Article
Chemistry, Multidisciplinary
Christy Roshini Paul Inbaraj, Roshan Jesus Mathew, Rajesh Kumar Ulaganathan, Raman Sankar, Monika Kataria, Hsia Yu Lin, Yit-Tsong Chen, Mario Hofmann, Chih-Hao Lee, Yang-Fang Chen
Summary: By utilizing a mechanically tunable device concept, this research demonstrates a route towards increased integration density, with bi-anti-ambipolar transistors showing two distinct peaks in transconductance. The dynamic deformation of the device reveals the co-occurrence of two conduction pathways as the origin of this previously unobserved behavior.
Article
Engineering, Electrical & Electronic
Xuan Hu, Amy S. Abraham, Jean Anne C. Incorvia, Joseph S. Friedman
Summary: The study introduces a new hybrid ambipolar-PTL logic family that combines the compact logic of PTL with the ambipolar capabilities of ambipolar field-effect transistors, aiming to enhance overall system efficiency.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS
(2021)
Article
Chemistry, Physical
Yonghai Li, Jinran Yu, Yichen Wei, Yifei Wang, Liuqi Cheng, Zhenyu Feng, Ya Yang, Zhong Lin Wang, Qijun Sun
Summary: In this study, two-dimensional tribotronic devices were successfully used for electromechanical modulation of channel conductance, finding applications in intelligent sensing systems, touch screens, and logic gates. The researchers demonstrated an ambipolar tribotronic transistor made of molybdenum ditelluride (MoTe2), showing typical ambipolar transport properties modulated by triboelectric potential. A complementary tribotronic inverter based on single flake of MoTe2 was also demonstrated. These findings present an active approach to efficiently modulate semiconductor devices and logic circuits based on 2D materials through external mechanical signal, with potential applications in human-machine interaction, intelligent sensors, and wearable devices.
Article
Chemistry, Multidisciplinary
Liefeng Feng, Kaijin Liu, Miaoyu Wang
Summary: The application of layered black phosphorus materials is guided by the precise relationship between material thickness and material properties. Black phosphorus, as a two-dimensional semiconductor material with excellent optoelectronic properties, has attracted widespread attention. The output characteristics and transfer characteristics of BP-FETs with different BP thicknesses were analyzed in detail, and it was found that the source-drain current (I-ds) of devices is directly related to the BP thickness.
APPLIED SCIENCES-BASEL
(2023)
Article
Materials Science, Multidisciplinary
Jingyi Ma, Xinyu Chen, Yaochen Sheng, Ling Tong, Xiaojiao Guo, Minxing Zhang, Chen Luo, Lingyi Zong, Yin Xia, Chuming Sheng, Yin Wang, Saifei Gou, Xinyu Wang, Xing Wu, Peng Zhou, David Wei Zhang, Chenjian Wu, Wenzhong Bao
Summary: This study investigates a doping-free strategy using top-gated MoS2 field-effect transistors with various metal gates. Different metals with different work functions provide a convenient tuning knob for controlling the threshold voltage of the MoS2 FETs. By achieving matched electrical properties for load and driver transistors in an inverter circuit, wafer-scale MoS2 inverter arrays with optimized switching threshold voltage and voltage gain were successfully demonstrated.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Analytical
Qikun Xu, Boyang Zong, Yuehong Yang, Qiuju Li, Shun Mao
Summary: This study reports a black phosphorus quantum dots modified Ti3C2Tx nanosheet, which shows excellent NO2 detection performance as the sensing channel in a gas sensor. The study also investigates the effects of humidity and temperature on the sensor performance and proposes an efficient calibration strategy to eliminate the humidity effect. The results demonstrate enhanced sensitivity and selectivity of the black phosphorus quantum dots modified Ti3C2Tx nanosheet.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Chemistry, Multidisciplinary
Jiaxin Yang, Qingqing Liu, Mengxiao Hu, Shang Ding, Jinyu Liu, Yongshuai Wang, Dan Liu, Haikuo Gao, Wenping Hu, Huanli Dong
Summary: A novel asymmetric thiophene/pyridine-flanked diketopyrrolopyrrole-based copolymer, PPyTDPP-2FBT, with well-balanced ambipolar charge transport properties and balanced hole and electron mobilities was successfully synthesized. This copolymer was used to construct organic digital and analog circuits with a high gain of 133, showcasing its potential for applications in organic integrated electronic circuits.
SCIENCE CHINA-CHEMISTRY
(2021)
Article
Nanoscience & Nanotechnology
Haewon Cho, Pavan Pujar, Yong In Cho, Seongin Hong, Sunkook Kim
Summary: The study introduces high-stability tungsten diselenide (WSe2) field-effect transistors (FETs) with ultrathin Al-assisted alumina (Al2O3) passivation, converting the transport behavior from p-type to ambipolar. The stability of the FETs against gate bias and illumination stress is greatly improved, showcasing a promising approach for enhancing TMD-based FETs for future logic applications.
ADVANCED ELECTRONIC MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Xiaoyan Chen, Qiuju Li, Taoyue Yuan, Mengtao Ma, Ziwei Ye, Xiaojie Wei, Xian Fang, Shun Mao
Summary: A water-stable BP FET sensor for antibiotic detection is developed by employing a surface engineering strategy with Ag+ coordination and MC supramolecular passivation. The BPAg(+)/MC/MIPs sensor shows high sensitivity, low detection limit, and rapid response to tetracycline, as well as high selectivity against other antibiotics. A new sensing mechanism based on the probe structure and the electrostatic gating effect is proposed. This work enables the application of 2D BP for antibiotic detection in aqueous medium and reveals a new sensing mechanism in chemical analysis by FET sensors.
Article
Chemistry, Multidisciplinary
Yeeun Kim, Chulmin Kim, Soo Yeon Kim, Byung Chul Lee, Youkyung Seo, Hyeran Cho, Gyu-Tae Kim, Min-Kyu Joo
Summary: This study reports on the emergence of quantum tunneling at the charge neutrality point in ambipolar multilayered black phosphorus transistors without heterojunctions, demonstrating the impact of local carrier density profile and drain bias on activation energy and local resistance, ultimately allowing for the observation of band-to-band tunneling at high temperatures.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Engineering, Electrical & Electronic
Leslie M. Valdez-Sandoval, Eloy Ramirez-Garcia, Saungeun Park, Deji Akinwande, David Jimenez, Anibal Pacheco-Sanchez
Summary: This study introduces a small-signal high-frequency equivalent circuit to accurately model the AC performances of black-phosphorus field-effect transistors. Using this model, high-gain high-selective radio frequency amplifiers based on BPFETs are successfully designed and demonstrated.
IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS
(2021)
Article
Physics, Applied
Wennan Hu, Yunlin Liu, Zhangcheng Huang, Jianguo Dong, Yue Wang, Weiao Chen, Zhe Sheng, Haoran Sun, Guangxi Hu, Chunxiao Cong, David Wei Zhang, Ye Lu, Peng Zhou, Zengxing Zhang
Summary: As the scaling of silicon-based integrated circuits becomes more challenging, alternative strategies are being developed, such as vertically stacked ambipolar complementary field-effect transistors composed of two-dimensional materials. These transistors exhibit switchable behavior and are used in a large voltage swing circuit for single photon avalanche detectors. This work could pave the way for future advancements in two-dimensional electronics and high-density integration circuits.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Chemistry, Physical
Qin Lu, Xiaoyang Li, Haifeng Chen, Yifan Jia, Tengfei Liu, Xiangtai Liu, Shaoqing Wang, Jiao Fu, Daming Chen, Jincheng Zhang, Yue Hao
Summary: This article demonstrates a mild method for thinning black phosphorus (BP) flakes. Slight ultraviolet-ozone (UVO) radiation followed by an argon plasma treatment is used to oxidize mechanically exfoliated BP flakes and remove previous ozone treatment residues. By controlling the thickness of BP flakes, low damage and efficient electronic devices are fabricated.
Article
Materials Science, Multidisciplinary
Yiming Sun, Wei Gao, Xueping Li, Congxin Xia, Hongyu Chen, Li Zhang, Dongxiang Luo, Weijun Fan, Nengjie Huo, Jingbo Li
Summary: van der Waals (vdW) heterostructures, formed by stacking different 2D materials, provide a promising platform for diverse physical phenomena and device functions. By utilizing gate voltage to modulate carrier concentration and transport in heterojunctions like MoTe2 and InSe, novel electronic and optoelectronic devices can be achieved. The MoTe2/InSe heterojunction exhibits anti-ambipolar transfer characteristics with a large work window and high peak-to-valley current ratio, showing potential for high-performance multifunctional optoelectronics.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Chemistry, Multidisciplinary
Minjeong Lee, Seungjae Yun, Dongil Ho, Taeshik Earmme, Assunta Marrocchi, Luigi Vaccaro, Choongik Kim
Summary: This study successfully demonstrated the use of sustainable green solvents in the fabrication of organic semiconductor devices, showing promising results in terms of device performance and transfer gain. The devices fabricated using green solvents exhibited typical ambipolar characteristics and decent transfer gain, indicating the potential application of green solvents in the manufacture of organic semiconductor devices.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2022)
Article
Chemistry, Physical
Xiangwei Qu, Jingrui Ma, Pai Liu, Kai Wang, Xiao Wei Sun
Summary: This work investigates the voltage sweep behavior of quantum dot light-emitting diodes (QLEDs). It is found that red QLEDs with ZnMgO electron transport layer (ETL) experience a drop in efficiency under consecutive voltage sweeps, while devices with ZnO ETL show an increase in efficiency. The analysis reveals that the efficiency drop in ZnMgO devices is related to hole leakage mediated by trap states on ZnMgO nanoparticles. Furthermore, the hole leakage also causes rapid lifetime degradation of ZnMgO devices.
Review
Chemistry, Multidisciplinary
Hua Zhou, Haitao Niu, Hongxia Wang, Tong Lin
Summary: Research on self-healing superwetting surfaces has made rapid progress in the past decade. They are regarded as an effective way to improve the durability and robustness of superwetting materials. However, challenges still exist in terms of specificity, external stimulation, and healing ability in different environments. This article provides a comprehensive review of self-healing superwetting surfaces, including fabrication strategies, material design principles, and healing properties. It also discusses the potential applications and future research directions.
Article
Engineering, Electrical & Electronic
Guoqing Wang, Yuan Zhou, Fang Zhao, Li-Yang Shao, Huanhuan Liu, Lipeng Sun, Shuming Jiao, Weizhi Wang, Rui Min, E. Du, Zhijun Yan, Chao Wang, Perry Ping Shum
Summary: Serial time-encoded amplified microscopy achieves ultrafast imaging speed in varied dynamic regimes, but faces challenges of high-throughput data and low-efficiency diffraction. In this study, we propose and confirm a compact and highly efficient optical imaging system based on compressive sensing and in-fiber grating. The system achieves a minimum data compression ratio of 5% and ultrafast imaging speeds of 10 Mfps and 1.25 Mfps, overcoming the big data issue and increasing energy efficiency.
IEEE PHOTONICS TECHNOLOGY LETTERS
(2023)
Article
Optics
Huayu Wei, Qi Wei, Fan Fang, Guohong Xiang, Bingyi Tong, Chenlin Wang, Baoqing Sun, Xian Zhao, Mingjie Li, Xiao Wei Sun, Yuan Gao
Summary: This study developed environmentally friendly CQDs with high emission efficiency, achieving optical gain and lasing in the blue spectral region. The alloyed CQDs showed lower threshold and fluence, suggesting potential applications.
LASER & PHOTONICS REVIEWS
(2023)
Article
Chemistry, Physical
Qingqian Wang, Hongmei Zhu, Wei Chen, Junjie Hao, Zhaojin Wang, Jun Tang, Yingguo Yang, Xiao Wei Sun, Dan Wu, Kai Wang
Summary: This study proposes an effective strategy to achieve high CPL activity in quantum dots by introducing 2D chiral perovskite as a chiral source, providing spin polarized carriers through the CISS effect. The as-synthesized QDs/CP composites exhibit dissymmetry factors (g(lum)) up to 9.06 x 10(-3). These findings provide a useful method to achieve CPL in QDs/2D chiral perovskite heterojunctions, which could be promising in spin-optoelectronics application.
Article
Chemistry, Multidisciplinary
Hui Zhang, Xiaohu Mi, Bowen Kang, Yunkai Wu, Tingting Zhang, Pai Liu, Xiaowei Sun, Zhenglong Zhang, Ning Liu, Hongxing Xu
Summary: Colloidal nanocrystals play a significant role in optoelectronic devices and their properties can be improved through ligand modification, which can enhance charge transport and emission characteristics in LEDs.
Article
Nanoscience & Nanotechnology
Hongmei Zhu, Qingqian Wang, Kun Sun, Wei Chen, Jun Tang, Junjie Hao, Zhaojin Wang, Jiayun Sun, Wallace C. H. Choy, Peter Muller-Buschbaum, Xiao Wei Sun, Dan Wu, Kai Wang
Summary: The chirality of 2D chiral perovskite films has been significantly enhanced by a solvent modulation strategy, leading to the formation of CPL-active materials. By creating chiral perovskite/quantum dot composites, an increase in the CPL intensity was observed, attributed to the generation and transportation of spin-polarized charge carriers as well as the enlarged lattice distortion of the chiral perovskite films achieved through solvent modulation. This approach provides an effective way to construct CPL-active materials.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Ronghuan Liu, Bihua Hu, Kai Wang, Baomin Xu, Xiao Wei Sun
Summary: Compared with polycrystalline thin films, perovskite single crystals without grain boundaries have better photovoltaic performance and stability. A green and low-cost airflow-assisted growth method has been developed for the synthesis of large quantities of high-quality and dispersed CsPbBr3 single-crystal wires under ambient conditions. This method shows great potential for optoelectronic applications and may facilitate the research of all-inorganic perovskite single crystals.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Optics
Jianxu Lan, Xiaodong Wen, Xiaowei Sun, Xixuan Liu, Yiwen Wang, Genliang Han
Summary: The study proposes a high-optomechanical-coupling-rate heterostructure with a gradient cavity, and calculates the optomechanical rates of the single mirror and hetero-optomechanical crystal nanobeam resonators. The results show that the heterostructure based on the utilization of two mirror regions achieves better confinement of the optical and mechanical modes. Additionally, it demonstrates a mechanical breathing mode at 9.75 GHz and an optical mode with a working wavelength of 1.17 μm, with an optomechanical coupling rate g(0) = 3.81 MHz between them, and an increased mechanical quality factor of 3.18 x 10(6).
Article
Physics, Applied
Guohong Xiang, Jingrui Ma, Xiangwei Qu, Kai Wang, Hoi Sing Kwok, Xiao Wei Sun
Summary: We present transparent quantum dot light-emitting diodes (QLEDs) with a current focusing structure. By depositing a SiO2 thin film to create the current focusing structure, we achieved significantly increased DC density and luminance, reaching values of over 8700 mA/cm(2) and 360,000 cd/m(2) respectively. The impact of SiO2 thickness and aperture width on emission spectra and current densities was investigated. The current focusing design demonstrates its effectiveness and potential application in other planar LED devices.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Analytical
Penglai Guo, Huanhuan Liu, Zhitai Zhou, Jie Hu, Yuntian Wang, Xiaoling Peng, Xun Yuan, Yiqing Shu, Yingfang Zhang, Hong Dang, Guizhen Xu, Aoyan Zhang, Chenlong Xue, Jiaqi Hu, Liyang Shao, Jinna Chen, Jianqing Li, Perry Ping Shum
Summary: A fiber speckle sensor based on a tapered multimode fiber has been developed to measure liquid analyte refractive index. The sensor enhances the refractive index sensitivity and provides a resolution of 5.84 x 10(-5) over a linear response range. The results demonstrate the potential of the speckle sensor in image-based ocean-sensing applications.
Article
Materials Science, Multidisciplinary
Guanding Mei, Xiangtian Xiao, Sajjad Ahmad, Hong Lin, Yangzhi Tan, Kai Wang, Xiao Wei Sun, Wallace C. H. Choy
Summary: This study demonstrates the importance of microcavity design for improving the light extraction efficiency of Perovskite light-emitting diodes (PeLEDs). The experiment shows that a high-efficiency horizontal dipole in the microcavity is the key to improving the efficiency.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Yifan Wang, Ziyu Hua, Jiachen Shi, Zongren Dai, Jiagang Wang, Liyang Shao, Yidong Tan
Summary: We propose and demonstrate a novel LiDAR system for 3-D imaging, combining LFI and FMCW. The system effectively enhances the amplitude of the generated beat signal, improving the sensitivity in weak-signal detection with low photon consumption. The system inherits the advantages of FMCW, measuring position and velocity simultaneously. Experimental results show valid distance and velocity measurement, and the system achieves high-quality 3-D imaging over 65 m away with a portable prototype.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Article
Physics, Applied
Wei He, Mingyuan Huang, Xiaowei Sun
Summary: This paper presents a numerical analysis of the topological valley kink states in a two-dimensional photonic crystal, focusing on both zigzag and armchair domain walls. By manipulating the triangular holes in a honeycomb structure, inequivalent valleys were created in the momentum space. The results showed that both the zigzag and armchair interfaces can support topologically protected valley kink states, providing potential applications for valley waveguides in integrated photonics.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Optics
Phil Surman, Changxiong Zheng, Chaojian Zhang, Zhenwei Yao, Xiaochuan Yang, Wenwei Xu, Xiao Wei Sun
Summary: The availability of high-resolution display panels has made glasses-free 3D displays a viable mainstream commercial product. This paper discusses the measurement of multiview 3D displays that use a slanted lenticular screen to control light directions. Understanding the image depth of field is important, in addition to the usual parameters. The aim of the paper is to describe general theory and procedure, and not the measurement of specific displays.
