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Effects of P-Type Dopant on Photovoltaic Performance of Pervoskite Solar Cells Using Phthalocyanine-Tetrabenzoporphyrin Hole Transport materials: A Combined Theoretical and Experimental Study

SSRN

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SSRN 2023年

作者： Dao, Quang-Duy Le, Thi-Huong Tran, Ngoc-Anh Fujii, Akihiko Ozaki, Masanori Department of Advanced Materials Science and Nanotechnology University of Science and Technology of Hanoi Vietnam Academy of Science and Technology Caugiay Hanoi11355 Viet Nam Faculty of Physics University of Science Vietnam National University Hanoi Thanhxuan Hanoi11400 Viet Nam Division of Electrical Electronic and Informational Engineering Osaka University Suita Osaka5650871 Japan

We demonstrate effects of p-type dopant on photovoltaic performance of pervoskite solar cells (PSCs) using phthalocyanine (C6PcH2)-tetrabenzoporphyrin (C6TBPH2) hole transport materials (HTMs) by combining theoretical and experimental studies. Although, C6PcH2 and C6TBPH2 molecules share a similar chemical structure, there is only the p-type dopant induced oxidization observed experimentally in C6TBPH2 molecules through emerging an optical absorption at 2.9 eV and shifting energy band diagram. As a result, by adding p-type dopants, power conversion efficiencies (PCEs) of PSCs utilizing C6TBPH2 HTM are improved from around 4 to 14%, but those of PSCs utilizing C6PcH2 HTM are remained at around 4%. Numerical simulations indicate that the improvement of PCEs (from 5.7 to 21.1%) of the simulated cells utilizing the C6TBPH2 HTMs with p-type dopants are attributed to increases in the HTM acceptor densities and deepening the HTM highest occupied molecular orbital energy levels rather than increases in the HTM hole mobility. We suggest that those results could be an indicator for fabrication of efficient PSCs utilizing organic HTMs with p-type dopants. © 2023, The Authors. All rights reserved.

关键词： Perovskite solar cells

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Nanodevices engineering and spin transport properties of MnBi_(2)Te_(4) monolayer

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npj Computational materials 2021年第1期7卷 414-421页

作者： Yipeng An Kun Wang Shijing Gong Yusheng Hou Chunlan Ma Mingfu Zhu Chuanxi Zhao Tianxing Wang Shuhong Ma Heyan Wang Ruqian Wu Wuming Liu School of Physics&Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials Henan Normal UniversityXinxiangChina Department of Physics and Astronomy Mississippi State UniversityStarkvilleMSUSA Department of Chemistry Mississippi State UniversityStarkvilleMSUSA Key Laboratory of Polar Materials and Devices(MOE)&Department of Optoelectronics East China Normal UniversityShanghaiChina Department of Physics and Astronomy University of CaliforniaIrvineCAUSA School of Physics Sun Yat-Sen UniversityGuangzhouChina School of Physics and Technology Suzhou University of Science and TechnologySuzhouJiangsuChina Hebi National Lighting Co.Ltd HebiChina Siyuan Laboratory Guangdong Provincial Engineering Technology Research Center of Vacuum Coating Technologies and New Energy MaterialsDepartment of PhysicsJinan UniversityGuangzhouChina Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijingChina

Two-dimensional(2D)magnetic materials are essential for the development of the next-generation spintronic ***,layered van der Waals(vdW)compound MnBi2Te4(MBT)has attracted great interest,and its 2D structure has been reported to host coexisting magnetism and ***,we design several conceptual nanodevices based on MBT monolayer(MBT-ML)and reveal their spin-dependent transport properties by means of the first-principles *** pn-junction diodes and sub-3-nm pin-junction field-effect transistors(FETs)show a strong rectifying effect and a spin filtering effect,with an ideality factor n close to 1 even at a reasonably high *** addition,the pip-and nin-junction FETs give an interesting negative differential resistive(NDR)*** gate voltages can tune currents through these FETs in a large ***,the MBT-ML has a strong response to *** results uncover the multifunctional nature of MBT-ML,pave the road for its applications in diverse next-generation semiconductor spin electric devices.

关键词： temperature ideality transport

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Gauge Field Induced Chiral Zero Mode in Five-Dimensional Yang Monopole Metamaterials

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Physical Review Letters 2023年第24期130卷 243801-243801页

作者： Shaojie Ma Hongwei Jia Yangang Bi Shangqiang Ning Fuxin Guan Hongchao Liu Chenjie Wang Shuang Zhang New Cornerstone Science Laboratory Department of Physics The University of Hong Kong Hong Kong 999077 China Shanghai Engineering Research Centre of Ultra Precision Optical Manufacturing Department of Optical Science and Engineering School of Information Science and Technology Fudan University Shanghai 200433 China Department of Physics and Institute for Advanced Study The Hong Kong University of Science and Technology Hong Kong 999077 China State Key Laboratory of Integrated Optoelectronics College of Electronic Science and Engineering Jilin University 2699 Qianjin Street Changchun 130012 China Institute of Applied Physics and Materials Engineering University of Macau Avenida da Universidade Taipa Macao SAR 999078 China Department of Electrical and Electronic Engineering The University of Hong Kong Hong Kong 999077 China

Owing to the chirality of Weyl nodes characterized by the first Chern number, a Weyl system supports one-way chiral zero modes under a magnetic field, which underlies the celebrated chiral anomaly. As a generalization of Weyl nodes from three-dimensional to five-dimensional physical systems, Yang monopoles are topological singularities carrying nonzero second-order Chern numbers c2=±1. Here, we couple a Yang monopole with an external gauge field using an inhomogeneous Yang monopole metamaterial and experimentally demonstrate the existence of a gapless chiral zero mode, where the judiciously designed metallic helical structures and the corresponding effective antisymmetric bianisotropic terms provide the means for controlling gauge fields in a synthetic five-dimensional space. This zeroth mode is found to originate from the coupling between the second Chern singularity and a generalized 4-form gauge field—the wedge product of the magnetic field with itself. This generalization reveals intrinsic connections between physical systems of different dimensions, while a higher-dimensional system exhibits much richer supersymmetric structures in Landau level degeneracy due to the internal degrees of freedom. Our study offers the possibility of controlling electromagnetic waves by leveraging the concept of higher-order and higher-dimensional topological phenomena.

关键词： Photonics Synthetic gauge fields Topological materials

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Three-dimensional MXenes heterostructures and their applications

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science China materials 2022年第11期65卷 2895-2910页

作者： Jizhou Jiang Fangyi Li Jing Zou Song Liu Jiamei Wang Yilun Zou Kun Xiang Han Zhang Guoyin Zhu Yizhou Zhang Xianzhu Fu Jyh-Ping Hsu School of Environmental Ecology and Biological Engineering School of Chemistry and Environmental EngineeringKey Laboratory of Green Chemical Engineering Process of Ministry of EducationEngineering Research Center of Phosphorus Resources Development and Utilization of Ministry of EducationWuhan Institute of TechnologyWuhan 430205 Key Laboratory of Rare Mineral Ministry of Natural ResourcesGeological Experimental Testing Center of Hubei ProvinceWuhan 430034 Institute of Chemical Biology and Nanomedicine(ICBN) State Key Laboratory of Chemo/Biosensing and ChemometricsCollege of Chemistry and Chemical EngineeringHunan UniversityChangsha 410082 College of Materials Science and Engineering Shenzhen Engineering Laboratory of Phosphorene and Optoelectronics and Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceShenzhen UniversityShenzhen 518060 Institute of Advanced Materials and Flexible Electronics(IAMFE) School of Chemistry and Materials ScienceNanjing University of Information Science&TechnologyNanjing 210044 Department of Chemical Engineering “National”Taiwan UniversityTaipei 10617

Due to their unique surface chemistry,highly adjustable metal components,hydrophilicity,and high carrier concentrations,MXenes are applied in a variety of *** to other two-dimensional(2D)materials,building heterostructures with additional materials to form a 3D porous architecture for MXenes can significantly enhance their functionality and ***,the open structures and well-defined pathways of these 3D structured MXenes can improve ionic and electronic transport,thereby promoting their applications in electrochemical energy storage,sensing,catalysis,and *** this review,the recent efforts made on preparing 3D porous MXenes with heterostructures,focusing on MXenes/C,MXenes/inorganics,and MXenes/polymers were *** discussion covers aspects ranging from the design to synthesis of 3D porous MXenes,and their applications in photocatalysis,environmental monitoring and electrochemical energy *** review is concluded by presenting the prospects and insights on exploring the relationships between the porosity formation mechanisms,properties and applications of the 3D porous MXenes *** review can provide meaningful guidance for the design,fabrication and application of 3D porous MXenes in high-performance materials and devices.

关键词： 3D porous MXenes MXenes heterostructures photocatalysis environmental monitoring electrochemical energy storage

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Zwitterion-Bearing Silica Sol for Enhancing Antifouling Performance and Mechanical Strength of Transparent Pdms Coatings

SSRN

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SSRN 2024年

作者： Tan, Jinyan Esteves, A. Catarina C. Yang, Jinlong Zhou, Shuxue Department of Materials Science State Key Laboratory of Molecular Engineering of Polymers Advanced Coatings Research Center Ministry of Education of China Fudan University Shanghai200438 China Laboratory of Physical Chemistry Department of Chemical Engineering and Chemistry Eindhoven University of Technology Eindhoven5600 MB Netherlands Eindhoven University of Technology Eindhoven5600 MB Netherlands International Research Center for Marine Biosciences Ministry of Science and Technology Shanghai Ocean University Shanghai201306 China

The simultaneous improvement of mechanical strength and inhibition of slime attachment for polydimethylsiloxane(PDMS)-based fouling-release coatings remains as a great challenge. In this work, a zwitterionic precursor (N-methoxyacylethyl)-3-aminopropyltriethoxysilane (MAPS) was co-hydrolyzed with tetraethoxysilane (TEOS) to afford zwitterion-bearing silica sols (h-MAPS). The h-MAPS was then simply blended with hydroxyl-terminated PDMS (PDMS-OH, 3060 cSt and 20000 cSt) to fabricate zwitterion-containing PDMS coatings. The pre-hydrolysis process, including hydrolysis time and TEOS content, is critical to the transparency of the coatings. High optical transparency in the range of 88.1-91.4% at 550 nm could be reached using appropriate h-MAPS. Both PDMS-OH (3060 cSt)- and PDMS-OH (20000 cSt)-based coatings presented excellent resistance to slime attachment in real marine environment at relatively high h-MAPS content. An improvement in anti-protein adsorption and anti-bacteria properties was achieved for the coatings based on PDMS-OH (3060 cSt) attributed to the presence of more zwitterions at its surface. Addition of h-MAPS could increase the elastic modulus and tensile strength of PDMS coatings, particularly with high efficiency for the later one. More importantly, although the tensile strength of zwitterion-containing PDMS coatings at high h-MPAS content could be up to 15 MPa, its pseudobarnacle removal strength was lower than 0.4 MPa even after seawater immersion, indicating it retained a good fouling-release performance. As a whole, zwitterion-bearing silica sols can not only provide a new approach for introduction of zwitterions into PDMS coatings, but also efficiently solve the multiple drawbacks of PDMS-based fouling-release coatings, simultaneously. © 2024, The Authors. All rights reserved.

关键词： Coatings

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Correcting force error-induced underestimation of lattice thermal conductivity in machine learning molecular dynamics

arXiv

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arXiv 2024年

作者： Wu, Xiguang Zhou, Wenjiang Dong, Haikuan Ying, Penghua Wang, Yanzhou Song, Bai Fan, Zheyong Xiong, Shiyun Guangzhou Key Laboratory of Low-Dimensional Materials and Energy Storage Devices School of Materials and Energy Guangdong University of Technology Guangzhou510006 China Department of Energy and Resources Engineering Peking University Beijing100871 China School of Advanced Engineering Great Bay University Dongguan523000 China College of Physical Science and Technology Bohai University Jinzhou121013 China Department of Physical Chemistry School of Chemistry Tel Aviv University Tel Aviv6997801 Israel MSP group QTF Centre of Excellence Department of Applied Physics Aalto University Aalto EspooFI-00076 Finland Department of Advanced Manufacturing and Robotics Peking University Beijing100871 China National Key Laboratory of Advanced MicroNanoManufacture Technology Beijing100871 China

Machine learned potentials (MLPs) have been widely employed in molecular dynamics (MD) simulations to study thermal transport. However, literature results indicate that MLPs generally underestimate the lattice thermal conductivity (LTC) of typical solids. Here, we quantitatively analyze this underestimation in the context of the neuroevolution potential (NEP), which is a representative MLP that balances efficiency and accuracy. Taking crystalline silicon, GaAs, graphene, and PbTe as examples, we reveal that the fitting errors in the machine-learned forces against the reference ones are responsible for the underestimated LTC as they constitute external perturbations to the interatomic forces. Since the force errors of a NEP model and the random forces in the Langevin thermostat both follow a Gaussian distribution, we propose an approach to correcting the LTC by intentionally introducing different levels of force noises via the Langevin thermostat and then extrapolating to the limit of zero force error. Excellent agreement with experiments is obtained by using this correction for all the prototypical materials over a wide range of temperatures. Based on spectral analyses, we find that the LTC underestimation mainly arises from increased phonon scatterings in the low-frequency region caused by the random force errors. © 2024, CC BY.

关键词： Molecular dynamics

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Electronic states in superconducting type-II Dirac semimetal: 1T-PdSeTe

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Physical Review Research 2025年第1期7卷 013174-013174页

作者： Yogendra Kumar Shiv Kumar Venkateswara Yenugonda Ryohei Oishi Jayita Nayak Chaoyu Chen Ravi Prakash Singh Takahiro Onimaru Yasuyuki Shimura Graduate School of Advanced Science and Engineering Hiroshima University Higashi-Hiroshima 739-8526 Japan Research Institute for Synchrotron Radiation Science (HiSOR) Hiroshima University Higashi-Hiroshima 739-0046 Japan Department of Physics SUNY Buffalo State University Buffalo New York 14222 USA Department of Physics Indian Institute of Technology Kanpur 208016 India Songshan Lake Materials Laboratory Dongguan 523808 China Department of Physics Indian Institute of Science Education and Research Bhopal 462066 India

We have investigated the surface and bulk electronic structures of the superconducting type-II Dirac semimetal 1T-PdSeTe. The superconducting transition temperature Tc=3.2 K was almost twice as high as Tc=1.6 K in 1T-PdTe2. Scanning transmission electron microscopy measurements showed homogeneously mixed Se and Te atoms in the chalcogen layers, consistent with the CdI2-type crystal structure. Angle-resolved photoemission spectroscopy measurements and density functional theory calculations indicated the existence of the topological surface states, and the overall band structures were similar to those of 1T-PdTe2. These results suggest that the CdI2-type lattice symmetry dictates the band dispersion, regardless of atomic disorder in the chalcogen layers. As the electronic band dispersion and the local structures were persistent upon substitution, the enhancement of Tc is likely associated with the chemical pressure. Our results provide insight into the effects of the solid solution on the surface and bulk electronic states as well as the superconducting transition temperature.

关键词： Photoelectron spectroscopy

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Improvement in inkjet printed green qled efficiency 58th

Improvement in inkjet printed green qled efficiency

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58th International Symposium on Digest of Technical Papers, ICDT 2021

作者： Jia, Siqi Ma, Jingrui Liu, Pai Wu, Zhenghui Xu, Bing Tang, Jing Li, Guangyu Wang, Kai Sun, Xiao Wei Ministry of Education and Department of Electrical and Electronic Engineering Southern University of Science and Technology Shenzhen518055 China Key Laboratory of Automobile Materials Ministry of Education and Department of Materials Science and Engineering Jilin University Renmin Street No. 5988 Changchun130025 China Guangdong University Key Laboratory for Advanced Quantum Dot Displays and Lighting GuangdongHong Kong-Macao Joint Laboratory for Photonic-Thermal-Electrical Energy Materials and Devices Southern University of Science and Technology Shenzhen518055 China Shenzhen Planck Innovation Technologies Co. Ltd Shenzhen China

There is no doubt that TFB as HTL layer in QLED show predominance in presuming long lifetime devices, however, it is negatively affected by QD solvent in ink jet printing. Herein a thin layer of Tris(4-carbazoyl-9-ylphenyl) amine (TCTA) was deposited between the QD and HTL to prevent QD solvent permeating into the TFB layer. The TCTA successfully improve the hole injection by provide a deeper highest occupied molecular orbital (HOMO) level, the external quantum efficiency has been significantly increased from 5.1 % to 7.2 %. © 2021 SID.

关键词： Efficiency

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Magnetic dynamics of two-dimensional itinerant ferromagnet Fe_(3)GeTe_(2)

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Chinese Physics B 2021年第9期30卷 506-512页

作者： Lijun Ni Zhendong Chen Wei Li Xianyang Lu Yu Yan Longlong Zhang Chunjie Yan Yang Chen Yaoyu Gu Yao Li Rong Zhang Ya Zhai Ronghua Liu Yi Yang Yongbing Xu Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials School of Electronic Science and EngineeringNanjing UniversityNanjing 210093China Jiangsu Provincial Key Laboratory for Nanotechnology School of PhysicsNanjing UniversityNanjing 210093China Department of Physics Southeast UniversityNanjing 211189China York-Nanjing Joint Centre for Spintronics and NanoEngineering Department of Electronic EngineeringUniversity of YorkYork YO105DDUnited Kingdom Jiangsu Key Laboratory of Opto-Electronic Technology Center for Quantum Transport and Thermal Energy ScienceSchool of Physics and TechnologyNanjing Normal UniversityNanjing 210023China

Among the layered two-dimensional ferromagnetic materials(2D FMs),due to a relatively high T_(C),the van der Waals(vdW)Fe_(3)GeTe_(2)(FGT)crystal is of great importance for investigating its distinct magnetic ***,we have carried out static and dynamic magnetization measurements of the FGT crystal with a Curie temperature TC≈204 *** M-H hysteresis loops with in-plane and out-of-plane orientations show that FGT has a strong perpendicular magnetic anisotropy with the easy axis along its ***,we have calculated the uniaxial magnetic anisotropy constant(K_(1))from the SQUID *** dynamic magnetic properties of FGT have been probed by utilizing the high sensitivity electron-spin-resonance(ESR)spectrometer at cryogenic *** on an approximation of single magnetic domain mode,the K_(1)and the effective damping constant(αeff)have also been determined from the out-of-plane angular dependence of ferromagnetic resonance(FMR)spectra obtained at the temperature range of 185 K to T_(C).We have found large magnetic damping with the effective damping constantαeff~0.58 along with a broad linewidth(ΔH_(pp)>1000 Oe at 9.48 GHz,H||c-axis).Our results provide useful dynamics information for the development of FGT-based spintronic devices.

关键词： two-dimensional ferromagnet ferromagnetic resonance magnetic anisotropy magnetic damping

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A high-density stretchable electrode array for stable sEMG monitoring on dorsal hand

A high-density stretchable electrode array for stable sEMG m...

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2023 IEEE International Conference on Real-Time Computing and Robotics, RCAR 2023

作者： Yang, Ruofan Luo, Dong Sun, Jing Zhao, Hang Li, Qingsong Tian, Qiong Tong, Wei Qi, Dianpeng Li, Guanglin Liu, Zhiyuan University of Chinese Academy of Sciences School of Artificial Intelligence China Guangdong-Hong Kong-Macao Joint Laboratory of Human-Machine Intelligence-Synergy Systems Shenzhen518055 China The Chinese University of Hong Kong Hong Kong Hong Kong Chinese Academy of Sciences Center for Opto-Electronics Engineering & Technology Shenzhen Institutes of Advanced Technology China Chinese Academy of Sciences Cas Key Laboratory of Human-Machine Intelligence-Synergy Systems Shenzhen Institutes of Advanced Technology Shenzhen518055 China University of Science and Technology of China Department of Nano Science and Technology Institute Suzhou China Harbin Institute of Technology Miit Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical Engineering Harbin150001 China Harbin Institute of Technology Natl. and Loc. Jt. Eng. Lab. for Synthesis Transformation and Separation of Extreme Environ. Nutrients Harbin150001 China

ISBN: (纸本)9798350327182

Hand electromyogram (EMG) signals, instrumental in tasks like movement recognition, rehabilitation monitoring, disease diagnosis, and human-computer collaboration, are typically obtained via high-density EMG electrodes on the dorsal hand. Conventional polyimide (PI)-based flexible high-density electrodes, despite their popularity, suffer from high modulus and poor stretchability. These factors lead to conformability issues, particularly on complex human body surfaces such as the dorsal hand skin, causing motion artifacts, signal degradation, and in severe cases, signal loss due to electrode *** paper presents a thermoplastic polyurethane (TPU)-based high-density stretchable sEMG electrode for reliable EMG signal capture on complex surfaces. Performance comparisons between the proposed stretchable electrode (SE) and the traditional Pl-based flexible sEMG electrode (FE), focusing on time-domain waveforms and signal-to-noise ratio (SNR) under identical fixation conditions, indicate that SE maintains stable EMG signal acquisition across various hand postures. In contrast, the flexible electrode demonstrates signal weakness or loss under large deformations. Further, SNR analysis highlights SE's superior performance during high-intensity movements causing substantial skin deformation. Thus, the proposed SE emerges as a more convenient solution for stable and reliable hand EMG signal monitoring. © 2023 IEEE.

关键词： Electrodes

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