Article
Physics, Applied
Jiu-Xun Sun, Hong-Chun Yang, Yang Li, Hai-Juan Cui
Summary: Although the accurate solution of the drift-diffusion model has been a challenge in semiconductor physics, this study presents a new approach based on Fermi-Dirac statistics and a general mobility model. The results demonstrate noticeable differences between the accurate solution and other existing solutions, such as the Scharfetter-Gummel scheme and the Mott-Gurney equation.
PHYSICAL REVIEW APPLIED
(2023)
Article
Chemistry, Physical
Tingxia Zhou, Xiaomei Wu, Tianqi Deng, Haoyuan Li, Zhibin Gao, Wen Shi
Summary: Recently, two-dimensional covalent organic framework-based materials have shown promising performance for potential thermoelectric applications. However, the systematic atomistic design strategies for enhancing the thermoelectric properties of these materials remain a challenging task. In this study, using ab initio computations on 17 representative two-dimensional covalent organic frameworks, an atomistic understanding is established to uncover the complex correlation between macroscopic thermoelectric properties, nontrivial transport processes, and basic chemical structures, and general materials design guidelines are presented. The study reveals that the ratio of contributions from linker and knot parts to the valence bands can serve as a strong predictor of the thermoelectric performance of covalent organic frameworks.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Multidisciplinary
Marta Martinez-Abadia, Rajeev K. Dubey, Mercedes Fernandez, Miguel Martin-Arroyo, Robert Aguirresarobe, Akinori Saeki, Aurelio Mateo-Alonso
Summary: This study demonstrates that twisted molecular nanoribbons can self-assemble into ordered gels, and their morphologies and sol-gel transitions vary with the length of the nanoribbons. The nanoribbon gels also exhibit red fluorescence and pseudoconductivity values in the same range as current state-of-the-art gels.
Article
Physics, Applied
Marten Koopmansa, L. Jan Anton Kosterb
Summary: Doping has a significant impact on the Seebeck coefficient in organic semiconductors, with high carrier-carrier interactions reducing the Seebeck coefficient. Reducing these interactions can lead to an increased Seebeck coefficient and power factor, potentially increasing the ZT value above 1 for organic thermoelectrics.
APPLIED PHYSICS LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Manuel Kober-Czerny, Silvia Genaro Motti, Philippe Holzhey, Bernard Wenger, Jongchul Lim, Laura Maria Herz, Henry James Snaith
Summary: The charge carrier transport properties in layered perovskites, specifically 2D perovskite PEA(2)PbI(4), were investigated. The study found that layered perovskites have higher long-range and short-range mobilities, indicating that polycrystalline thin films have single-crystal-like qualities.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Physical
Robert J. Kirby, Gregory D. Scholes, Leslie M. Schoop
Summary: Square-net materials play a crucial role in optical spectroscopic explorations of electronic structure, photoinduced dynamics, and phase transitions in topological semimetals. Despite having similar structures, these materials exhibit remarkably different electronic and optical properties.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Yamei Liu, Heng Zhang, Hongde Yu, Zhongquan Liao, Silvia Paasch, Shunqi Xu, Ruyan Zhao, Eike Brunner, Mischa Bonn, Hai I. I. Wang, Thomas Heine, Mingchao Wang, Yiyong Mai, Xinliang Feng
Summary: Linear conjugated polymers have limitations in charge carrier transport due to interchain hopping, while two-dimensional (2D) conjugated polymers, such as 2D & pi-conjugated covalent organic frameworks (2D c-COFs), offer enhanced charge delocalization. In this study, we demonstrate the synthesis of thiophene-based 2D poly(arylene vinylene)s (PAVs) and compare their properties with linear PAVs and 2D c-COFs. The thiophene-based 2D PAVs exhibit enhanced planarity, charge delocalization, and unique band-like transport, making them promising candidates for high-performance opto-electronics.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Shiming Lei, Samuel M. L. Teicher, Andreas Topp, Kehan Cai, Jingjing Lin, Guangming Cheng, Tyger H. Salters, Fanny Rodolakis, Jessica L. McChesney, Saul Lapidus, Nan Yao, Maxim Krivenkov, Dmitry Marchenko, Andrei Varykhalov, Christian R. Ast, Roberto Car, Jennifer Cano, Maia G. Vergniory, N. Phuan Ong, Leslie M. Schoop
Summary: New developments in the field of topological matter are often driven by materials discovery, but many topological materials still suffer from non-ideal band structures. Introducing a new mechanism to design ideal Dirac semimetals, the nearly ideal Dirac semimetal GdSb0.46Te1.48 exhibits highly unusual transport behavior.
ADVANCED MATERIALS
(2021)
Article
Optics
Shuxin Wang, Yongjie Liu, Chenwei Liu, Wenlong Shao, Chen Wang, Meng Xiao, Guoyi Chen, Zhiqiu Yu, Chen Tao, Weijun Ke, Guojia Fang
Summary: This study demonstrates a strategy to achieve high-performance far-red perovskite light-emitting diodes (PeLEDs) through antisolvent engineering. By introducing 1,3,5-tris(1-phenyl-1H-benzimidazole-2-yl) benzene (TPBi) into the perovskite matrix, the defects are passivated, carrier mobility is balanced, and the energy level alignment between perovskite and the electron transport layer is adjusted. The PeLEDs with TPBi-modified perovskite emitters show a consistent far-red emission peak at around 735 nm with a champion external quantum efficiency of 14.22%.
LASER & PHOTONICS REVIEWS
(2023)
Article
Chemistry, Multidisciplinary
Byeongsun Jun, Chi Ho Lee, Sang Uck Lee
Summary: In this study, we systematically investigated the strain-induced carrier mobility of two organic semiconductors and revealed their relationship with intermolecular packing configurations. The results showed periodic changes of the strain-induced carrier mobility, which can be attributed to the alternating phase changes of molecular orbital interactions. These findings are of significance for optimizing carrier mobility modulation and the development of organic electronic devices.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Sarbajaya Kundu, Claude Bourbonnais, Ion Garate
Summary: This paper investigates the interplay of electron-electron and electron-phonon interactions in Dirac semimetals and finds that the Cooper channel can prevent purely electronic instabilities, while lattice instabilities can occur before purely electronic instabilities.
Article
Chemistry, Physical
Shunya Yan, Alba Cazorla, Adara Babuji, Eduardo Solano, Christian Ruzie, Yves H. Geerts, Carmen Ocal, Esther Barrena
Summary: The identification of polymorphs in organic semiconductors is significant for establishing structure-property relationships and understanding microscopic charge transport physics. By using GIWAXS and AFM, the morphology and structure of C8O-BTBT-OC8 films were found to be affected by temperature, and the molecular arrangement at the interface has a direct impact on the performance of OFETs.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Chemistry, Physical
Qian Liu, Waner He, Yongqiang Shi, Sultan Otep, Wen Liang Tan, Sergei Manzhos, Christopher R. McNeill, Xugang Guo, Prashant Sonar, Tsuyoshi Michinobu, Aung Ko Ko Kyaw
Summary: This study demonstrates the directional tunability of carrier polarity in organic ambipolar transistors using DPP- and BTI-based dual-acceptor polymers. By modifying the molecular structure and adding specific ionic additives, the polarity of charge carriers can be selectively tuned, enabling the transition from ambipolar to unipolar transport in organic field-effect transistors. This finding is highly significant for the development of complementary circuits.
CHEMISTRY OF MATERIALS
(2022)
Article
Chemistry, Physical
Zhihong Wang, Yuehao Huang, Fan Li, Yao Chuang, Zhongkai Huang, Maolin Bo
Summary: Density functional theory (DFT) calculations were used to characterize the structures of 2D semimetals, including Pb, Sb-alpha, Sb-beta, and Sn. It was found that Pb and Sb-beta exhibit semiconductor characteristics. Analysis of the charge density distribution revealed the bonding state of atoms in these materials. Overall, this study provides new insights and solutions for understanding chemical bonds in 2D semimetal materials.
CHEMICAL PHYSICS LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Turgut Yilmaz, Elio Vescovo
Summary: Low-temperature, high-resolution angle resolved photoemission experiments on bulk 1T-TiSe2 samples reveal conspicuous band folding as the only prominent signature of the periodic lattice distortion. No confirmation of a bulk electronic gap supporting a charge density wave phase is found in light of the new data. These observations cast serious doubts on the common belief of an electronic instability as the likely origin for the observed structural transition in TiSe2.
Article
Materials Science, Multidisciplinary
Marcin Matusiak, Thomas Wolf
Article
Materials Science, Multidisciplinary
Marcin Matusiak, Thomas Wolf
Article
Physics, Applied
M. Matusiak, H. Lochmajer, P. Przyslupski, K. Rogacki
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2015)
Article
Physics, Multidisciplinary
H. Lochmajer, M. Matusiak, G. Urbanik, P. Przyslupski, K. Rogacki
ACTA PHYSICA POLONICA A
(2016)
Article
Physics, Condensed Matter
Marcin Matusiak, Michal Babij, Ekaterina Pomjakushina, Kazimierz Conder
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
(2016)
Article
Multidisciplinary Sciences
Marcin Matusiak, J. R. Cooper, Dariusz Kaczorowski
NATURE COMMUNICATIONS
(2017)
Article
Physics, Condensed Matter
M. Matusiak, A. Lipatov, A. Gribanov, D. Kaczorowski
JOURNAL OF PHYSICS-CONDENSED MATTER
(2013)
Article
Physics, Applied
Marcin Matusiak, Thomas Wolf
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2019)
Article
Chemistry, Multidisciplinary
Marcin Matusiak, Anna Krzton-Maziopa
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2020)
Article
Chemistry, Multidisciplinary
Md. Shahin Alam, P. K. Tanwar, Krzysztof Dybko, Ashutosh S. Wadge, Przemyslaw Iwanowski, Andrzej Wisniewski, Marcin Matusiak
Summary: The electrical and thermo-electrical transport properties of the semimetal TaAs2 have been studied in a magnetic field, and the results indicate the presence of quantum oscillations at low temperature. The fast Fourier-transform analysis reveals two fundamental frequencies and a second harmonic of one of these frequencies. Additionally, an unusual change in the ratio between the amplitudes of these frequencies is observed with temperature, suggesting the occurrence of a spin-zero effect caused by temperature change.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2022)
Article
Materials Science, Multidisciplinary
Pardeep Kumar Tanwar, Mujeeb Ahmad, Md Shahin Alam, Xiaohan Yao, Fazel Tafti, Marcin Matusiak
Summary: Quantum anomalies refer to the breakdown of classical conservation laws in a quantum-field theory description, occurring in Weyl semimetals and leading to anomalous transport properties. Our study on the magnetic Weyl semimetal NdAlSi reveals an increase in both magnetoelectric and magnetothermal conductivities, and demonstrates the link between anomalous electric and heat currents through the 170-year-old Wiedemann-Franz law.
Article
Materials Science, Multidisciplinary
Pardeep Kumar Tanwar, Md Shahin Alam, Mujeeb Ahmad, Dariusz Kaczorowski, Marcin Matusiak
Summary: The thermal conductivity (??) of the Weyl semimetal NbP was studied with the thermal gradient and magnetic field applied parallel to the [0 0 1] direction. At low temperatures, ??(B) exhibits large quantum oscillations with frequencies matching two determined from the Shubnikov???de Haas effect. These frequencies originate from the electron pocket enclosing a pair of Weyl nodes. The amplitude of the oscillatory component of the thermal conductivity is significantly larger than the corresponding value calculated from the electrical conductivity using the Wiedemann-Franz law, possibly due to the chiral zero sound effect.
Article
Physics, Multidisciplinary
Marcin Matusiak, Tadashi Adachi, Yoichi Tanabe, Yoji Koike
PHYSICAL REVIEW RESEARCH
(2020)
Article
Materials Science, Multidisciplinary
G. Grissonnanche, F. Laliberte, S. Dufour-Beausejour, M. Matusiak, S. Badoux, F. F. Tafti, B. Michon, A. Riopel, O. Cyr-Choiniere, J. C. Baglo, B. J. Ramshaw, R. Liang, D. A. Bonn, W. N. Hardy, S. Kraemer, D. LeBoeuf, D. Graf, N. Doiron-Leyraud, Louis Taillefer
Article
Chemistry, Physical
J. Zamora, T. Bautista, N. S. Portillo-Velez, A. Reyes-Montero, H. Pfeiffer, F. Sanchez-Ochoa, H. A. Lara-Garcia
Summary: Experimental and DFT studies were conducted on the structural, magnetic, and optical properties of RFeO3 perovskites. The perovskites exhibited an orthorhombic crystal structure and weak ferromagnetic behavior. They were confirmed to be semiconductors with a bandgap of approximately 2.1 eV.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xianxiang Lv, Jing Jin, Weiguang Yang
Summary: By depositing TiN and TiO2 surface layers on AlSi films, the electrochemical performance of silicon-based anodes can be significantly improved, suppressing volume expansion and promoting the formation of a stable SEI layer.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Sharafat Ali, Haider Ali, Syedul Hasnain Bakhtiar, Sajjad Ali, Muhammad Zahid, Ahmed Ismail, Pir Muhammad Ismail, Amir Zada, Imran Khan, Huahai Shen, Rizwan Ullah, Habib Khan, Mohamed Bououdina, Xiaoqiang Wu, Fazal Raziq, Liang Qiao
Summary: The construction and optimization of redox-heterojunctions using a bifunctional phosphate as an electron-bridge demonstrated significant improvements in photo catalytic activity, including enhanced dispersion, reduced interfacial migration resistance, and increased abundance of active-sites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ren-Ni Luan, Na Xu, Chao-Ran Li, Zhi-Jie Zhang, Yu-Sheng Zhang, Jun Nan, Shu-Tao Wang, Yong-Ming Chai, Bin Dong
Summary: Extensive research has revealed that oxygen evolution reaction (OER) in alkaline conditions involves dynamic surface restructuring. The development and design of sulfide/oxide pre-catalysts can reasonably adjust the composition and structure after surface reconstruction, which is crucial for OER. This study utilized a simple two-step hydrothermal method to achieve in situ S leaching and doping, inducing the composition change and structure reconstruction of CoFe oxides. The transformed FeOOH and CoOOH exhibited excellent OER activity and could be easily mass-produced using low-cost iron based materials and simple methods.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jun'an Lai, Daofu Wu, Peng He, Kang An, Yijia Wang, Peng Feng, WeiWei Chen, Zixian Wang, Linfeng Guo, Xiaosheng Tang
Summary: Zero-dimensional organic-inorganic metal halides (OMHs) are gaining attention in the fabrication of light-emitting diodes due to their broad emission band and high photoluminescence quantum yield. This work synthesized a zero-dimensional organic tetraphenylphosphonium bismuth chloride (TBC) that showed efficient blue light emission, with the emission mechanism attributed to the transition of Bi3+ ions. White light-emitting diodes (WLEDs) were fabricated using TBC, along with green-emitting and red-emitting single crystals, achieving single-component white emissions. These findings demonstrate the different emission mechanism of ns2 ions-based OMHs and highlight the potential of bismuth-based OMHs in WLEDs applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xuewei Liang, Yunhai Su, Taisen Yang, Zhiyong Dai, Yingdi Wang, Xingping Yong
Summary: The revolutionary design concept of high-entropy alloys has brought new opportunities and challenges to the development of advanced metal materials. In this work, AlCrCuFe2NiTix high-entropy flux cored wires were prepared by combining the design idea of a high-entropy alloy with the characteristics of flux cored wire. AlCr-CuFe2NiTix high-entropy surfacing alloys were prepared using gas metal arc welding technology. The wear properties of the alloys were analyzed, and the phase composition, microstructure, strengthening mechanism, and wear mechanism were discussed. The results show that the alloys exhibit a dendritic microstructure with BCC/B2 + FCC phases. Increasing Ti content leads to the precipitation of Laves phase. The alloys show improved microhardness and wear resistance due to the precipitation of coherent B2 and Laves phases. However, excessive Ti addition results in the increase of Laves phase and reduced wear resistance of the alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
M. Vadivel, M. Senthil Pandian, P. Ramasamy, Qiang Jing, Bo Liu
Summary: This work presents the enhanced photocatalytic and electrochemical performance of g-C3N4 assisted PAA on CoFe2O4 ternary nanocomposites. The incorporation of PAA and g-C3N4 improves the separation efficiency of photogenerated charge carriers, resulting in superior photocatalytic degradation and high specific capacitance values.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Vibhu T. Sivanandan, Ramany Revathy, Arun S. Prasad
Summary: In this study, pure and doped cobalt ferrite nanoparticles were prepared using the sol-gel auto-combustion method with the aid of lemon juice as eco-fuel. The crystal structure, lattice parameter, crystallite size, microstrain, optical parameters, and room temperature magnetic properties of the samples were analyzed. The effect of doping on the magnetic properties was also investigated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qing Guo, Bowen Zhang, Benzhe Sun, Yang Qi
Summary: This study prepared ZnO films with various nonpolar preferred orientations using conventional chemical bath deposition method and characterized their growth process and mechanism. It was found that the type and concentration of nitrate could control the preferred orientation and surface roughness of ZnO films. Additionally, ZnO films with different preferred orientations exhibited different optical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Chong Zhang, Yan Liu, Zhaoyan Wang, Hang Yang
Summary: In this study, six bimetallic FeCo particles were synthesized via the hydrothermal method at different Fe:Co ratios. The Fe:Co ratio not only modulates the composition of the particles but also influences their structure and magnetic properties. The FeCo alloys showed a transformation from an Fe-based structure to a Co-based structure with increasing Co content. The Fe:Co ratio of 1:1 and 3:1 resulted in particles with the highest and lowest saturation magnetization, respectively.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jianning Zhang, Jing Li, Yiren Wang, Xiaodong Mao, Yong Jiang
Summary: We conducted a study on the formation of ultra-fine Y-Ti-Ta-O nano-oxides in Ta+B micro-alloyed 13CrWTi-ODS alloys using electron microscopy and first-principles calculations. The Y-Ti-Ta-O nano-oxides were found to be mainly Y2(Ti,Ta)2O7, with an average size of 7 nm and a number density of 6.8 x 1023 m-3. Excess boron was found to enhance the adhesion of some low-sigma grain boundaries but weaken the Fe/Y2Ti2O7 interface, while excess tantalum enhanced the Fe/Y2Ti2O7 interface but caused serious degradation of grain boundaries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Yirong Fang, Pei Cheng, Hang Yuan, Hao Zhao, Lishu Zhang
Summary: A new composite system of nitrogen-doped reduced graphene oxide and black phosphorus quantum dots has been developed for tumor therapy, showing improved electrochemical properties and stability. The system generates hydrogen peroxide and hydroxyl radical to effectively kill tumor cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xiufang Qin, Yuanli Ma, Hui Zhang, Ting Zhang, Fang Wang, Xiaohong Xu
Summary: The structure and magnetism of cobalt ferrites after Mn2+-Tb3+ co-doping were studied. Co-doped samples exhibited cubic spinel structure and spherical shape of ferrite nanoparticles. The redistribution of Co2+ and Fe3+ ions between octahedral and tetrahedral sites was observed due to Mn2+-Tb3+ co-doping. The coercivity and magnetization saturation of co-doped samples were significantly improved, leading to a maximum energy product that is 190% higher than that of the un-doped sample.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ho Yeon Lee, Wonjong Yu, Yoon Ho Lee
Summary: Recently, there has been an increasing interest in developing ultra-fine nanostructured electrodes with extensive reaction areas to enhance the performance and low-temperature operation of solid oxide fuel cells. The use of a refined approach involving co-sputtering metal alloys and oxide targets has demonstrated the feasibility of nano-columnar structures in perovskite-based electrodes, expanding the temperature range of thin film electrodes. This study systematically examines the effects of chamber pressure control in the co-sputtering process and identifies the intricate relationship between sputtering pressure and film structure. By fine-tuning the columnar growth in the electrode, significant improvements in performance and thermo-mechanical properties were achieved, resulting in high-performance all-sputtered solid oxide fuel cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qianyun Bai, Xiaoxiao Yan, Da Liu, Kang Xiang, Xin Tu, Yanhui Guo, Renbing Wu
Summary: This study proposes a simple method to develop a non-precious transition metal-based electrocatalyst with high catalytic activity and robustness for the hydrogen evolution reaction. The as-synthesized electrode exhibits a low overpotential and high current density, indicating its potential in energy conversion.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
