Article
Engineering, Electrical & Electronic
Xin Li, Haoran Long, Jiang Zhong, Feng Ding, Wei Li, Zucheng Zhang, Rong Song, Wen Huang, Jingyi Liang, Jialing Liu, Ruixia Wu, Bo Li, Bei Zhao, Xiangdong Yang, Zhengwei Zhang, Yuan Liu, Zhongming Wei, Jia Li, Xidong Duan
Summary: Researchers have developed a one-step chemical vapour deposition method to fabricate nanoplates of a two-dimensional metallic alloy with continuously tunable band alignment. This alloy can serve as contacts for two-dimensional semiconductors, providing improved device performance compared to metal contacts.
NATURE ELECTRONICS
(2023)
Article
Nanoscience & Nanotechnology
Alexey Lipatov, Pradeep Chaudhary, Zhao Guan, Haidong Lu, Gang Li, Olivier Cregut, Kokou Dodzi Dorkenoo, Roger Proksch, Salia Cherifi-Hertel, Ding-Fu Shao, Evgeny Y. Tsymbal, Jorge Iniguez, Alexander Sinitskii, Alexei Gruverman
Summary: Recent theoretical predictions have suggested that two-dimensional van der Waals materials may exhibit ferroelectric properties, opening up exciting possibilities for scalable low-power electronic devices. Experimental evidence of polarization response has been observed in narrow-band semiconductors and semimetals known as transition metal chalcogenides (TMCs), with molybdenum disulfide (MoS2) being one of the most promising 2D electronic materials. However, despite theoretical predictions, no ferroelectricity has been experimentally detected in MoS2, although its emergence could enhance its potential for electronics applications.
NPJ 2D MATERIALS AND APPLICATIONS
(2022)
Review
Nanoscience & Nanotechnology
Junhao Ni, Quangui Fu, Kostya (Ken) Ostrikov, Xiaofeng Gu, Haiyan Nan, Shaoqing Xiao
Summary: This article introduces various methods to achieve Ohmic contacts on two-dimensional materials and reveals their physical mechanisms. The research findings are of great significance for improving the performance of two-dimensional semiconductor devices.
Article
Chemistry, Physical
Jianqun Geng, Lei Gao, Baijin Li, Hangjing Zhou, Jianchen Lu, Jinming Cai
Summary: In this study, the researchers systematically investigated the contact properties between Cu2Se monolayer and a series of experimentally fabricated 2D metals. They found that H-NbSe2 is the most adaptable electrode for monolayer Cu2Se and discovered the fermi level pinning effects in these metal-semiconductor junctions.
APPLIED SURFACE SCIENCE
(2023)
Article
Physics, Multidisciplinary
John Cenker, Bevin Huang, Nishchay Suri, Pearl Thijssen, Aaron Miller, Tiancheng Song, Takashi Taniguchi, Kenji Watanabe, Michael A. McGuire, Di Xiao, Xiaodong Xu
Summary: In this study, two-dimensional magnons were directly observed in atomically thin CrI3 using magneto-Raman spectroscopy, revealing optical selection rules and magnetic properties. The phonon magnon mode in monolayers exhibited strict selection rules, while the optical magnon modes in bilayers and bulk materials were influenced by layer index. Additionally, two degenerate optical magnon modes with opposite angular momentum and conjugate optical selection rules were resolved in layered antiferromagnetic states.
Article
Physics, Multidisciplinary
Yi Liu, Shichao Qi, Jingchao Fang, Jian Sun, Chong Liu, Yanzhao Liu, Junjie Qi, Ying Xing, Haiwen Liu, Xi Lin, Lili Wang, Qi-Kun Xue, X. C. Xie, Jian Wang
Summary: The study found that Quantum Griffiths singularity (QGS) exists in ultrathin PdTe2 films, with QGS observed under both perpendicular and parallel magnetic fields in four-monolayer films. However, as the film thickness increases to six monolayers, QGS disappears under perpendicular field but persists under parallel field, suggesting differences in microscopic processes may be the cause of this discrepancy. This work demonstrates the universality of parallel field induced QGS and calls for further investigation on quantum phase transitions under parallel magnetic fields.
PHYSICAL REVIEW LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Mengyu Hong, Xiankun Zhang, Yu Geng, Yunan Wang, Xiaofu Wei, Li Gao, Huihui Yu, Zhihong Cao, Zheng Zhang, Yue Zhang
Summary: Metal-semiconductor contacts play a crucial role in semiconductor devices. Researchers propose a nanobelt-assisted transfer strategy that enables the universal transfer of over 20 different types of electrodes. The contacts prepared using this strategy exhibit low Schottky barriers and adhere to the Schottky-Mott rule.
Article
Multidisciplinary Sciences
Xuanzhang Li, Yang Wei, Zhijie Wang, Ya Kong, Yipeng Su, Gaotian Lu, Zhen Mei, Yi Su, Guangqi Zhang, Jianhua Xiao, Liang Liang, Jia Li, Qunqing Li, Jin Zhang, Shoushan Fan, Yuegang Zhang
Summary: A 1D semimetal-2D semiconductor contact using single-walled carbon nanotube electrodes is able to achieve contact lengths in the sub-2 nm region, with smaller van der Waals gaps and tunable Schottky barrier heights via gate potential for Ohmic contact. The study presents a basis for further miniaturization of nanoelectronics.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Shuoheng Xu, Zheng Huang, Jie Guan, Yaowu Hu
Summary: In this paper, a method called laser shock induced superplastic deformation (LSISD) is proposed to enhance the metal-semiconductor interfaces and transistor performances of 2D-TMDs. The mechanism is investigated through various experiments and simulations, and the LSISD method is applied to MoS2/graphene vertical transistors to demonstrate potential improvement in interface contact and electrical properties.
Article
Chemistry, Physical
Jinfa Chang, Tae-Jun Ko, Minyeong Je, Hee-Suk Chung, Sang Sub Han, Mashiyat Sumaiya Shawkat, Mengjing Wang, Sang Jin Park, Seung Min Yu, Tae-Sung Bae, Myoung-Woon Moon, Kyu Hwan Oh, Heechae Choi, Yang Yang, Yeonwoong Jung
Summary: The new Pt-based catalyst M-PtTe2, composed of vertically- and horizontally aligned 2D PtTe2 layers, shows significantly improved ORR performance and extremely low alcohol adsorption energies, making it highly suitable for alcohol tolerant DLFCs. This new understanding of the role of 2D layer orientation in ORR kinetics and thermodynamics suggests useful catalyst design principles.
ACS ENERGY LETTERS
(2021)
Article
Chemistry, Physical
Xinxin Wang, Shiqiang Yu, Yushuo Xu, Baibiao Huang, Ying Dai, Wei Wei
Summary: In the current stage, conventional silicon-based devices face limitations in scaling and Fermi level pinning effect. Therefore, the search for low-resistance metal contacts for semiconductors, especially two-dimensional (2D) metal/semiconductor contacts, has become crucial. However, the practical applications of these contacts are hindered by the Schottky barrier and tunneling barrier. To address this issue, this work proposes a new strategy of constructing a donor-acceptor heterostructure, Ca2N/MoS2, to reduce the contact potential barrier. The results demonstrate excellent performance of n-type Ohmic contact formation between Ca2N and MoS2, as well as the potential for forming Ohmic contacts with other TMDCs like WS2, MoSe2, WSe2, and MoTe2.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Jung Hyun Ryu, Jeong-Gyu Kim, Bongjae Kim, Kyoo Kim, Sooran Kim, Jae-Hoon Park, Byeong-Gyu Park, Younghak Kim, Kyung-Tae Ko, Kimoon Lee
Summary: Researchers have discovered experimental evidence of strong interlayer coupling in 2D PdSe2, which originates from the unique directional bonding of Pd d orbitals. This interlayer coupling plays a decisive role in the strong layer-dependency of the band gap.
Review
Chemistry, Multidisciplinary
Kashmiri Baruah, Pritam Deb
Summary: Direct oxidation fuel cell (DOFC) is considered a green alternative to fossil fuels with economic viability and high efficiency, with the anode catalyst being a critical component. Recently, there has been increased interest in using 2D materials as anode catalysts due to their excellent electrochemical properties, offering potential solutions to challenges in DOFC development.
NANOSCALE ADVANCES
(2021)
Article
Multidisciplinary Sciences
Weisheng Li, Xiaoshu Gong, Zhihao Yu, Liang Ma, Wenjie Sun, Si Gao, Cagil Koroglu, Wenfeng Wang, Lei Liu, Taotao Li, Hongkai Ning, Dongxu Fan, Yifei Xu, Xuecou Tu, Tao Xu, Litao Sun, Wenhui Wang, Junpeng Lu, Zhenhua Ni, Jia Li, Xidong Duan, Peng Wang, Yuefeng Nie, Hao Qiu, Yi Shi, Eric Pop, Jinlan Wang, Xinran Wang
Summary: By hybridizing with semi-metallic antimony (0112) through strong van der Waals interactions, the electrical contact of monolayer molybdenum disulfide is improved, meeting the requirements for the development of next-generation electronics.
Article
Chemistry, Multidisciplinary
Victor H. Guarochico-Moreira, Jose L. Sambricio, Khalid Omari, Christopher R. Anderson, Denis A. Bandurin, Jesus C. Toscano-Figueroa, Noel Natera-Cordero, Kenji Watanabe, Takashi Taniguchi, Irina Grigorieva, Ivan J. Vera-Marun
Summary: Spin injection and tunable spin signal in graphene have been achieved using van der Waals heterostructures with one-dimensional (1D) contacts. This architecture prevents significant doping from the contacts, enabling high-quality graphene channels. At low temperature, spin signals can be enhanced by electrostatic gating.
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)