Article
Chemistry, Physical
Zhizhao Cai, Xinyuan Ma, Jiefeng Cai, Zhenye Zhan, Dongxu Lin, Ke Chen, Pengyi Liu, Weiguang Xie
Summary: In this study, ultrathin BCP and ZrAcac were inserted between the perovskite and BHJ layers as an interface modification, successfully regulating carrier extraction and inhibiting charge recombination at the interface. This led to significant improvements in open-circuit voltage and fill factor, resulting in high conversion efficiency.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Physical
Qingjie Feng, Guangjun Nan
Summary: The Rashba effect in different phases of MAPbX(3) (MA = CH3NH3 andX = I and Br) was investigated using the density functional theory approach. The study revealed that the Rashba effect in MAPbX(3) with the ordered arrangement of MA cations is progressively weakened as the temperature decreases, mainly due to the reduced distortion of inorganic octahedrons. Additionally, the angle-resolved Rashba splitting in MAPbI(3) is not significantly affected by going from the bulk to the surfaces in the room-temperature phase, while in MAPbBr(3), the bulk Rashba splitting collapses into anisotropic Rashba splitting at the surfaces. These findings provide insights for manipulating spin-polarized carrier dynamics in photovoltaic and spintronic devices with LHPs.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Shahidul Alam, Haya Aldosari, Christopher E. Petoukhoff, Tomas Vary, Wejdan Althobaiti, Maryam Alqurashi, Hua Tang, Jafar I. Khan, Vojtech Nadazdy, Peter Mueller-Buschbaum, Gregory C. Welch, Frederic Laquai
Summary: This study investigates the thermally-induced degradation of organic photovoltaic devices and its effect on their optical properties, photophysics, and morphology. The results show that the degradation limits the open-circuit voltage and fill factor of the devices, while the short-circuit current density is only slightly affected. Energy-resolved electrochemical impedance spectroscopy measurements reveal a higher energy barrier for charge transfer in the degraded samples. Furthermore, the study finds that field-dependent charge generation significantly limits device performance.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
Jun Yuan, Chujun Zhang, Beibei Qiu, Wei Liu, Shu Kong So, Mathieu Mainville, Mario Leclerc, Safa Shoaee, Dieter Neher, Yingping Zou
Summary: Organic solar cells (OSCs) have made rapid progress in recent years through the development of novel organic photoactive materials, particularly non-fullerene acceptors (NFAs). However, the understanding of the interplay between molecular structure and optoelectronic properties lags significantly behind. The potential role of energetic disorder in OSCs has received little attention, but recent studies have shown that state-of-the-art NFA-based devices can achieve both low energetic disorder and high power conversion efficiency (PCE).
ENERGY & ENVIRONMENTAL SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Saurav Limbu, Kyung-Bae Park, Jiaying Wu, Hyojung Cha, Sungyoung Yun, Seon-Jeong Lim, Hao Yan, Joel Luke, Gihan Ryu, Chul-Joon Heo, Sunghan Kim, Yong Wan Jin, James R. Durrant, Ji-Seon Kim
Summary: The study identified the critical role of donor molecular structure in organic photodetectors, showing that subtle structural changes in blends can significantly impact optoelectronic performance. These insights provide valuable information for the development of high-performance OPDs and highlight key differences in the design of BHJ blends for OPD and OPV devices.
Article
Nanoscience & Nanotechnology
Yeongkwon Kang, Jung Won Yoon, Seok Woo Lee, Hyungju Ahn, Siwon Yun, Jongchul Lim, Jihoon Lee, Dong Wook Chang, Hyosung Choi, Bong-Gi Kim
Summary: To investigate the effect of miscibility between conjugated polymers (CPs) and Y6 on the morphology of bulk-heterojunction (BHJ) structures, three different CPs with similar chemical structures but varying miscibility with Y6 were studied. The interface morphology and interlocked dimensions were compared quantitatively using a square-wave model after selectively removing Y6 from the CP/Y6 blend films. It was found that as CP-Y6 miscibility increases, a higher intermixed interface is formed, while a decrease in miscibility leads to a decrease in the dimensions formed by phase separation and an increase in width.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
Sarah Alsaggaf, Raja Shahid Ashraf, Balaji Purushothaman, Neha Chaturvedi, Iain McCulloch, Frederic Laquai, Jafar Iqbal Khan
Summary: This study investigates the photophysics of a novel germanium-containing donor polymer blended with nonfullerene acceptors in bulk heterojunction solar cells. The results show that the efficiency is higher with O-IDTBCN as the acceptor compared to O-IDTBR, mainly due to the low photocurrent and moderate fill factor of the latter. Geminate recombination and field-dependent charge generation are identified as key factors affecting the performance of the solar cells.
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS
(2021)
Article
Environmental Sciences
Ajeet Kumar Singh, Rajan Walia, Madan Singh Chauhan, Ravi S. Singh, Vineet Kumar Singh
Summary: Through numerical simulation studies, it was found that interface defects have a significant impact on the performance of heterojunction solar cells, and increasing the bandgap of the absorber layer can improve the performance of the solar cells. Compared to n-TiO2/p-Cu2O heterojunction solar cells, n-TiO2/p-WS2 heterojunction solar cells showed an increase in performance of nearly 182%, and the performance was further enhanced by about 139% with the addition of a p-Cu2O hole transport layer. The best-simulated efficiency of the proposed hetero-structure solar cell was 28.86%.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Electrochemistry
Qiannan Wu, Kai Zhang, Dejun Wang, Yanhong Lin, Tengfeng Xie
Summary: Surface treatments are effective strategies to reduce charges recombination of photoanodes. In this study, an E-Ti-Fe2O3 photoanode was prepared through hydrothermal, electrodepositon, and KOH treatment methods. The E-Ti-Fe2O3 photoanode exhibited a higher photocurrent density compared to Ti-Fe2O3 photoanode, and further improvement was achieved with CoPi modification. The enhanced PEC activity was attributed to the suppression of bulk and surface charges recombination, as evidenced by WF measurements, TPV measurements, and PEC tests.
ELECTROCHIMICA ACTA
(2023)
Article
Energy & Fuels
Kazuki Kohzuki, Rei Shirouchi, Shin-ichiro Natsuda, Toshiharu Saito, Yuji Sakamoto, Yasunari Tamai
Summary: Suppressing charge recombination is crucial for enhancing the power conversion efficiency of organic solar cells (OSCs). The formation of both singlet and triplet charge transfer (CT) states in OSCs indicates that charge recombination via the triplet excited state is the main pathway for deactivation. However, it has been shown that charge separation from triplet excitons can occur in nonfullerene acceptor (NFA)-based OSCs, emphasizing the significance of minimizing the energy difference between singlet and triplet excited states of NFAs to suppress charge recombination.
Article
Chemistry, Physical
Xinyue Wang, Huijie Guo, Dawei Kang, Tonu Pullerits, Peng Song
Summary: The electric-field-dependent charge-separation dynamics of non-fullerene acceptors D/A heterojunctions were simulated using Marcus theory. The excited-state characteristics on the D/A interface showed differences under different electric-field intensities, providing microscopic details of the atomic-level non-fullerene D/A interface. The reorganization energy was found to mainly determine the charge-transfer rate, which showed variation depending on the electric-field intensity and was consistent with the Marcus inverted region. The charge separation exhibited significant advantages and the trifurcated structure of the molecule provided multiple charge transfer paths for charge separation.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Physical
Zeng Chen, Xu Chen, Ziyan Jia, Guanqing Zhou, Jianqiu Xu, Yuexia Wu, Xinxin Xia, Xufeng Li, Xuning Zhang, Chao Deng, Yuan Zhang, Xinhui Lu, Weimin Liu, Chunfeng Zhang, Yang (Michael) Yang, Haiming Zhu
Summary: Nonfullerene acceptor organic solar cells with power conversion efficiency up to 18% show the formation of NFA triplet exciton as a main non-radiative recombination and energy loss channel. Side-chain fluorination in high-efficiency NFA OSCs efficiently inhibits charge recombination to NFA triplet excitons, leading to higher V-OC and PCE. This paves the way for OSCs with lower V-OC loss and efficiency exceeding 20%.
Article
Chemistry, Physical
Bingxu Liu, Yinghui Sun, Yonghuang Wu, Kai Liu, Huanyu Ye, Fangtao Li, Limeng Zhang, Yong Jiang, Rongming Wang
Summary: The high-performance MoS2-based phototransistor with enhanced photoresponse is achieved by interfacing few-layer MoS2 with an ultrathin TiO2 layer. The significantly improved photoresponse of the TiO2/MoS2 device is attributed to both interface charge transfer and photogating effects. These findings provide valuable insights into interactions at TiO2/MoS2 interface and may inspire the development of novel optoelectronic devices based on 2D layered materials.
Article
Chemistry, Physical
William Lowrie, Robert J. E. Westbrook, Junjun Guo, Hristo Ivov Gonev, Jose Marin-Beloqui, Tracey M. Clarke
Summary: Organic photovoltaics are close to achieving a landmark power conversion efficiency of 20%. Given the urgency of climate change concerns, research into renewable energy solutions is crucially important. This perspective article emphasizes the key aspects of organic photovoltaics that need to be addressed to ensure the success of this promising technology.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Sheng Jiang, Shaobing Xiong, Hongbo Wu, Dongyang Zhao, Xiaomeng You, Yehui Xu, Menghui Jia, Wei Bai, Zaifei Ma, Xianjie Liu, Yefeng Yao, Zhenrong Sun, Qinye Bao
Summary: A surface treatment strategy is developed by heat-induced decomposition of a thin interlayer 2,7-Naphthaleneditriflate (NAP) to in situ reconstruct perovskite energetics. This strategy enhances charge extraction and suppresses charge recombination, resulting in a significantly improved power conversion efficiency of perovskite solar cells (PSCs). The reconstructed surface also improves the crystallinity and stability of the perovskite film, making it a promising approach for the design of high-efficiency and stable PSCs.
ADVANCED ENERGY MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
Nadzeya A. Kukhta, Adam Marks, Christine K. Luscombe
Summary: This review focuses on recent material developments and current challenges in mixed conductors for bioelectronic applications. It also highlights the fundamental operation principles of the OECT and the current bioelectronic applications of OMIECs, as well as potential strategies for mitigating challenges in OECT channel materials.
Article
Chemistry, Multidisciplinary
Liwen Xing, Ji-Ren Liu, Xin Hong, Kendall N. Houk, Christine K. Luscombe
Summary: In this study, the mechanistic study of Pd/Ag cocatalyzed cross dehydrogenative coupling (CDC) polymerization reveals that the second chain extension cross-coupling is more efficient than the first cross-coupling, which goes against the Carothers equation. Kinetic analyses and DFT calculations provide insights into the reasons behind this phenomenon, which has implications for the synthesis of molecules where C-H bond activation may be the limiting factor.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Review
Materials Science, Multidisciplinary
Yifei He, Nadzeya A. Kukhta, Adam Marks, Christine K. Luscombe
Summary: This review investigates the influence of side chain molecular design on the properties and performance of organic electrochemical transistors (OECTs). By altering side chain moieties, properties such as ion permeability, solubility, flexibility, morphology, and sensitivity of organic mixed ionic/electronic conductors (OMIECs) can be adjusted, thereby tuning the parameters of OECTs.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Review
Polymer Science
C. K. Luscombe, S. Phan, I Sanskriti
Summary: This article reviews the development of organic semiconductors and introduces recent advances in developing more efficient synthetic pathways. The concept of synergistic catalysis is introduced, which enables controlled and energy-saving methods for synthesizing semiconducting polymers.
Review
Chemistry, Organic
Preeti Yadav, Nivedha Velmurugan, Christine K. Luscombe
Summary: In recent decades, direct C-H arylation has become a preferred tool for biaryl coupling in organic synthesis due to its simplicity, efficiency, and reduced environmental impact compared to traditional cross-coupling methods. However, the low reactivity of aryl C-H bonds often requires harsh reaction conditions, which limits its sustainability. Therefore, developing milder conditions for direct C-H arylation reactions has become an important research goal.
SYNTHESIS-STUTTGART
(2023)
Article
Chemistry, Physical
Breena M. Sperry, Nadzeya A. Kukhta, Yunping Huang, Christine K. Luscombe
Summary: In this study, the thermal decomposition of aliphatic amine and carboxylic acid ligands during the bottom-up synthesis of inorganic nanoparticles (NPs) was investigated. The results showed that the properties of ligands influenced the decomposition reaction and can be used to guide ligand selection for NP synthesis to improve reaction purity.
CHEMISTRY OF MATERIALS
(2023)
Review
Physics, Applied
Samantha Phan, Christine K. Luscombe
Summary: The increase in global demand for plastics, especially during the pandemic, has raised concerns about plastic waste and microplastic pollution. Efficient monitoring of microplastics is crucial for understanding their long-term effects and behavior in the environment. Numerical models and machine learning tools can aid in studying microplastic transport and provide more accurate predictions, helping to optimize monitoring efforts and improve understanding of microplastics in marine environments.
JOURNAL OF APPLIED PHYSICS
(2023)
Review
Chemistry, Multidisciplinary
Baitan Chakraborty, Christine K. Luscombe
Summary: Due to their versatile (opto)electronic properties, conjugated polymers have been widely used in organic electronic devices. Various cross-coupling reactions, such as Stille, Suzuki, Kumada couplings, and direct arylation reactions, have been effective for synthesizing conjugated polymers. Recent interest in donor-acceptor polymers has led to the development of cross-dehydrogenative coupling (CDC) polymerization, which allows the synthesis of alternating copolymers without prefunctionalization of monomers. This article discusses the development of CDC polymerization protocols and provides insights from small molecule CDC reactions for a better understanding of these reactions.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Lucas Q. Flagg, Jonathan W. Onorato, Christine K. Luscombe, Vinayak Bhat, Chad Risko, Ben Levy-Wendt, Michael F. Toney, Christopher R. McNeill, Guillaume Freychet, Mikhail Zhernenkov, Ruipeng Li, Lee J. Richter
Summary: Organic mixed ionic-electronic conductors (OMIECs) have the potential for various new technologies, but their complex behavior inhibits material design. This report presents the use of RXRD to determine the structure of a doped polymer OMIEC. The insights from RXRD provide important information on ion location and doping behavior, contributing to a better understanding of transport in OMIECs.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Physical
Trevor R. Martin, Leah Rynearson, Mackenzie Kuller, Joseph Quinn, Chongmin Wang, Brett Lucht, Nathan R. Neale
Summary: This study presents a new method for synthesizing polyphenylmethanimine (polyPMI), a linear or hyperbranched conjugated polymer, using an aldehyde-imine metathesis reaction. The reaction mechanisms of this polymerization are characterized by a red-shift in the absorption spectrum with increasing polymer conjugation length, attributed to extended pi-condensation based on density functional theory. This synthetic approach allows for easy recyclability of the polymer and is compatible with air- and water-sensitive chemistries. As an example of its utility, the study demonstrates the direct growth of polyPMI on silicon nanoparticles to create silicon anodes for lithium-ion batteries with high electrochemical interfacial passivation. These silicon anodes exhibit excellent cycling stability with Coulombic efficiencies above 99.9% for 500 cycles and can accommodate the expansion and contraction of silicon nanoparticles during lithiation and delithiation. Furthermore, polyPMI facilitates the formation of a chemically and mechanically stable lithium fluoride rich solid electrolyte interphase after long-term cycling.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Yunping Huang, Yangwei Shi, Theodore A. Cohen, Kevin Ho, Christine K. Luscombe
Summary: A-site cations have significant impacts on the efficiency and stability of lead halide perovskite (LHP) optoelectronic devices. However, the correlation between these impacts and cation structural features has not been studied due to the difficulty of isolating the independent contributions from the sizes of these A-site cations and hydrogen-halide interaction. In this study, we designed two isoelectronic cationic ligands and investigated their differences in passivating LHP solar cell interfaces.
CHEMISTRY OF MATERIALS
(2023)
Article
Electrochemistry
Trevor R. Martin, Glenn Teeter, Chun-Sheng Jiang, Kyusung Park
Summary: This study presents a new sulfur polymer that improves lithium-ion conductivity in solid-state batteries at low pressures. The polymer is combined with the argyrodite solid electrolyte Li6PS5Cl (LPSC) to form a stable composite SSE, which greatly enhances ionic conductivity at pressures below 2.0 MPa. The composite SSE also exhibits self-healing behavior and enables the production of solid-state batteries that cycle reversibly at only 1.6 MPa.
BATTERIES & SUPERCAPS
(2023)
Article
Chemistry, Multidisciplinary
Garrett Lecroy, Raja Ghosh, Viktoriia Untilova, Lorenzo Guio, Kevin H. Stone, Martin Brinkmann, Christine Luscombe, Frank C. Spano, Alberto Salleo
Summary: This study provides experimental data on the polarized intermolecular and intramolecular absorption of polarons in the polymer semiconductor rr-P3HT. The data is inconsistent with predictions based on the Born-Oppenheimer approximation, but consistent with a modified Holstein Hamiltonian. This work demonstrates the importance of vibronic coupling in understanding polaron absorption.
MATERIALS HORIZONS
(2023)
Review
Chemistry, Physical
Wissem Khelifi, Christine K. Luscombe
Summary: This mini-review discusses the progress in the development of polymerized small-molecule acceptors (PSMAs) for all-polymer solar cells (all-PSCs). These PSMAs combine the advantages of small-molecule acceptors (SMAs) and polymers. Studies have shown that the improved efficiency of all-PSCs is attributed to factors such as stronger absorption, improved blend morphology, and redistribution of composition in the film. Additionally, the incorporation of new materials as third components has led to high power conversion efficiencies in ternary organic photovoltaics.
CHEMICAL PHYSICS REVIEWS
(2023)
Article
Chemistry, Physical
Abdulrahman Bakry, Preeti Yadav, Shin-Ya (Emerson) Chen, Christine K. Luscombe
Summary: This study investigates the influence of the content and linkage of ethylene glycol side chains on the formation of active Grignard monomer species in the synthesis of conjugated polymers. The results suggest that a minimum concentration of 0.15 M monomer is required for synthesizing high-performing OECT material P3MEEMT. Furthermore, the study reveals that the polymerization process exhibits uncontrolled behavior contrary to the controlled chain growth characteristics.
FARADAY DISCUSSIONS
(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)