Article
Chemistry, Physical
Yupiao Wu, Shuo-En Wu, Jinjin Hei, Longhui Zeng, Pei Lin, Zhifeng Shi, Qingming Chen, Xinjian Li, Xuechao Yu, Di Wu
Summary: This study presents the controllable growth of large-area 2D MoSe2 layers and the fabrication of a high-quality n-MoSe2/p-Si van der Waals heterojunction device. The device exhibited a self-driven broadband photoresponse with impressive responsivity, specific detectivity, and response time. Furthermore, a 4 x 4 integrated heterojunction device array was achieved with good uniformity and satisfying imaging capability. The large-area 2D MoSe2 layer and its heterojunction device array hold great promise for high-performance photodetection and imaging applications in integrated optoelectronic systems.
Article
Chemistry, Physical
Naveen Kumar, Malkeshkumar Patel, Donggun Lim, Kibum Lee, Joondong Kim
Summary: Van der Waals and wide bandgap materials play a crucial role in the development of solar energy-activated photoelectric devices and power electronics. This study presents a novel heterojunction of van der Waal and wide bandgap materials for transparent photovoltaics (TPV), which exhibits high optical transparency and impressive photoelectric performance.
SURFACES AND INTERFACES
(2022)
Article
Nanoscience & Nanotechnology
Di Wu, Zhiheng Mo, Yanbing Han, Pei Lin, Zhifeng Shi, Xu Chen, Yongtao Tian, Xin Jian Li, Huiyu Yuan, Yuen Hong Tsang
Summary: The study successfully fabricated a PdSe2/CdTe mixed-dimensional van der Waals heterojunction capable of detecting long-wave infrared radiation at room temperature. The device has a fast response rate, high responsivity, and reasonable specific detectivity, making it suitable for detecting short pulse infrared signals and highly sensitive to polarized infrared light signals.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Computer Science, Information Systems
Xing Liu, Wenhui Wang, Fang Yang, Shaopeng Feng, Zhenliang Hu, Junpeng Lu, Zhenhua Ni
Summary: A high-performance broadband photodetector was demonstrated by constructing a Bi2O2Se/BP van der Waals heterojunction, showing low dark current and fast response time, with high responsivity and specific detectivity at different wavelengths.
SCIENCE CHINA-INFORMATION SCIENCES
(2021)
Article
Chemistry, Multidisciplinary
Sungjun Kim, Sunghun Lee, Seyong Oh, Kyeong-Bae Lee, Je-Jun Lee, Byeongchan Kim, Keun Heo, Jin-Hong Park
Summary: A ferroelectric gating ReS2/WSe2 vdW heterojunction-channel photodetector is presented in this study, which achieves broadband light detection and can be expanded up to 2700 nm. The staggered type-II bandgap alignment creates an interlayer gap of 0.46 eV between the valence band maximum of WSe2 and the conduction band minimum of ReS2. By controlling the ferroelectric dipole polarity of P(VDF-TrFE) at a specific wavelength, the device achieves high photoresponsivity, low dark current, and full-range near infrared detection capability.
Article
Physics, Multidisciplinary
Yancai Xu, Rong Zhou, Qin Yin, Jiao Li, Guoxiang Si, Hongbin Zhang
Summary: An organic/inorganic hybrid van der Waals heterostructure with an atomically abrupt interface was prepared in this study, and a self-powered photodetector was constructed based on this hybrid heterojunction. The photodetector showed excellent performance with high on/off current ratio, maximum photocurrent, responsivity, detectivity, and fast response time. The designed heterojunction photodetector has promising applications in the field of multifunctional optoelectronics.
Article
Materials Science, Multidisciplinary
Naveen Kumar, Muhammad Kumail, Junghyun Lee, Hyeong Gi Park, Joondong Kim
Summary: In this study, a self-powered transparent photodetector consisting of a vdW semiconductor (SnS) and a wide-bandgap oxide (Ga2O3) thin film was successfully fabricated. The device is highly transparent with an average visible transmittance of 45%. Under illumination, the self-biased transparent photodetector exhibits photovoltaic behavior, with a significant open circuit voltage of 496 mV and a considerably high short-circuit current density of 1.7 mA/cm^2. The device shows a significant photoresponse from UV (340 nm) to NIR (850 nm) illumination, with a remarkable responsivity of 210.4 mA/W and the fastest response time of approximately 8 ms, making it a self-operated broadband transparent photodetector.
MATERIALS RESEARCH BULLETIN
(2023)
Article
Nanoscience & Nanotechnology
Guanghui Wang, Bin Han, Chun Hong Mak, Jialong Liu, Bo Liu, Peng Liu, Xiaodong Hao, Hongyue Wang, Shufang Ma, Bingshe Xu, Hsien-Yi Hsu
Summary: This study demonstrates a photodetector with a mixed-dimensional van der Waals heterostructure of hBN/Gr/1D CH3NH3PbI3, which shows improved carrier extraction, excellent responsivity, and specific detectivity. The device also exhibits high stability when exposed to air due to the atomic encapsulation of hBN.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Yurong Jiang, Ruiqi Wang, Xueping Li, Zinan Ma, Lin Li, Jian Su, Yong Yan, Xiaohui Song, Congxin Xia
Summary: This study demonstrates an efficient method to optimize the photoelectric performance of vdWH by introducing the photovoltaic field effect. The proposed photodiode based on double vdWHs shows a high responsivity of 715 mA.W-1 and fast response time of 45 mu s, indicating excellent self-powered ability.
Article
Chemistry, Physical
Ick-Joon Park, Tae In Kim
Summary: In this study, the superior properties of two-dimensional van der Waals heterojunctions and their potential for enhanced optoelectronic devices are demonstrated. The band alignment at the MoS2/GO heterojunction is investigated, revealing a type II band alignment. It is found that the band alignment can be controlled by modifying the thickness of MoS2 and the degree of reduction in GO. This research provides valuable insights for the development of next-generation optoelectronic applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Huiming Shang, Yunxia Hu, Feng Gao, Mingjin Dai, Shichao Zhang, Shuai Wang, Decai Ouyang, Xinyu Li, Xin Song, Bo Gao, Tianyou Zhai, PingAn Hu
Summary: This study presents a high-gain photodetector based on a vertical InSe/GaSe heterojunction. By inducing carrier recirculation, the device achieves improved optoelectronic performance and sensitivity. The heterojunction also exhibits the ability to detect weaker light, highlighting its potential for various applications.
Article
Chemistry, Physical
Yushuang Fu, Xinlin Liu, Cailing Liu, Yiguo Xu, Ayesha Khan Tareen, Karim Khan, Swelm Wageh, Omar A. Al-Hartomy, Abdullah G. Al-Sehemi, Han Zhang, Ye Zhang
Summary: In this study, a mixed-dimensional heterojunction of 0D Bismuth nanoparticles (Bi NPs) coated 2D Borophene (B@Bi) was prepared by a hydrothermal method. The resulting B@Bi-based photodetector (PD) exhibited enhanced self-powered photodetection properties, fast response and recovery speed, and repeatable ON/OFF switch signals after 30 days. This work provides an opportunity for fabricating high-performance mixed-dimensional B@Bi-based PDs with good long-term stability.
APPLIED SURFACE SCIENCE
(2023)
Article
Nanoscience & Nanotechnology
Lingxian Kong, Guangliang Li, Qi Su, Xianhua Tan, Xuning Zhang, Zhiyong Liu, Guanglan Liao, Bo Sun, Tielin Shi
Summary: This study demonstrates the use of a MoTe2/MoS2 2D heterojunction to improve the performance of photodetectors and achieve polarization-sensitive, self-powered, and broadband photodetection and imaging. The device has a self-powered photoresponse ranging from 520 to 1550 nm due to the built-in electric field of the heterojunction. Under 915 nm light illumination, the device shows outstanding performance, including high responsivity, specific detectivity, fast rise/decay time, and high on/off ratio. The polarization imaging capabilities of the device in scattering surroundings are also demonstrated, with significant contrast enhancement compared to S-0. This work opens up new avenues for developing high-performance polarization-sensitive photodetection and next-generation polarized imaging using anisotropic semimetals heterojunction photodetectors.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Ya Feng, Henan Li, Taiki Inoue, Shohei Chiashi, Slava Rotkin, Rong Xiang, Shigeo Maruyama
Summary: The synthesis of one-dimensional van der Waals heterostructures enables new possibilities in electronics and optoelectronics, with different electrical characteristics induced by natural doping in semiconducting single-walled carbon nanotubes and molybdenum disulfide. Assembling semiconducting single-walled carbon nanotubes, insulating boron nitride nanotubes, and semiconducting molybdenum disulfide nanotubes creates a radial semiconductor-insulator-semiconductor heterojunction. Application of opposite potential polarity on these nanotubes leads to a rectifying effect.
Article
Chemistry, Physical
Shuo Li, Qiang Wu, Haokun Ding, Songsong Wu, Xinwei Cai, Rui Wang, Jun Xiong, Guangyang Lin, Wei Huang, Songyan Chen, Cheng Li
Summary: In this study, a p-WSe2/n-Ge vdW heterojunction phototransistor with a Schottky barrier collector on n-Ge for broadband photodetection is reported. The phototransistor exhibits high responsivities, photocurrent gain, and fast response time, making it suitable for high-performance broadband photodetection.
Article
Materials Science, Multidisciplinary
Mitisha Jain, Silvan Kretschmer, Katja Hoeflich, Joao Marcelo Jordao Lopes, Arkady Krasheninnikov
Summary: Using simulations, defects in epitaxial graphene on SiC upon ion irradiation are studied. The results show that the substrate has minimal effect for He-ion irradiation but has a significant effect for Ne-ion irradiation. These findings can guide experimental design for defect-mediated engineering.
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Himani Arora, Zahra Fekri, Yagnika Nandlal Vekariya, Phanish Chava, Kenji Watanabe, Takashi Taniguchi, Manfred Helm, Artur Erbe
Summary: In this study, a fully-encapsulated BP-based field-effect transistor (FET) scheme is employed using a lithography-free via-encapsulation method. The electrical properties of the via-encapsulated BP FETs are found to be significantly improved compared to unencapsulated devices. The results demonstrate that the via-contacting scheme leads to superior performance in terms of higher mobility, lower hysteresis, and long-term ambient stability in BP FETs.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Chemistry, Multidisciplinary
Xing Huang, Shuai Fu, Cong Lin, Yang Lu, Mingchao Wang, Peng Zhang, Chuanhui Huang, Zichao Li, Zhongquan Liao, Ye Zou, Jian Li, Shengqiang Zhou, Manfred Helm, Petko St. Petkov, Thomas Heine, Mischa Bonn, Hai I. Wang, Xinliang Feng, Renhao Dong
Summary: In this study, a strategy for synthesizing high-mobility semiconducting conjugated coordination polymers (c-CPs) using novel conjugated ligands with D2h symmetry was demonstrated. The reduced symmetry of the 4 + 2 ligands compared to conventional phenyl ligands led to anisotropic coordination in the formation of c-CPs. A single-crystalline three-dimensional (3D) c-CP Cu4DHTTB with orthogonal ribbon-like pi-d conjugated chains was successfully achieved. This c-CP exhibited a small band gap, dispersive energy bands, and high charge carrier mobilities, laying the foundation for high-performance c-CP-based (opto-)electronics.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Physical
Marco Lunardon, Tomasz Kosmala, Mahdi Ghorbani-Asl, Arkady V. Krasheninnikov, Sadhu Kolekar, Christian Durante, Matthias Batzill, Stefano Agnoli, Gaetano Granozzi
Summary: Unraveling the structure-activity relationships in catalysis is challenging due to the complexity and heterogeneity of materials. This study utilizes electrochemical scanning tunneling microscopy (EC-STM) to analyze the noise in the current and evaluates the catalytic activity of different surface sites.
ACS ENERGY LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Yi Li, Juanmei Duan, Yonder Berencen, Rene Hubner, Hsu-Sheng Tsai, Chia-Nung Kuo, Chin Shan Lue, Manfred Helm, Shengqiang Zhou, Slawomir Prucnal
Summary: In this work, we fabricated vertical p-n heterojunctions made of p-type tin monoselenide (SnSe) and n-type tin diselenide (SnSe2) through NH3 plasma-assisted phase transformation. Optimal plasma parameters were determined for the full transformation of SnSe2 into SnSe within a few seconds. The crystal quality and topography of the heterostructures were characterized using micro-Raman spectroscopy and transmission electron microscopy, and the formation of a p-n junction was confirmed through current-voltage measurements.
NANOSCALE ADVANCES
(2023)
Article
Physics, Applied
Yongjian Luo, Changan Wang, Chao Chen, Yuan Gao, Fei Sun, Caiwen Li, Xiaozhe Yin, Chunlai Luo, Ulrich Kentsch, Xiangbin Cai, Mei Bai, Zhen Fan, Minghui Qin, Min Zeng, Jiyan Dai, Guofu Zhou, Xubing Lu, Xiaojie Lou, Shengqiang Zhou, Xingsen Gao, Deyang Chen, Jun-Ming Liu
Summary: In order to enhance energy storage density, both maximum polarization (P-max) and breakdown strength (E-b) need to be improved, even though they are inversely correlated. This study achieved order-disorder transition induced polar nanoregions in PbZrO3 thin films through low-energy ion implantation, overcoming the tradeoff between high polarizability and breakdown strength. This resulted in a tripling of the energy storage density from 20.5 to 62.3 J/cm(3) and a significant enhancement of breakdown strength. This approach can be extended to other dielectric oxides to improve energy storage performance and tailor oxide functionalities.
APPLIED PHYSICS REVIEWS
(2023)
Article
Nanoscience & Nanotechnology
Minh N. N. Bui, Stefan Rost, Manuel Auge, Lanqing Zhou, Christoph Friedrich, Stefan Bluegel, Silvan Kretschmer, Arkady V. V. Krasheninnikov, Kenji Watanabe, Takashi Taniguchi, Hans C. C. Hofsaess, Detlev Gruetzmacher, Beata E. E. Kardynal
Summary: This paper investigates the optical properties of an exfoliated MoSe(2) monolayer implanted with Cr+ ions accelerated to 25 eV. The photoluminescence of implanted MoSe2 exhibits an emission line from Cr-related defects, which is only observed under weak electron doping. Unlike band-to-band transitions, the emission introduced by Cr is characterized by nonzero activation energy, long lifetimes, and weak response to the magnetic field. By modeling the Cr-ion irradiation process using ab initio molecular dynamics simulations and electronic structure calculations, the authors provide insights into the atomic structure of the defects, suggesting recombination of electrons on acceptors with valence band holes as the most likely origin of the low-energy emission. The results demonstrate the potential of low-energy ion implantation as a doping tool to tailor the properties of two-dimensional materials.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Mingchao Wang, Gang Wang, Chandrasekhar Naisa, Yubin Fu, Sai Manoj Gali, Silvia Paasch, Mao Wang, Haiko Wittkaemper, Christian Papp, Eike Brunner, Shengqiang Zhou, David Beljonne, Hans-Peter Steinrueck, Renhao Dong, Xinliang Feng
Summary: The study reports a 2D c-COF electrode material that can store protons rapidly in mild aqueous electrolyte and strong acid. The unique proton affinity mechanism of the 2D c-COF is revealed, and the outstanding rate capability is demonstrated.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Physics, Applied
Moritz Hoesch, Olena Fedchenko, Mao Wang, Christoph Schlueter, Dmitrii Potorochin, Katerina Medjanik, Sergey Babenkov, Anca S. Ciobanu, Aimo Winkelmann, Hans-Joachim Elmers, Shengqiang Zhou, Manfred Helm, Gerd Schoenhense
Summary: Multiple dopant configurations of Te impurities in silicon are investigated using various techniques. Strong chemical core level shifts distinguish these configurations from isolated impurities. Multi-Te configurations, such as dimers or Te ions surrounding a vacancy, are clearly identified. The results contribute to understanding the exceptional activation of free charge carriers in hyperdoping of chalcogens in silicon.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Physical
Ilya V. Chepkasov, Arkady V. Krasheninnikov
Summary: Using first-principles calculations, we investigate the energy characteristics of alkali metal (AM) atom intercalation into bulk tetracene crystals. We find that intercalation of AM atoms (Li, Na, K, Rb, Cs) into bulk tetracene crystals is energetically favorable, with lower intercalation energy than that for graphite. The intercalated crystals show high diffusivity and can exhibit semiconducting-metallic-semiconducting behavior as the AM atom concentration increases.
Article
Physics, Applied
Juanmei Duan, Maciej O. Liedke, Wojciech Dawidowski, Rang Li, Maik Butterling, Eric Hirschmann, Andreas Wagner, Mao Wang, Lawrence Boyu Young, Yen-Hsun Glen Lin, Minghwei Hong, Manfred Helm, Shengqiang Zhou, Slawomir Prucnal
Summary: In this study, the effect of intense pulsed light melting on defect distribution and activation efficiency in chalcogenide-implanted GaAs was investigated. The results showed that after nanosecond pulsed light melting, the main defects in heavily doped GaAs are gallium vacancies decorated with chalcogenide atoms substituting As.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Lucia Skopinski, Silvan Kretschmer, Philipp Ernst, Matthias Herder, Lukas Madauss, Lars Breuer, Arkady V. Krasheninnikov, Marika Schleberger
Summary: A key problem in ion-solid interaction is the lack of experimental access to the dynamics of the processes. In this study, substrate-supported monolayers of MoS2 were irradiated with highly charged xenon ions, and the emitted Mo particles were analyzed to determine their velocity distributions. The results indicate that the mechanisms of interaction and sputtering depend on the kinetic and potential energy of the projectile, with potential sputtering being primarily related to electron-phonon coupling.
Article
Chemistry, Multidisciplinary
Qiunan Liu, Yung-Chang Lin, Silvan Kretschmer, Mahdi Ghorbani-Asl, Pablo Solis-Fernandez, Ming-Deng Siao, Po-Wen Chiu, Hiroki Ago, Arkady V. Krasheninnikov, Kazu Suenaga
Summary: This study investigates the atomic structural transformation of molybdenum(V) chloride after intercalation into bilayer graphene. The results reveal giant lattice distortions and frequent structural transitions in the intercalated material, which have never been observed in metal chloride systems. The findings deepen our understanding of matter behavior in confined spaces and provide insights for more efficient tuning of material properties through intercalation.
Article
Geochemistry & Geophysics
Asim Siddique, Peter Boelens, Fangchao Long, Shengqiang Zhou, Veerle Cnudde, Thomas Leissner
Summary: Magnetic separation plays a crucial role in mineral processing and recycling industries. This study proposes a methodology to comprehensively characterize and classify Waste Electrical and Electronic Equipment (WEEE) slag, aiming to establish the connection between slag properties and the separation process. The methodology involves sieving, classification based on magnetic susceptibility, and mineral liberation analysis. This in-depth analysis provides insights into the separation behavior of different slag phases, contributing to the development of predictive separation models.
Article
Chemistry, Multidisciplinary
Alexander Storm, Janis Koester, Mahdi Ghorbani-Asl, Silvan Kretschmer, Tatiana E. Gorelik, Michael Kiarie Kinyanjui, Arkady V. Krasheninnikov, Ute Kaiser
Summary: This study investigates the modification of freestanding quasi-2D MnPS3 through electron irradiation and thermal annealing.The results show that different MnS phases form in both cases, and these phase transformations can be locally controlled by adjusting the size of the electron beam and the total applied electron dose.
