Article
Optics
Kaikai Liu, Nitesh Chauhan, Jiawei Wang, Andrei Isichenko, Grant M. Brodnik, Paul A. Morton, Ryan O. Behunin, Scott B. Papp, Daniel J. Blumenthal
Summary: Laser stabilization is crucial for precision scientific experiments and applications. This study presents a significant advancement in integrated laser linewidth narrowing and noise reduction using a photonic integrated coil resonator to stabilize a semiconductor laser.
Article
Optics
Minjia Chen, Qixiang Cheng, Masafumi Ayata, Mark Holm, Richard Penty
Summary: This study proposes, for the first time, an N x N iterative photonic processor for fast computation of complex-valued matrix inversion. Compared to traditional digital electronic processing, optical signal processing offers higher efficiency and speed. The processor is based on photonic integration platforms, providing superior processing efficiency and power efficiency, which makes it a promising solution for future optical signal processing systems.
PHOTONICS RESEARCH
(2022)
Article
Multidisciplinary Sciences
Chupao Lin, Juan Santo Domingo Penaranda, Jolien Dendooven, Christophe Detavernier, David Schaubroeck, Nico Boon, Roel Baets, Nicolas Le Thomas
Summary: The authors developed a UV-compatible photonic integrated circuit for structured illumination microscopy on a conventional wide-field microscope. The photonic circuits, designed at a wavelength of 360 nm, enable super-resolved imaging with UV light and do not require modification of the traditional imaging protocol. As a biological application, the UV photonic chips revealed features that cannot be resolved using standard wide-field microscopy.
NATURE COMMUNICATIONS
(2022)
Article
Optics
Thanavorn Poempool, Johannes Aberl, Marco Clementi, Lukas Spindlberger, Lada Vukusic, Matteo Galli, Dario Gerace, Frank Fournel, Jean-Michel Hartmann, Friedrich Schaeffler, Moritz Brehm, Thomas Fromherz
Summary: We have successfully embedded a single SiGe quantum dot (QD) into a bichromatic photonic crystal resonator (PhCR) at the position of maximum modal electric field by optimizing the MBE growth technique. Record quality (Q) factors for QD-loaded PhCRs up to Q ~ 105 have been achieved. Our findings confirm the single QD in the center of the resonator as a potentially novel photon source in the telecom spectral range.
Article
Biochemical Research Methods
Pieter Neutens, Kirill Zinoviev, Angela M. Jimenez Valencia, Gabrielle Woronoff, Roelof Jansen, Naser Hosseini, Alejandra Jauregui Uribe, Joshua Goheen, Lindsay A. Kryszak, Tim Stakenborg, William A. Clarke, Willem Van Roy
Summary: In this paper, we present a portable, compact system for performing absorption-based enzymatic assays on a photonic waveguide-based sensor chip. The results show a high correlation between the measurements taken by the photonic sensor and a commercial microplate reader, covering a clinically relevant creatinine concentration range.
JOURNAL OF BIOPHOTONICS
(2023)
Article
Physics, Applied
Ruggero Emmanuele, Wei Wang, Ashton Smith, Eric Masson, David J. Gosztola, Tijana Rajh, Saw Wai Hla, Xuedan Ma
Summary: Rare-earth ion-based materials have remarkable optical properties but also limitations due to their weak emission. In this study, we successfully couple Eu(III)-based molecular complexes to nanobeam photonic crystals, achieving a high spontaneous emission coupling efficiency. Our findings suggest that integrating rare-earth ion-based molecular complexes with photonic structures could regulate their emission characteristics for specific applications.
APPLIED PHYSICS LETTERS
(2023)
Article
Multidisciplinary Sciences
Johann Riemensberger, Nikolai Kuznetsov, Junqiu Liu, Jijun He, Rui Ning Wang, Tobias J. Kippenberg
Summary: This study demonstrates a photonic-integrated-circuit-based travelling-wave optical parametric amplifier that achieves net signal gain in the continuous-wave regime. By using ultralow-loss, dispersion-engineered Si3N4 photonic integrated circuits, researchers achieved a continuous parametric gain of 12 dB, surpassing the on-chip optical propagation loss and fibre-chip-fibre coupling losses in the telecommunication C band.
Article
Engineering, Electrical & Electronic
I. I. Ivanov, V. A. Skryshevsky, A. Belarouci
Summary: In this study, the authors investigated the application of the colorimetric approach based on CIE1931 color space for characterizing the optical response of porous silicon-based photonic crystals. They compared the colorimetric parameters with conventional parameters and found that the colorimetric approach provides a more comprehensive characterization of the optical sensor. The study also revealed that photonic crystal structures with smaller refractive indexes have higher colorimetric sensitivity.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Materials Science, Multidisciplinary
Max R. Lien, Deming Meng, Zerui Liu, Mashnoon A. Sakib, Yongkui Tang, Wei Wu, Michelle L. Povinelli
Summary: This study designs and fabricates a high-reflectivity silicon nitride photonic crystal as a material for the laser sail. The resonant features of the sail can be adjusted by changing the coatings and the infrared emissivity can be increased. Additionally, the response of the sail to temperature and optical power is characterized.
OPTICAL MATERIALS EXPRESS
(2022)
Article
Engineering, Electrical & Electronic
Anton Buchberger, Paul Maierhofer, Felix Stollberger, Anderson Singulani, Martin Sagmeister, Omar Basso, Victor Sidorov, Jochen Kraft, Marcus Baumgart, Andreas Tortschanoff, Alexander Bergmann
Summary: Sensors based on silicon nitride waveguides are being developed for biomedical and environmental applications. The first single particle detector using this technology has been successfully designed and implemented, showing promising detection capabilities for PSL particles with diameters equal to or greater than 200 nm. The photonic chip fabrication process is compatible with CMOS processes, enabling potential high-volume production.
IEEE SENSORS JOURNAL
(2021)
Article
Optics
Jiawei Wang, Kaikai Liu, Andrei Isichenko, Ryan Q. Ryan, Daniel J. Blumenthal
Summary: Photonic molecules can simulate states of matter and have applications in quantum, linear, and nonlinear optical systems. In this work, a controllable silicon nitride integrated photonic molecule with three strongly coupled ring resonators was demonstrated using ultralow-power tuning mechanisms. The design achieved high-resolution energy state engineering, with narrow linewidths, improved resonance splitting-to-width ratio, and low power consumption. These results open the door to a wide range of applications including tunable lasers, dispersion engineering, and atomic and quantum photonics.
Article
Physics, Multidisciplinary
Israel Rebolledo-Salgado, Clara Quevedo-Galan, oskar Bjarki Helgason, Anton Loof, Zhichao Ye, Fuchuan Lei, Jochen Schroder, Martin Zelan, Victor Torres-Company
Summary: In this study, platicons microcombs are generated using photonic molecules, resulting in an engineered microcomb spectrum that closely resembles the ideal single microresonator case. The authors observe the coupling between the repetition rate of the platicon microcomb and the frequency of the pump laser, and demonstrate the application of this coupling in dual-comb interferometry. These results contribute to understanding dissipative structures in normal-dispersion microresonators and offer an alternative for applications such as spectroscopy and metrology.
COMMUNICATIONS PHYSICS
(2023)
Article
Multidisciplinary Sciences
Ahmed Mehaney, Mazen M. Abadla, Hussein A. Elsayed
Summary: This research proposes a novel nonlinear delta-function photonic crystal for detecting sodium iodide (NaI) solution of different concentrations. The photonic crystal structure takes advantage of its nonlinear properties to form a defect-like resonance and easily investigate the detection of NaI with different concentrations.
SCIENTIFIC REPORTS
(2022)
Article
Engineering, Electrical & Electronic
Martino Bernard, Luca Gemma, Davide Brunelli, Giovanni Paternoster, Mher Ghulinyan
Summary: We report on the design, fabrication, and characterization of a Silicon Nitride (SiN)-based integrated photonic chip in which the dielectric waveguides are coupled to photodetectors integrated homogeneously into the Silicon substrate. The photonic-electronic coupling was realized by a 3D inverse tapering of SiN waveguides.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Itaru Yanagi, Ken-ichi Takeda
Summary: In this study, SiN membranes with thicknesses of 3-7 nm were fabricated using the SiO2 sacrificial layer process. It was found that SiN membranes as thin as 3.07 nm could be successfully formed under certain conditions, and nanopores were fabricated in these membranes via dielectric breakdown. The current noise of the membranes fabricated using the SiO2 sacrificial layer process was approximately 3/5 of that of membranes fabricated using the poly-Si sacrificial layer process.
Article
Materials Science, Multidisciplinary
Jinlong Cai, Chuanhang Guo, Liang Wang, Yiwei Fu, Chen Chen, Donghui Li, Dan Liu, Tao Wang
Summary: Halogenation of non-fullerene electron acceptors (NFAs) is an effective method to modulate their optoelectronic properties, with bromination of NFAs receiving less attention compared to fluorination and chlorination. Symmetric NFAs tend to aggregate excessively, leading to inferior device performance, while introducing asymmetry to NFAs can suppress aggregation behavior and improve device performance.
ORGANIC ELECTRONICS
(2022)
Article
Chemistry, Multidisciplinary
Elena J. Cassella, Emma L. K. Spooner, Timothy Thornber, Mary E. O'Kane, Thomas E. Catley, James E. Bishop, Joel A. Smith, Onkar S. Game, David G. Lidzey
Summary: Self-assembled monolayers (SAMs) are widely used as hole-selective layers in perovskite solar cells. Ultrasonic spray coating and airbrush coating are effective methods for depositing carbazole-based SAMs. Solvent rinsing protocols overcome the dewetting issue of hybrid perovskite precursor solutions. Air-knife gas-quenching is used to remove volatile solvents, allowing fabrication of high-efficiency p-i-n devices with large-area roll-to-roll manufacturing.
Article
Chemistry, Multidisciplinary
Kezia Sasitharan, Rachel C. Kilbride, Emma L. K. Spooner, Jenny Clark, Ahmed Iraqi, David G. Lidzey, Jonathan A. Foster
Summary: This study demonstrates a broadly applicable approach to improve the morphology of bulk heterojunction OPV devices using metal-organic nanosheets as additives. The addition of nanosheets leads to remarkable improvements in power conversion efficiency of semi-crystalline polymer devices.
Article
Optics
Khalid Namiq Sediq, Fahmi F. Muhammadsharif, Hanaa Ali Muhammad
Summary: Optimization and tuning of SiN/SiO2-based DBR stacked mirrors with high reflectivity in the visible spectrum were achieved. The thickness of the layers was adjusted to achieve a blueshift and narrowing of the stop band. The angle of incidence and substrate type had some influence on the spectral response of the DBR. Tunable DBRs with fixed material refractive index can be used for active and passive optical devices.
JOURNAL OF OPTICS-INDIA
(2022)
Article
Energy & Fuels
Dominic Blackburn, Thomas Routledge, Mary O'Kane, Elena J. Cassella, Onkar S. Game, Thomas E. Catley, Christopher J. Wood, Trevor McArdle, David George Lidzey
Summary: Tin oxide (SnOx) electron-extraction layers were fabricated using a reactive electron-beam evaporation process, achieving power conversion efficiencies up to 19.3% in standard perovskite solar cells. The deposition process of SnOx can be done at low temperature and does not require subsequent high-temperature annealing, demonstrating its potential compatibility with roll-to-roll processing on flexible polymeric substrates.
Article
Biochemistry & Molecular Biology
Mattia Russo, Kirsty E. McGhee, Tersilla Virgili, David G. Lidzey, Giulio Cerullo, Margherita Maiuri
Summary: In this study, we used two-dimensional electronic spectroscopy to investigate the dephasing processes in organic dyes. We found that the dephasing time is temperature dependent and modeled the spectral diffusion processes. Our results provide design parameters for advanced optoelectronic and photonic devices incorporating dye molecules.
Article
Nanoscience & Nanotechnology
Armando Genco, Cristina Cruciano, Matteo Corti, Kirsty E. McGhee, Benedetto Ardini, Luca Sortino, Ludwig Huettenhofer, Tersilla Virgili, David G. Lidzey, Stefan A. Maier, Andrea Bassi, Gianluca Valentini, Giulio Cerullo, Cristian Manzoni
Summary: Fourier-plane microscopy is a powerful tool for measuring the angular optical response of materials and devices. A new hyperspectral microscope technique is introduced, allowing angle- and wavelength-resolved imaging of photoluminescent organic microcavities in just one measurement. This technique provides a complete optical characterization for materials and devices with nontrivial angle-/wavelength-dependent properties.
Article
Chemistry, Multidisciplinary
Yujie Yang, Donghui Li, Jinlong Cai, Hui Wang, Chuanhang Guo, Shang Wen, Wei Li, Tao Wang, Dan Liu
Summary: By incorporating crystalline n-type molecule IDMIC-4F into the host system made of p-type polymer PM6 and n-type molecule ITCC-M, a ternary strategy is demonstrated for enhancing the photocatalytic hydrogen evolution efficiency. The compact alloy-like composite formed by ITCC-M and IDMIC-4F in the ternary p/n heterojunction NPs improves exciton dissociation and charge transfer characteristics. The optimized ternary NPs achieve an unprecedented hydrogen evolution rate of 307 mmol h(-1) g(-1) and a maximum apparent quantum efficiency of 5.9% at 600 nm.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Polymer Science
Xiaoshuai Zhang, Teng Li, Cong Yu, Weiqiang Miao, Hui Wang, Yiwei Fu, Bojun Zhou, Dan Liu, Wei Li, Tao Wang
Summary: Efficient single-layer white-light emitting diodes (WLEDs) are achieved by doping a small amount of a red polymer into the perovskite nanocrystals matrix. The emission color of the WLEDs can be tuned from cold white-light to warm white-light by adjusting the weight ratio of the nanocrystals to the polymer. With a low voltage, the WLEDs exhibit standard white-light emission with high luminance and external quantum efficiency.
Article
Materials Science, Multidisciplinary
Yuandong Sun, Chen Chen, Liang Wang, Chuanhang Guo, Jinlong Cai, Donghui Li, Bojun Zhou, Chenhao Liu, Dan Liu, Tao Wang, Wei Li
Summary: In this study, two isomeric nonfullerene acceptors (ThMeCl-1 and ThMeCl-2) were synthesized and incorporated as the third component in ternary solar cells. It was found that compared to ThMeCl-1, the incorporation of ThMeCl-2 in the solar cells resulted in lower energy loss, leading to an increase in open-circuit voltage and maximum efficiency. This work provides guidance for controlling molecular packing in ternary systems to prepare high-performance organic photovoltaics.
ACS MATERIALS LETTERS
(2023)
Article
Nanoscience & Nanotechnology
Emma L. K. Spooner, Elena J. Cassella, Joel A. Smith, Thomas E. Catley, Sam Burholt, David G. Lidzey
Summary: The introduction of Y-series non-fullerene acceptors has greatly improved the power conversion efficiencies of organic solar cells. This study demonstrates, for the first time, the deposition of a Y-series-based system using ultrasonic spray coating, which has the potential for significantly faster deposition speeds than traditional methods. The use of an air-knife enables rapid removal of the casting solvent and overcomes film reticulation, resulting in spray-coated PM6:DTY6 devices with PCEs of up to 14.1%. The study also highlights the challenges of scalable coating for Y-series-based solar cells, particularly the influence of slower drying times on blend morphology and crystallinity. The compatibility of ultrasonic spray coating with high-speed roll-to-roll OSC manufacturing techniques is demonstrated.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Chen Chen, Liang Wang, Yuandong Sun, Yiwei Fu, Chuanhang Guo, Bojun Zhou, Zirui Gan, Dan Liu, Wei Li, Tao Wang
Summary: This study demonstrates the successful construction of ternary organic solar cells (OSCs) with high fill-factor (FF) by incorporating three thiophene terminated non-fullerene acceptors (NFAs) into the state-of-the-art PM6:L8-BO system. The formation of a compact 3D honey-comb network between one of the NFAs and L8-BO contributes to the high FF and maximum power conversion efficiency of 19.1%.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Donghui Li, Liang Wang, Chuanhang Guo, Yating Liu, Bojun Zhou, Yiwei Fu, Jing Zhou, Dan Liu, Wei Li, Tao Wang
Summary: This article demonstrates the construction of high-performance ternary organic solar cells (OSCs) by co-crystallization of PM6 and D18-Cl, achieving improved efficiency through enhanced structural order and charge transport channels. Due to the similar chemical structure, larger planarity, and lower surface energy, D18-Cl is located in the PM6 phase and organizes with PM6 to form co-crystallized fibrillar donor phase. A series of binary host systems, including PM6:BTP-4F-C6-16, PM6:Y6, and PM6:Y7-BO, achieved enhanced efficiency with the presence of D18-Cl as the guest donor, leading to a superior PCE of 18.5% in the PM6:D18-Cl:BTP-4F-C6-16 ternary OSCs. This work demonstrates the use of co-crystallized polymer donor fibrils to boost the charge transport and power conversion of ternary OSCs.
ACS MATERIALS LETTERS
(2023)
Article
Energy & Fuels
Elena J. Cassella, Timothy Thornber, Robert D. J. Oliver, Mary E. O'Kane, Emma L. K. Spooner, Rachel C. Kilbride, Thomas E. Catley, Onkar S. Game, Alexandra J. Ramadan, David G. Lidzey
Summary: Defect management in perovskite solar cells through surface passivation is crucial for improving stability and efficiency. This study demonstrates the use of spray-coating technology to deposit iso-butylammonium bromide, resulting in the formation of a quasi-2D perovskite layer and significant improvement in device performance.
Article
Materials Science, Multidisciplinary
Kirsty E. McGhee, Rahul Jayaprakash, Kyriacos Georgiou, Stephanie L. Burg, David G. Lidzey
Summary: Researchers fabricated dielectric microcavities containing a molecular dye, demonstrating strong coupling despite the broad absorption line. They successfully generated polariton condensation from a strongly-coupled microcavity in air and at room temperature, showing high photostability of the dye.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
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)
