiconductor heterostructures.

关键词： ferroelectric plane tunneling

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Surface phase diagram of CsSnI3 from first-principles calculations

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Physical Review materials 2024年第9期8卷 093401页

作者： Kejia Li Chadawan Khamdang Mengen Wang Department of Electrical and Computer Engineering Materials Science and Engineering Program

CsSnI3 is widely studied as an environmentally friendly Pb-free perovskite material for optoelectronic device applications. To further improve material and device performance, it is important to understand the surface structures of CsSnI3. We generate surface structures with various stoichiometries, perform density functional theory calculations to create phase diagrams of the CsSnI3 (001), (110), and (100) surfaces, and determine the most stable surfaces under a wide range of Cs, Sn, and I chemical potentials. Under I-rich conditions, surfaces with Cs vacancies are stable, which lead to partially occupied surface states above the valence band maximum. Under I-poor conditions, we find the stoichiometric (100) surface to be stable under a wide region of the phase diagram, which does not have any surface states and can contribute to long charge-carrier lifetimes. Consequently, the I-poor (Sn-rich) conditions will be more beneficial to improve the device performance.

关键词： Electronic structure Surface reconstruction Surface states Perovskites Semiconductors Density functional theory

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Review of the role of ionic liquids in two-dimensional materials

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Frontiers of physics 2023年第4期18卷 177-197页

作者： Na Sa Meng Wu Hui-Qiong Wang Engineering Research Center of Micro-nano Optoelectronic Materials and Devices Ministry of EducationFujian Key Laboratory of Semiconductor Materials and ApplicationsCI Center for OSEDand Department of PhysicsXiamen UniversityXiamen 361005China Department of Physics and Department of New Energy Science and EngineeringXiamen University MalaysiaSepang 43900Malaysia

Ionic liquids(ILs)are expected to be used as readily available“designer”solvents,characterized by a number of tunable properties that can be obtained by modulating anion and cation combinations and ion chain *** them,its high ionicity is outstanding in the preparation and property modulation of two-dimensional(2D)*** this review,we mainly focus on the ILs-assisted exfoliation of 2D materials towards large-scale as well as ***,electric-field controlled ILs-gating of 2D material systems have shown novel electronic,magnetic,optical and superconducting properties,attracting a broad range of scientific research ***,ILs have also been extensively applied in various field *** summarize the recent developments of ILs modified 2D material systems from the electrochemical,solar cells and photocatalysis aspects,discuss their advantages and possibilities as“designer solvent”.It is believed that the design of ILs accompanying with diverse 2D materials will not only solve several scientific problems but also enrich materials design and engineer of 2D materials.

关键词： ionic liquids two-dimensional materials liquid phase exfoliation ionic liquid-gating electrochemical capacitors solar cells photocatalysis

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Elastic microphase separation produces robust bicontinuous materials

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Nature materials 2024年第1期23卷 124-130页

作者： Fernández-Rico, Carla Schreiber, Sanjay Oudich, Hamza Lorenz, Charlotta Sicher, Alba Sai, Tianqi Bauernfeind, Viola Heyden, Stefanie Carrara, Pietro Lorenzis, Laura De Style, Robert W. Dufresne, Eric R. Department of Materials ETH Zürich Zürich Switzerland Department of Mechanical and Process Engineering ETH Zürich Zürich Switzerland Adolphe Merkle Institute University of Fribourg Fribourg Switzerland Department of Materials Science and Engineering Department of Physics Cornell University IthacaNY United States

Bicontinuous microstructures are essential to the function of diverse natural and synthetic systems. Their synthesis has been based on two approaches: arrested phase separation or self-assembly of block copolymers. The former is attractive for its chemical simplicity and the latter, for its thermodynamic robustness. Here we introduce elastic microphase separation (EMPS) as an alternative approach to make bicontinuous microstructures. Conceptually, EMPS balances the molecular-scale forces that drive demixing with large-scale elasticity to encode a thermodynamic length scale. This process features a continuous phase transition, reversible without hysteresis. Practically, EMPS is triggered by simply supersaturating an elastomeric matrix with a liquid, resulting in uniform bicontinuous materials with a well-defined microscopic length scale tuned by the matrix stiffness. The versatility of EMPS is further demonstrated by fabricating bicontinuous materials with superior mechanical properties and controlled anisotropy and microstructural gradients. Overall, EMPS presents a robust alternative for the bulk fabrication of homogeneous bicontinuous materials. © 2023, The Author(s), under exclusive licence to Springer Nature Limited.

关键词： Microphase separation

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Air-stable n-type transistors based on assembled aligned carbon nanotube arrays and their application in complementary metal-oxide-semiconductor electronics

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Nano Research 2022年第2期15卷 864-871页

作者： Zhen Li Katherine R.Jinkins Dingzhou Cui Mingrui Chen Zhiyuan Zhao Michael S.Arnold Chongwu Zhou Ming Hsieh Department of Electrical Engineering Mork Family Department of Chemical Engineering and Materials Scienceand Department of Physics and AstronomyUniversity of Southern CaliforniaLos AngelesCalifornia 90089USA Department of Materials Science and Engineering University of Wisconsin-MadisonMadisonWisconsin 53706USA

Carbon nanotubes(CNTs)are ideal candidates for beyond-silicon nano-electronics because of their high mobility and low-cost ***,assembled massively aligned CNTs have emerged as an important platform for semiconductor ***,realizing sophisticated complementary nano-electronics has been challenging due to the p-type nature of carbon nanotubes in *** of n-type behavior field effect transistors(FETs)based on assembled aligned CNT arrays is needed for advanced CNT *** in this paper,we report a scalable process to make n-type behavior FETs based on assembled aligned CNT ***-stable and high-performance n-type behavior CNT FETs are achieved with high yield by combining the atomic layer deposition dielectric and metal contact *** also systematically studied the contribution of metal contacts and atomic layer deposition passivation in determining the transistor *** on these experimental results,we report the successful demonstration of complementary metal-oxide-semiconductor inverters with good performance,which paves the way for realizing the promising future of carbon nanotube nano-electronics.

关键词： carbon nanotube field effect transistor air-stable complementary metal-oxide-semiconductor

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Magnetic triangular bubble lattices in bismuth-doped yttrium iron garnet

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Chinese physics B 2023年第2期32卷 34-39页

作者：蔺涛王承祥邱志勇陈超邢弢孙璐梁建辉吴义政时钟雷娜 Fert Beijing Institute MIIT Key Laboratory of SpintronicsSchool of Integrated Circuit Science and EngineeringBeihang UniversityBeijing 100191China Key Laboratory of Materials Modification by Laser Ionand Electron Beams(Ministry of Education)School of Materials Science and EngineeringDalian University of TechnologyDalian 116024China Key Laboratory of Energy Materials and Devices(Liaoning Province) School of Materials Science and EngineeringDalian University of TechnologyDalian 116024China Department of Physics and State Key Laboratory of Surface Physics Fudan UniversityShanghai 200433China School of Information Science and Technology Shanghai Technology UniversityShanghai 201210China Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology&Pohl Institute of Solid State Physics School of Physics Science and EngineeringTongji UniversityShanghai 200092China

Magnetic bubbles have again become a subject of significant attention following the experimental observation of topologically nontrivial magnetic skyrmions. In recent work, tailoring the shape of the bubbles is considered a key factor for their dynamics in spintronic devices. In addition to the reported circular, elliptical, and square bubbles, here we observe triangular bubble domains in bismuth-doped yttrium iron garnet(Bi-YIG) using Kerr microscopy. The bubble domains evolve from discrete circular to latticed triangular and hexagonal shapes. Further, the orientation of the triangular bubbles in the hexagonal lattices can be flipped by decreasing the magnetic field. The sixfold in-plane magnetic anisotropy of Bi-YIG(111) crystal, which is presumably the mechanism underlying the triangular shape of the bubbles, is measured as1179 erg/cm~3. The study of the morphologies of topologically trivial bubbles in YIG offers insight into nontrivial spin textures, which is appealing for future spintronic applications.

关键词： magnetic bubble yttrium iron garnet Kerr microscopy spintronics

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Cold sintering process with DMSO as a transient liquid for efficient improvement of thermoelectric properties in silver selenide

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materials science for Energy Technologies 2025年 8卷 154-165页

作者： Duangsimma, Wanida Banlusan, Kiettipong Pinitsoontorn, Supree Materials Science and Nanotechnology Program Department of Physics Faculty of Science Khon Kaen University Khon Kaen40002 Thailand Khon Kaen University Khon Kaen40002 Thailand

This study investigates the enhancement of thermoelectric properties in silver selenide (Ag2Se) via the cold sintering process (CSP) using dimethyl sulfoxide (DMSO) as a transient liquid phase. Unlike conventional sintering methods that require high temperatures and long processing times, CSP with DMSO enables densification at significantly lower temperatures while simultaneously tuning the microstructure and carrier transport properties. Bulk Ag2Se samples were fabricated with varying DMSO concentrations (5–12 %) and sintering temperatures (190 °C, 220 °C, and 250 °C) to evaluate the influence of these parameters on thermoelectric performance. X-ray diffraction (XRD) analysis confirmed the retention of the orthorhombic β-Ag2Se phase across all samples, with slight morphological changes observed due to DMSO concentration and sintering temperature. Optimal results were achieved at a DMSO concentration of 10 %, where a balance between electrical conductivity (σ) and Seebeck coefficient (S) yielded a high power factor. Thermal conductivity (κ) analysis showed a significant reduction attributed to enhanced phonon scattering from defects introduced via CSP with DMSO. Furthermore, the AS-DMSO250 sample (with 10 % DMSO and sintered at 250 °C) exhibited a stable ZT, ranging from 0.94 at 300 K to 1.10 at 380 K representing a 42–49 % enhancement over the reference sample, which had ZT values of 0.66 at 300 K and 0.74 at 380 K. The average ZT of the optimized sample with DMSO reached approximately 1.02 at 300–380 K, surpassing values commonly reported in the literature. These findings emphasize the critical role of DMSO concentration and sintering temperature in optimizing thermoelectric properties, offering a practical approach for advancing Ag2Se-based thermoelectric materials for efficient energy harvesting near room temperature. © 2025 The Authors

关键词： Liquid phase sintering

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Killing two birds with one stone:Enhancing the photoelectrochemical water splitting activity and stability of BiVO_(4)by Fe ions association

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Chinese Chemical Letters 2024年第12期35卷 154-159页

作者： Hailang Deng Abebe Reda Woldu Abdul Qayum Zanling Huang Weiwei Zhu Xiang Peng Paul K.Chu Liangsheng Hu Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province Shantou UniversityShantou515063China Department of Mechanical Engineering Shantou UniversityGuangdong 515063China Hubei Key Laboratory of Plasma Chemistry and Advanced Materials School of Materials Science and EngineeringWuhan Institute of TechnologyWuhan 430205China Chemistry and Chemical Engineering Guangdong Laboratory Shantou 515063China Department of Physics Department of Materials Science and Engineeringand Department of Biomedical EngineeringCity University of Hong KongHong KongChina Shantou Huaxing Metallurgical Equipment Co. Ltd.Shantou 515063China

Bi VO_(4)is a promising semiconducting photoanode for photoelectrochemical(PEC)water splitting due to its suitable ***,the dissolution of V^(5+)and sluggish reaction kinetics at the surface in the oxygen evolution reaction(OER)limit its ***,we report a convenient strategy to change the microenvironment by adding Fe(Ⅲ)into the *** the PEC process,Fe(Ⅲ)ions not only improve the current density,but also show excellent stability toward Bi VO_(4).Consequently,the current increases by more than 1.7 times compared to that without Fe(Ⅲ).Photoelectrochemical,morphological,and structural characterizations reveal that the FeOOH co-catalyst produced in situ on the Bi VO_(4)photoanode by cyclical formation of the intermediates at the electrode/electrolyte interface during OER accelerates the OER kinetics and prevents photo-corrosion by suppressing the dissolution of V^(5+).The results reveal a new strategy for the multifunctional modification of photoanodes for efficient solar conversion.

关键词： Photoelectrochemical water splitting Bi VO_(4)photoanodes Fe(Ⅲ)ions Oxygen evolution reaction Dynamic changes

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Understanding the Mechanism for the In-Plane Yielding Anisotropy of a Hot-Rolled Zirconium Plate

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Acta Metallurgica Sinica(English Letters) 2024年第6期37卷 1066-1076页

作者： Guodong Song Conghui Zhang Yunchang Xin Nobuhiro Tsuji Xinde Huang Bo Guan Xiaomei He School of Metallurgical Engineering Xi’an University of Architecture and TechnologyXi’an710055China Key Laboratory for Light-Weight Materials Nanjing Tech UniversityNanjing210009China Department of Materials Science and Engineering Kyoto UniversityYoshida-honmachiSakyo-kuKyoto606-8501Japan Institute of Applied Physics Jiangxi Academy of ScienceNanchang330029China

Previously,the in-plane mechanical anisotropy of Zr hot-rolled plates is ascribed mainly to the different activities of the deformation modes activated when loading along different *** this work,a quantitative study on the deformation behavior of a pure Zr hot-rolled plate under tension along the rolling direction(RD)and transverse direction(TD)reveals that both the activities of deformation modes and the anisotropy of grain boundary strengthening account for a tensile yield strength anisotropy along the TD and *** plasticity simulations using viso-plastic self-consistent model show that prismatic slip is the predominant deformation mode for tension along the RD(RD-tension),while prismatic slip and basal slip are co-dominant deformation modes under tension along the TD(TD-tension).A low fraction of■under TD-tension,while hardly activated under *** activation of basal slip with a much higher critical resolve shear stress under TD-tension contributes to a higher yield strength along the TD than along the *** grain boundary strengthening effect under tension along the TD and RD were compared by calculating the activation stress difference(△Stress)and the geometric compatibility factor(m′)between neighboring *** results indicate a higher grain boundary strengthening for TD-tension than that for RD-tension,which will lead to a higher yield strength along the *** is,the anisotropy of grain boundary strengthening between TD-tension and RD-tension also plays an important role in the in-plane anisotropy along the RD and ***,the reasons for why there is a grain-boundary-strengthening anisotropy along the TD and RD were discussed.

关键词： Zirconium Strengthening Grain boundary Orientation

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