Article
Energy & Fuels
Jian Li, Qingfeng Song, Ruiheng Liu, Hongliang Dong, Qihao Zhang, Xun Shi, Shengqiang Bai, Lidong Chen
Summary: This study investigates the effect of Sm substitution in La3-xSmxTe4/Ni composites. The substitution of Sm2+ for La3+ leads to a decrease in carrier concentration, resulting in reductions in both electrical and lattice thermal conductivity. The addition of nickel improves the thermal stability of the La3-xSmxTe4 matrix. By optimizing the carrier concentration and reducing thermal conductivity, the La2.315Sm0.685Te4/10 vol.% Ni composite achieved a high thermoelectric performance.
Article
Chemistry, Physical
Melonie P. Thomas, Ahamed Ullah, Dean Cheikh, Ayanthi Thisera, Manisha De Alwis Goonatilleke, Sabah Bux, Beth S. Guiton
Summary: Lanthanum telluride is a high-performance thermoelectric material with potential applications in powering space missions. The addition of nickel nanoparticles has been shown to improve its thermoelectric performance. Advanced microscopy techniques are used to study the structure and interface stability of La3-xTe4-Ni thermoelectric composites.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Multidisciplinary Sciences
Dennis Groeneveld, Jan D. Koenig, Michael Poschmann, Hendrik Gross, Wolfgang Bensch, Lorenz Kienle, Juergen Woellenstein
Summary: This study reports on the time dependence of a synthesis procedure for generating n- and p-type bismuth telluride-based materials. The method involves mechanical pre-reaction followed by field-assisted sintering and heat treatment. The resulting samples show good thermoelectric performance despite the short milling time.
ROYAL SOCIETY OPEN SCIENCE
(2022)
Article
Anatomy & Morphology
Umit Erdem, Mustafa B. Turkoz
Summary: Hydroxyapatite co-doped with La^3+ and F^- ions was successfully synthesized and characterized. The material showed potential for dental applications based on its spectral, mechanical, and microstructure analysis results.
MICROSCOPY RESEARCH AND TECHNIQUE
(2021)
Article
Materials Science, Ceramics
Minsu Kim, Dabin Park, Jooheon Kim
Summary: Carbon cloth was used as a flexible substrate to synthesize bismuth telluride particles with added selenium for improved thermoelectric performance. The maximum power factor reached 1300 mu W/mK(2) for the 30% Se-doped sample, demonstrating the potential of carbon cloth substrate for low temperature range applications.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Andrei Novitskii, Illia Serhiienko, Andrei Nepapushev, Alexandra Ivanova, Tatyana Sviridova, Dmitry Moskovskikh, Andrei Voronin, Hiroyuki Miki, Vladimir Khovaylo
Summary: Heusler alloys have gained attention for their low toxicity, mechanical and thermal stability, relative abundance, and potential for thermoelectric power generation. The study demonstrates that the TiFe2Sn full-Heusler alloy can be obtained through mechanochemical synthesis and spark plasma sintering. By studying the influence of processing parameters, it was found that the mechanochemically processed TiFe2Sn alloy has comparable thermoelectric properties to conventionally synthesized TiFe2Sn alloy. The results suggest that mechanochemical synthesis is a convenient, scalable, and cost-effective method for preparing TiFe2Sn Heusler alloys.
Article
Engineering, Electrical & Electronic
Xubiao Zhou, Shangsheng Li, Taichao Su, Meihua Hu, Qiang Hu, Bingke Qin
Summary: In addition to excellent thermoelectric performance in the medium temperature region, tellurium also has the advantages of simple composition and not easy to segregate, making it attractive in practical manufacturing and application. This study overcame the poor electrical transport properties of tellurium by using the in situ compositing method to form a dispersoid distribution of FeTe2 in the tellurium matrix, resulting in a high carrier concentration and enhanced power factor.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Chemistry, Inorganic & Nuclear
Thi Hoa Vu, Anh Tuan Pham, Van Quang Nguyen, JongHo Park, SuDong Park, Sunglae Cho
Summary: Bismuth (Bi) was utilized to increase hole concentration in GaTe by substituting Te sites, leading to enhanced thermoelectric performance. Bi-doped GaTe single crystals showed improved carrier mobility and enhanced electrical conductivity and power factor. The thermal transport properties of GaTe single crystals were less affected by Bi doping, while a peak zT value of around 0.02 was achieved at 700 K for Bi-doped GaTe single crystals.
JOURNAL OF SOLID STATE CHEMISTRY
(2021)
Article
Nanoscience & Nanotechnology
Bingfei Nan, Xuan Song, Cheng Chang, Ke Xiao, Yu Zhang, Linlin Yang, Sharona Horta, Junshan Li, Khak Ho Lim, Maria Ibanez, Andreu Cabot
Summary: We report the development of a thiol-free tin telluride (SnTe) precursor that can be thermally decomposed to produce different-sized SnTe crystals. By decomposing the liquid SnTe precursor containing a dispersion of Cu1.5Te colloidal nanoparticles, we further engineer SnTe-Cu2SnTe3 nanocomposites with a homogeneous phase distribution. The presence of Cu effectively improves the electrical conductivity of SnTe and reduces the lattice thermal conductivity, leading to enhanced power factors and thermoelectric figures of merit.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Physics, Applied
Gwansik Kim, Kyungmi Lee, Hyunjun Shin, Jeongmin Kim, Joonyeon Chang, Jong Wook Roh, Wooyoung Lee
Summary: By investigating Cu-doped Bi2Te2.7Se0.3, it was found that Cu atoms preferentially occupied Bi sites and then intercalated into the van der Waals gap. This mechanism allowed for systematic control of the electrical transport properties of the Cu-doped samples, while also reducing the thermal conductivities through enhanced point defect phonon scattering. As a result, the dimensionless thermoelectric figure of merit (ZT) of the Cu-doped sample increased by more than 92%, reaching 0.98 at 323 K.
APPLIED PHYSICS LETTERS
(2022)
Article
Physics, Applied
W. P. Cheng, Y. D. He, R. H. Wei, L. Hu, W. H. Song, X. B. Zhu, Y. P. Sun
Summary: Designing and realizing high-efficiency p-type thermoelectric materials is crucial for integrated thermoelectric components. Thermoelectric thin films, compared to single crystal bulk materials, are more suitable for miniaturization. In this study, c-axis oriented CuRh1-xMgxO2 thin films were prepared and their thermoelectric properties were investigated. It was found that a p-type 10% Mg-doped CuRhO2 thin film exhibited a large power factor at 300 K, suggesting its potential as a p-type thermoelectric oxide for Rh-based thermoelectric thin films.
APPLIED PHYSICS LETTERS
(2022)
Article
Chemistry, Physical
Oluchi Nkwachukwu, Charles Muzenda, Babatope O. Ojo, Busisiwe N. Zwane, Babatunde A. Koiki, Benjamin O. Orimolade, Duduzile Nkosi, Nonhlangabezo Mabuba, Omotayo A. Arotiba
Summary: A perovskite-based photoelectrochemical system was developed for the degradation of organic pollutants in wastewater. La3+-doped BFO photoanodes showed enhanced performance, with the best electrode exhibiting a three times higher current response than pure BFO. The improvements in electrode performance were attributed to the synergistic effect of applied bias potential and the introduction of La3+ into the BFO matrix.
Article
Chemistry, Physical
Vikash Sharma, Divya Sharma, Ranu Bhatt, Pankaj K. Patro, Gunadhor Singh Okram
Summary: We report on the thermoelectric properties of nickel-doped Ag2-xNixTe nanostructures in a certain temperature range. The material undergoes a metal-insulator transition with increasing nickel doping concentration. The electrical resistivity and Seebeck coefficient show linear relationships with temperature. The material achieves higher thermoelectric coefficient through a sharp decrease in thermal conductivity associated with a structural phase transition.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Nirmal Kumar Velu, Yasuhiro Hayakawa, Haruhiko Udono, Yuko Inatomi
Summary: To achieve maximum efficiency, thermoelectric devices require p-type and n-type semiconductors with similar chemical, mechanical, and thermoelectric properties. In this study, zinc (Zn) element was intentionally doped with In0.95Ga0.05Sb crystal to change its conductivity from n-type to p-type. The Zn-doped In0.95Ga0.05Sb crystals exhibited increased carrier concentration and degenerate semiconducting characteristics. The maximum achieved ZT value of 0.24 at 573 K by Zn-doped In0.95Ga0.05Sb with dopant concentration 1 x 10(20) atoms/cm(3) is the highest among reported values of p-type III-V semiconductors.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Wenjie Huang, Xiaojian Tan, Jianfeng Cai, Shuai Zhuang, Chuandong Zhou, Jiehua Wu, Guoqiang Liu, Bo Liang, Jun Jiang
Summary: In this study, the thermoelectric performance of zone-melted n-type Bi2Te2.7Se0.3 material is significantly improved by co-doping with BiI3 and SnSb2Te4. BiI3, a non-toxic and non-hygroscopic electron dopant, effectively enhances the power factor and partially suppresses the bipolar effect of n-type Bi2Te2.7Se0.3. SnSb2Te4 doping introduces new scattering centers, resulting in a relatively low lattice thermal conductivity of 0.72 W m(-1) K-1 at 300 K. As a result, a maximum ZT value of 1.30 at 325 K and an average ZT value of 1.00 in the temperature range of 300-500 K are achieved in the Bi2Te2.Se-7(0.3) + 0.15 wt% BiI3 + 0.15 wt% SnSb2Te4 sample. This work provides a feasible approach to effectively improve the thermoelectric performance of n-type zone-melted Bi2Te3.
MATERIALS TODAY PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Gerald Jeffrey Snyder, Alessandro Pereyra, Ramya Gurunathan
Summary: Engineering semiconductor devices requires understanding the effective mass of electrons and holes. By combining measurements of the Seebeck and Hall effects, the density of states effective mass can be determined in doped semiconductors at room temperature and above. This method provides a simple and independent estimate of effective mass, which is helpful in understanding and designing electronic structures, particularly for characterizing thermoelectric materials.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Review
Chemistry, Multidisciplinary
Minxiang Zeng, Duncan Zavanelli, Jiahao Chen, Mortaza Saeidi-Javash, Yipu Du, Saniya LeBlanc, G. Jeffrey Snyder, Yanliang Zhang
Summary: Thermoelectric materials have the potential to convert thermal energy to electricity, and scalable manufacturing processes are needed to turn high-efficiency materials into high-performance devices. Scalable printing techniques offer precise control over compositions and microstructures, leading to improved device efficiency and system-level performance.
CHEMICAL SOCIETY REVIEWS
(2022)
Article
Chemistry, Physical
Shashwat Anand, Chris Wolverton, G. Jeffrey Snyder
Summary: When synthesizing doped compounds, it is important to accurately predict the changes caused by defects and simplify initial assessments using defect thermodynamics. Graphical guidelines based on stoichiometry of impurity phases can be used to determine the maximum solubility of dopants caused by neutral and charged defects.
CHEMISTRY OF MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Zhou Zhang, Yifan Zhu, Jialin Ji, Jianxin Zhang, Huifang Luo, Chenguang Fu, Qianqian Li, Madison Brod, G. Jeffrey Snyder, Yubo Zhang, Jiong Yang, Wenqing Zhang
Summary: In recent years, materials with metal-to-insulator phase transitions have attracted great attention due to their property variations before and after the transition. MgAgSb, an important thermoelectric material, experiences a metal-insulator transition and deterioration of thermoelectric properties in the mid-temperature beta-phase. This work reveals that the Ag atomic rearrangement between the two phases is the major reason responsible for the transition and deterioration.
MATERIALS TODAY PHYSICS
(2022)
Article
Nanoscience & Nanotechnology
Michael Y. Toriyama, Dean Cheikh, Sabah K. Bux, G. Jeffrey Snyder, Prashun Gorai
Summary: Rare-earth chalcogenide Y2Te3 is studied as a promising n-type thermoelectric material due to its low lattice thermal conductivity and tunable electron carrier concentration. Computational and defect calculations show its transport properties and optimized thermoelectric performance, as well as its potential for n-type doping using halogens.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Stefan Schwarzmueller, Daniel Souchay, Gerald Wagner, Paul Kemmesies, Daniel Guenther, Michael Bittner, Guanhua Zhang, Zefeng Ren, Armin Feldhoff, G. Jeffrey Snyder, Oliver Oeckler
Summary: In this study, it was demonstrated that a new composite material can be formed by adding copper and doping material to a specific composition of copper germanium antimony tellurides. The composite material exhibits superior thermoelectric properties suitable for temperature-dependent applications. Furthermore, strategies such as optimizing grain boundaries and temperature-induced microstructure reset were proposed to overcome material degradation during electrical current application.
CHEMISTRY OF MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Eleonora Isotta, Shizhou Jiang, Gregory Moller, Alexandra Zevalkink, G. Jeffrey Snyder, Oluwaseyi Balogun
Summary: Grain-boundary engineering is an effective strategy to tune thermal conductivity, leading to improved performance in various applications. By employing spatially resolved frequency-domain thermoreflectance, thermal imaging of individual grain boundaries is demonstrated in SnTe. Local suppressions in thermal conductivity at grain boundaries are observed. The extracted grain-boundary thermal resistance is found to be correlated with the grain-boundary misorientation angle, providing comprehensive understanding of how microstructure affects heat transport.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Ruben Bueno Villoro, Duncan Zavanelli, Chanwon Jung, Dominique Alexander Mattlat, Raana Hatami Naderloo, Nicolas Perez, Kornelius Nielsch, Gerald Jeffrey Snyder, Christina Scheu, Ran He, Siyuan Zhang
Summary: By using scanning transmission electron microscopy and atom probe tomography, this study revealed the structural differences of hexagonal close-packed lattice phases at grain boundaries in Ti-doped NbFeSb half-Heusler compounds. It was found that the enrichment of Fe leads to high electrical resistivity in Nb0.95Ti0.05FeSb, while the accumulation of Ti dopants results in good electrical conductivity in Nb0.80Ti0.20FeSb. This resistive to conductive grain boundary phase transition provides a new design space for decoupling the intertwined electronic and phononic transport in thermoelectric materials.
ADVANCED ENERGY MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
James P. Male, Brea Hogan, Max Wood, Dean Cheikh, G. Jeffrey Snyder, Sabah K. Bux
Summary: The elastic and mechanical properties of advanced RE3-xTe4 (RE = La, Pr, Nd) thermoelectric materials are significantly influenced by the cation vacancy concentration x. Increasing x leads to increased stiffness of elastic constants and decreased thermal expansion. Vickers indentation hardness and fracture toughness both decrease with increasing x, indicating more brittle behavior. These counter-intuitive mechanical property trends highlight the importance of intrinsic defects and the potential for tuning the mechanical performance of RE3-xTe4 for next-generation thermoelectric devices.
MATERIALS TODAY PHYSICS
(2023)
Article
Chemistry, Physical
Ashlee K. Hauble, Michael Y. Toriyama, Stephan Bartling, Ali M. Abdel-Mageed, G. Jeffrey Snyder, Susan M. Kauzlarich
Summary: Low-dimensional materials, such as layered Zintl phases, have unique properties that make them desirable for various applications. The complex structure and composition of layered Zintl phases pose challenges in producing phase-pure bulk samples for characterization. Eu11Zn4Sn2As12, a layered Zintl phase of significant complexity, exhibits magnetic, electronic, and thermoelectric properties, making it a promising material for further optimization and exploitation in thermoelectric applications.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Michael Y. Y. Toriyama, Adam N. N. Carranco, G. Jeffrey Snyder, Prashun Gorai
Summary: This study derives three material descriptors to evaluate the performance of narrow-gap semiconductors and semimetals in thermoelectric cooling. These descriptors include band gap, n- and p-type TE quality factors, and the asymmetry in transport between the majority and minority carriers. By applying these descriptors, three candidate room-temperature TE materials, namely SrSb2, Zn3As2, and NaCdSb, are identified from a broad set of 650 Zintl phases. These material descriptors enable fast and targeted searches for low-temperature thermoelectric narrow-gap semiconductors.
MATERIALS HORIZONS
(2023)
Article
Chemistry, Physical
Yi-Fen Tsai, Charlotte L. Stern, Bo-Chia Chen, G. Jeffrey Snyder, Hsin-Jay Wu
Summary: This work presents the discovery of a newly-found Cu8-xGe(S, Te)(6) argyrodite with a high-symmetry cubic phase stable in the entire low-to-mid temperature range (250-700 K). The substitution of sulfur with tellurium increases the configuration entropy, making Cu8-xGe(S, Te)(6) a promising mid-entropy thermoelectric (TE) alloy with ultralow thermal conductivity.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Multidisciplinary
Adetoye H. Adekoya, Shashwat Anand, G. Jeffrey Snyder
Summary: The solubility of defects is crucial in controlling the properties of engineering materials. The shape of single-phase boundaries surrounding these defects has been overlooked, despite its significant impact on material engineering. We examine the shape of single-phase boundaries for substitutional defects and find that they should be concave or star-shaped, rather than convex-like droplets. The shape depends on the thermodynamic stability of the compound, with more stable compounds having star-like phase regions.
MATERIALS HORIZONS
(2023)
Article
Chemistry, Multidisciplinary
Eleonora Isotta, Shizhou Jiang, Gregory Moller, Alexandra Zevalkink, G. Jeffrey Snyder, Oluwaseyi Balogun
Summary: Grain-boundary engineering is an effective strategy to control thermal conductivity in materials, but the mechanism by which grain boundaries modulate heat flow is not yet fully understood. In this study, thermal imaging technique revealed local suppressions in thermal conductivity at grain boundaries and showed a correlation between grain-boundary thermal resistance and misorientation angle. Extracting thermal properties from microscale imaging enables a comprehensive understanding of how microstructure affects heat transport.
ADVANCED MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Dulyawich Palaporn, Supree Pinitsoontorn, Ken Kurosaki, G. Jeffrey Snyder
Summary: This work proposes a new fabrication route for bulk Ag2Se with a tube-like porous structure via a modified cold sintering process. By optimizing the process parameters, Ag2Se achieves a maximum zT above 1.0 at 400K and an average zT around unity within the 300-400K range, representing one of the highest reported values.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Materials Science, Multidisciplinary
Mengjiao Dong, Liyun Liao, Chensheng Li, Yingxiao Mu, Yanping Huo, Zhong-Min Su, Fushun Liang
Summary: This study investigates the influence of the polarity of polymer matrices on persistent room-temperature phosphorescence (pRTP). It is discovered that intense phosphorescence emission can be achieved in highly polar matrices such as polyacrylic acid (PAA). The dipole-dipole interaction between the polar fluorophore and polar matrix is proposed to stabilize the excited state and facilitate the generation of efficient room-temperature phosphorescence emissions.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
Han-Jiang Yang, Weijia Xiang, Xiangzhou Zhang, Jin-Yun Wang, Liang-Jin Xu, Zhong-Ning Chen
Summary: This article reports a 2D copper(I)-based cluster material for X-ray imaging, which exhibits ultra-high spatial resolution, high photoluminescence efficiency, and low detection limit. The material shows excellent linear response to X-ray dose rates and light output, and has the best spatial resolution among reported lead-free metal halide hybrids.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Review
Materials Science, Multidisciplinary
Taek Joon Kim, Sang-hun Lee, Dayeong Kwon, Jinsoo Joo
Summary: Donor-acceptor heterostructures using organic-inorganic halide perovskites, two-dimensional transition metal dichalcogenides, pi-conjugated organic small/macro molecules, and quantum dots are promising platforms for exciton-based photonics and optoelectronics. Hetero-interlayer excitons and hetero-intermolecular excitons formed through optical and/or electrical charge transfer in various heterostructures are important quasi-particles for light emission, detection, and harvesting systems.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
Liemao Cao, Xiaohui Deng, Zhen-kun Tang, Rui Tan, Yee Sin Ang
Summary: We investigate the interface properties between WSi2N4 and Mo2B, O-modified Mo2B, and OH-modified Mo2B nanosheets. We find that WSi2N4 and Mo2B form n-type Schottky contacts, while functionalizing Mo2B with O and OH leads to the formation of both n-type and p-type ohmic contacts with WSi2N4. Additionally, we demonstrate the emergence of quasi-ohmic contact with ultralow lateral Schottky barrier and zero vertical interfacial tunneling barriers in Mo2B(OH)2-contacted WSi2N4.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
Ga Eun Kim, Hae-Jin Kim, Heesuk Jung, Minwoo Park
Summary: This study presents a solution to the commercialization challenges of flexible LEDs based on MAPbBr(3) by incorporating polyurethane and an In-Ga-Zn-Sn liquid alloy. The designed devices showed high flexibility, efficiency, and durability, with improved electron injection and reduced defects, making them promising for next-generation displays.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
Tao Shen, Zeng Wu, Zhen Jiang, Dongsheng Yan, Yan Zhao, Yang Wang, Yunqi Liu
Summary: Sidechain engineering is an important molecular design strategy for tuning the solid-state packing and structural ordering of conjugated polymers. The effects of sidechain direction on the optoelectronic properties of polymers and device performance were systematically investigated in this study. The results demonstrate that tuning the sidechain substitution direction can effectively improve the molecular structure and light absorption properties of polymers, providing new insights for the rational design of functional polymers.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
Lotte Clinckemalie, Bapi Pradhan, Roel Vanden Brande, Heng Zhang, Jonathan Vandenwijngaerden, Rafikul Ali Saha, Giacomo Romolini, Li Sun, Dirk Vandenbroucke, Mischa Bonn, Hai I. Wang, Elke Debroye
Summary: In this study, a facile strategy using a non-conductive polymer was proposed to fabricate stable, pinhole-free thick films. The effect of introducing a second phase into CsPbBr3 perovskite crystals on their photophysical properties and charge transport was investigated. The dual phase devices exhibited improved stability and more effective operation at higher voltages in X-ray detection.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
Jingye Zou, Shenglan Hao, Pascale Gemeiner, Nicolas Guiblin, Omar Ibder, Brahim Dkhil, Charles Paillard
Summary: When rare-earth ions are embedded in a ferroelectric material, their photoluminescence can serve as an all-optical probe for temperature, electric field, and mechanical stimulus. However, the impact of ferroelectric phase transitions on photoluminescence is not well understood. In this study, we demonstrate changes in the photoluminescence of green emission bands during critical ferroelectric transitions in an Er-doped BaTiO3 material. We also find that the intensity ratio and wavelength position difference of sub-peaks provide information on the phase transitions.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
Jiangchao Han, Daming Zhou, Wei Yang, Chen Lv, Xinhe Wang, Guodong Wei, Weisheng Zhao, Xiaoyang Lin, Shengbo Sang
Summary: Rare type-II spin-gapless semiconductors (SGSs) have attracted increasing attention due to their unique spin properties. In this study, the interface contacts and spin transport properties of different devices composed of VSi2P4 ferromagnetic layers were investigated. The results show that VSi2P4 is a promising material for designing vertical van der Waals heterostructures with a giant tunnel magnetoresistance (TMR) in spintronic applications.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
Tianqi Zhao, Renagul Abdurahman, Qianting Yang, Ruxiangul Aiwaili, Xue-Bo Yin
Summary: In this study, we designed and prepared Cr and Ba-doped gamma-Ga2O3 nanoparticles to achieve near-infrared emission and enhance the emission intensity. The emission mechanism was proposed based on the trap depth, band gap, and energy levels of Cr ions. The ratiometric temperature sensing and encryption information transfer demonstrated the potential applications of this technology.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
Shuvankar Gupta, Jyotirmoy Sau, Manoranjan Kumar, Chandan Mazumdar
Summary: In this study, a new spin-gapless semiconductor material CoFeMnSn is reported, and its stable structure and spin-polarized band structure are determined through experimental realization and theoretical calculations. The compound exhibits a high ferromagnetic transition temperature, making it excellent for room temperature applications. The nearly temperature-independent resistivity, conductivity, and carrier concentration of the compound, adherence to the Slater-Pauling rule, and the high intrinsic anomalous Hall conductivity achieved through hole doping further confirm its spin-gapless semiconductor nature. Additionally, the compound's SGS and topological properties make it suitable for spintronics and magneto-electronics devices.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
Ikumi Aratani, Yoji Horii, Yoshinori Kotani, Hitoshi Osawa, Hajime Tanida, Toshiaki Ina, Takeshi Watanabe, Yohko F. Yano, Akane Mizoguchi, Daisuke Takajo, Takashi Kajiwara
Summary: In this study, two-dimensional arrays of single-molecule magnets (SMMs) based on metal-organic frameworks (MOFs) were systematically modified through Langmuir-Blodgett methods and chemical modifications. The introduction of bulky alkoxide groups induced structural changes and perpendicular magnetic anisotropy. This research provides a promising strategy for the construction of high-density magnetic memory devices using molecular spintronics.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
Zonghao Lei, Houhe Dong, Lijie Sun, Bing Teng, Yanfei Zou, Degao Zhong
Summary: Researchers have successfully developed four different up-conversion phosphors based on the Eulytite-type host Ba3Yb(PO4)(3). The optical temperature sensing properties of these phosphors were thoroughly investigated, and it was found that Ba3Yb(PO4)(3):Tm/Er/Ho showed potential for optical temperature measurement applications.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
C. Roncero-Barrero, M. A. Carvajal, J. Ribas-Arino, I. de P. R. Moreira, M. Deumal
Summary: This study computationally investigates the conductivity of four isostructural compounds with different Se contents, and reveals the parameters that define their conductivity in stable organic radical materials. The results provide insights into the influence of Se content on the conductivity and highlight the importance of considering multiple parameters in understanding the trends in conductivity.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
Remi Arras, Kedar Sharma, Lionel Calmels
Summary: In this study, we investigated the interplay between structural defects in NiFe2O4, showing that the complex formed by a Ni-Oh/Fe-Td-cation swap and a neutral oxygen vacancy is more stable than these two isolated defects, and significantly reduces the width of the minority-spin band gap.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
