Article
Multidisciplinary Sciences
Ting Jiang, Yiru Wang, Yingshuang Zheng, Le Wang, Xiang He, Liqiang Li, Yunfeng Deng, Huanli Dong, Hongkun Tian, Yanhou Geng, Linghai Xie, Yong Lei, Haifeng Ling, Deyang Ji, Wenping Hu
Summary: This study presents a UV-ultrasensitive neuromorphic vision sensor (NeuVS) that can detect and perceive ultraviolet light using organic phototransistors (OPTs). The NeuVS exhibits good image sensing and memorization capability, and its wavelength-selective response and multi-level optical memory properties are utilized to construct an artificial neural network for extracting and identifying invisible UV information.
NATURE COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Zhenfeng Li, Zihan Li, Zhiyuan Shi, Pengyu Zhu, Zixu Wang, Jia Zhang, Yang Li, Peng He, Shuye Zhang
Summary: UV detectors have significant applications in military, natural disaster warning, biomedical detection, etc. This paper focuses on improving the performance of ZnO-based UV detectors by modifying ZnO thin films. By controlling the oxygen vacancy defects and improving the crystallinity of ZnO films through heat treatment, the detectors achieved the best comprehensive performance.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Nanoscience & Nanotechnology
Seonggwang Yoo, Da Som Kim, Woong-Ki Hong, Jung Il Yoo, Fu Huang, Heung Cho Ko, Jung Hee Park, Jongwon Yoon
Summary: The combination of IGZO photo-TFTs with biomaterials enhances UV photoresponse characteristics and improves UV-A absorption while suppressing persistent photoconductivity. The biomaterial/IGZO interface plays a crucial role in achieving fast, repeatable UV monitoring.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Materials Science, Multidisciplinary
Jun Hyung Jeong, Sungho Park, Byung Jun Kim, Su Been Heo, Tae Yeon Kim, Jae Seung Shin, Jong Hun Yu, Jin Hyun Ma, Min Gye Kim, Seong Jun Kang
Summary: By doping ZnO with Li, controlling the amount of oxygen vacancies, the photoresponsivity of oxide semiconductors to visible light is enhanced. The Li-doped ZnO TFTs exhibit improved electrical behavior, with high field-effect mobility and high on/off ratio.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Chemistry, Multidisciplinary
Xingwei Ding, Bing Yang, Haiyang Xu, Jie Qi, Xifeng Li, Jianhua Zhang
Summary: UV treatment at room temperature was used to prepare high-quality IZO thin films for TFT fabrication. The structure of IZO thin films was gradually rearranged after UV treatment, resulting in good M-O-M network formation and bonds.
Article
Engineering, Electrical & Electronic
Zexuan Guo, Man Zhao, Dayong Jiang, Jing Zhang, Chunyan Xu
Summary: This article discusses novel sandwich-structured surface plasmon ultraviolet photodetectors based on ZnO thin films, with an investigation into the influence of different metallic layers on device properties. The study reveals that the prepared UV-PDs exhibit low dark noise current and high responsivity in the rear metallic electrode mode.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Physical
Xue Chen, Jiaxian Wan, Hao Wu, Chang Liu
Summary: Passivation of oxide-based thin film transistors still poses a challenge due to the need for thermal treatments, which can impact the transistor characteristics. By reducing the growth temperatures of passivation layers, the performance of TFTs can be maintained within an acceptable range. Among all devices, TFTs with Al2O3 PVLs deposited at 100 degrees C using H2O as oxidant exhibit high mobility, proper threshold voltage, low subthreshold swing, and excellent stability.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Hongseok Oh, Shadi A. Dayeh
Summary: Highly sensitive force sensors of piezoelectric zinc oxide dual-gate thin film transistors are reported, along with an analytical model that elucidates the physical origins of their response. The dual-gate TFTs exhibited static and transient current changes under external forces, with an analytical model accurately portraying the piezoelectric response that modulates the energy-band edges and current-voltage characteristics. Demonstrating a field-tunable force response in single TFT, this work sheds light on the correlation between material properties and the force response in piezoelectric TFTs.
ADVANCED MATERIALS TECHNOLOGIES
(2021)
Article
Physics, Applied
Ablat Abliz, Xiongxiong Xue, Xingqiang Liu, Guoli Li, Liming Tang
Summary: The study found that N/H co-doping can significantly enhance the electrical performance of ZnO thin-film transistors, mainly due to the reduction of defect concentration and interface trap density after co-doping.
APPLIED PHYSICS LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Dan Kuang, Adrian H. Kitai, Zhinong Yu
Summary: Zinc Oxide (ZnO) and Silicon Carbide (SiC) are highly promising semiconductors with wide bandgaps, and their heterostructures have potential for the next generation of optoelectronics technologies. The optoelectric properties of ZnO nanowires and n-type 4H-SiC heterojunction UV photodetectors were studied and compared for different SiC doping concentrations. A high-performance UV photodetector based on a ZnO/4H-SiC heterojunction with a high SiC doping concentration of 10(18)/cm(3) was successfully fabricated, showing improved optoelectronic performance compared to other devices. The heterojunction structure and energy band bending in the ZnO/SiC interface facilitate spatial separation of electron-hole pairs and efficient transport of charge carriers, enhancing photocurrent and enabling quick time response.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Chemistry, Analytical
Minho Yoon
Summary: This study investigates the effects of disorder on the subthreshold characteristics of atomically deposited ZnO thin-film transistors (TFTs). It is found that the charge-transport characteristics of the disordered TFTs are severely affected by localized trap states, resulting in gate-voltage-dependent degradation. By considering the disorderedness factors as gate-dependent power laws, a subthreshold current-voltage relationship is derived for disordered semiconductors. The disorderedness parameters obtained from this relationship are consistent with those obtained by the gm/Ids method.
Article
Multidisciplinary Sciences
Ning Li, Yanlian Lei, Yanqin Miao, Furong Zhu
Summary: By applying a bulk heterojunction (BHJ) channel, the electrical ideality and near-infrared (NIR) photoresponse in organic phototransistors (OPTs) can be simultaneously increased. The BHJ channel traps injected electrons and improves hole transporting, while also reducing contact resistance. Additionally, the BHJ channel enhances exciton dissociation and significantly improves the responsivity of the OPTs. These findings are crucial for the development of high-performing NIR OPTs.
Article
Chemistry, Physical
Shuang Qiao, Haijing Sun, Jihong Liu, Guangsheng Fu, Shufang Wang
Summary: By investigating the photoresponse and pyro-phototronic response of ZnO/Si and ZnO/PEDOT:PSS heterojunctions, it is found that the nanowire length strongly affects the photoresponse, and the optimal length and performance differ significantly between the two heterostructures. Furthermore, the introduction of the pyro-phototronic effect greatly improves the photoresponse and enables an ultra-broadband response range.
Article
Chemistry, Physical
Dewu Yue, Songbo Guo, Shun Han, Peijiang Cao, Yuxiang Zeng, Wangying Xu, Ming Fang, Wenjun Liu, Deliang Zhu, Youming Lu, Yongteng Qian
Summary: By systematically optimizing the synthesis conditions, high performance MgZnO/ZnO dual-active-layer TFTs were fabricated. The optimized TFTs exhibited high mobility and high Ion/off, making them suitable for high-performance electronic devices.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Polymer Science
Xuanzhen Zhang, Yunhui Feng, Fangbao Fu, Huan Wang
Summary: In this work, a highly sensitive UV photodetector with a unique sandwich structure was constructed. It exhibited excellent photocurrent responsiveness and photoconductivity, attributed to the large specific surface area of ZnO nanosheets and the p-n junction formed between P-type PANI nano-porous film and N-type ZnO nanosheets.
Article
Nanoscience & Nanotechnology
Spyridon G. Kosionis, Emmanuel Paspalakis
Summary: In this study, we theoretically investigate the pump-probe response and the four-wave mixing spectrum in a hybrid system composed of a semiconductor quantum dot and a spherical metal nanoparticle. Using a density matrix methodology, we calculate the absorption/gain, dispersion, and four-wave mixing spectra, and analyze their spectral characteristics. We also apply the metastate theory and the dressed-state picture to predict the positions of the spectral resonances.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2024)
Article
Nanoscience & Nanotechnology
L. S. Lima
Summary: This study investigates quantum correlation and entanglement in the non-Hermitian Hubbard model. By analyzing quantum entanglement measures such as entanglement negativity and entropy, the effect of non-Hermitian imaginary hopping on the system is explored. It is found that in the large... limit, the non-Hermiticity reverses the behavior of the ground state energy and low-lying excitations.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2024)
Article
Nanoscience & Nanotechnology
Nam-Chol Ri, Chung-Sim Kim, Sang-Ryol Ri, Su-Il Ri
Summary: By decreasing the lattice thermal conductivity of GNR through chemical derivation and strain, enhancing the thermoelectric properties of the electron part can be an important method to approach PGEC. This paper proposes synthesized hybrid systems formed by chemical derivation in the middle parts of b-AGNRs, and investigates the band structures and thermoelectric properties of the electron part under different strains. The results show that the band gaps of the systems significantly increase under different strains.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2024)
Article
Nanoscience & Nanotechnology
Le T. T. Phuong, Tran Cong Phong
Summary: This study investigates the effects of gas molecules adsorbed on /312-borophene on its electronic heat capacity and thermal Schottky anomaly. The results show that the adsorbed gas molecules have different impacts on the electronic heat capacity, leading to the generation of various new energy levels.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2024)
Article
Nanoscience & Nanotechnology
Tianyan Jiang, Jie Fang, Wentao Zhang, Maoqiang Bi, Xi Chen, Junsheng Chen
Summary: This paper investigates the adsorption and sensing properties of transition metal-doped WSSe gas-sensitive devices towards H2, CO, and CO2 gases related to thermal runaway in Li-ion batteries using density functional theory. The results show that Ti, Mn, and Mo dopants preferentially bind to the S-surface of the WSSe monolayer, and all three monolayers exhibit significantly improved sensing characteristics, with chemisorption towards CO. Band structure analysis suggests that the Ti-WSSe monolayer has the potential to be used as a resistive CO detection sensor. Recovery time calculations indicate the reuse capabilities of the gas-sensitive devices. Mn-WSSe monolayer shows potential for H2 detection, while Mo-WSSe monolayer is more suitable for CO2 detection. This work lays the foundation for potential gas-sensitive applications of WSSe monolayer in thermal runaway scenarios, advancing research in gas sensing domains.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2024)
Article
Nanoscience & Nanotechnology
Olga A. Alekseeva, Aleksandr A. Naberezhnov, Ekaterina Yu. Koroleva, Aleksandr Fokin
Summary: This study investigates the temperature dependence of crystal structure and dielectric response in a nanocomposite material containing porous glasses and embedded sodium nitrate. The results reveal a crossover point in the temperature dependence of the order parameter of the structural transition in sodium nitrate nanoparticles, as well as a decrease in activation energy of sodium ions hopping conductivity during heating.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2024)
Article
Nanoscience & Nanotechnology
Lijun Cheng, Fang Cheng
Summary: This paper investigates the effects of electric and magnetic fields on the Goos-Hanchen (GH) shift in a semi-Dirac system. The results show that the magnitude and direction of the GH shift depend on various factors such as incidence angle, electric barrier height and width, and magnetic field. It is observed that there is a saltus step in GH shifts at the critical magnetic field, which decreases with increased potential barrier thickness. Additionally, the GH shift can be significantly enhanced by applying an electric field in the III region. These findings are important for the development of semi-Dirac based electronic devices.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2024)
Article
Nanoscience & Nanotechnology
Alexander K. Fedotov, Uladzislaw E. Gumiennik, Julia A. Fedotova, Janusz Przewoznik, Czeslaw Kapusta
Summary: The study conducted an improved analysis of carrier transport in single-layer graphene and hybrid structures, showing the coexistence of negative and positive contributions in magnetoresistive effect. Various models were used to analyze the dependences on temperature and magnetic field, providing insights into the behavior of electrical resistance in the structures.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2024)
Article
Nanoscience & Nanotechnology
Xuhui Peng, Tao Chen, Ruotong Chen, Shizheng Chen, Qing Zhao, Xiaoping Huang
Summary: In this study, a novel method was proposed to design and fabricate optoelectronic devices with highly precise controlled photorefractive liquid crystal structures. By utilizing quantum dots and electric tuning, a regular periodic grating was formed in a quantum dot-doped liquid crystal volume illuminated by a laser standing evanescent wave field. The obtained optical diffraction pattern showed equally spaced light spots and high diffraction efficiency, indicating a significant change in the refractive index of the nanostructured device.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2024)
Article
Nanoscience & Nanotechnology
Kai-Hua Yang, Xiao-Hui Liang, Huai-Yu Wang, Yi-Fan Wu, Qian-Qian Yang
Summary: In this work, a theoretical model is proposed to achieve the controllability of quantum interference and decoherence. The effects of intralead Coulomb interaction, interdot tunneling, and electron-phonon interactions on differential conductance are investigated. The results show the appearance of destructive interference, Fano interference, and negative differential conductance in strong dot-lead tunneling regions, while a characteristic pattern of positive and negative differential conductances appears in the weak dot-lead tunneling regime.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2024)
Article
Nanoscience & Nanotechnology
Xueying Wang, Qian Ma, Qi Zhang, Yi Wang, Lingyu Li, Dongheng Zhao, Zhiqiang Liu
Summary: Porous double-channel alpha-Fe2O3/SnO2 heterostructures with tunable surface/interface transport mechanism were successfully fabricated by electrospinning and calcination. These heterostructures exhibited a large specific surface area, providing more active sites and enhanced adsorption capacity. The optimal composite materials showed the highest response value and the fastest response/recovery times to DMF, along with good cycling performance, long-term stability, and high gas selectivity.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2024)
Article
Nanoscience & Nanotechnology
Donglin Guo, Zhengmeng Xu, Chunhong Li, Kejian Li, Bin Shao, Xianfu Luo, Jianchun Sun, Yilong Ma
Summary: Using full electron-phonon interactions and the Boltzmann transport equation, this study investigates the phonon scattering channel and electrical properties of graphene under anharmonic phonon renormalization (APRN). The results show that the APRN reduces the phonon frequency and three-phonon phase space with increasing temperature, affecting the acoustic branch more than the optical branch. The thermal conductivity of graphene decreases after considering three- and four-phonon scattering, and the primary scattering channels are identified. Furthermore, the APRN increases the strength of electron-phonon coupling and leads to an increase in n-type electric resistance at room temperature.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2024)
Article
Nanoscience & Nanotechnology
Hongping Zhao, Man Zhao, Dayong Jiang
Summary: The study proposes a broadband photodetector with high response, high sensitivity, and controllable band by integrating quantum dots and highly conductive materials. The PD composed of ZnO film/PbS quantum dots heterostructure shows excellent photoresponse performance in the UV-Vis-NIR range, with the peak responsivity increased by 550%, accompanied by significant red shift, faster response, and recovery speed. By using RF magnetron sputtering to prepare ultra-thin ZnO film, the impact of PbS quantum dots on the photoelectric properties of ZnO film is comprehensively and systematically discussed.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2024)
Article
Nanoscience & Nanotechnology
Ye Xuan Meng, Liwei Jiang, Yisong Zheng
Summary: Manipulating magnetism by electrical means is an effective method for realizing ultra-low power spintronic-integrated circuits. In this study, it is demonstrated that the two-dimensional semiconductor material InO monolayer can be tuned to a half-metallic state by applying a gate voltage, providing theoretical guidance for adjusting two-dimensional magnetic semiconductors.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2024)
Article
Nanoscience & Nanotechnology
Anusha Kachu, Aalu Boda
Summary: In this research, we investigated the impact of confinement nature on a neutral hydrogenic donor impurity in a quantum dot. The study demonstrated intriguing behavior in response to changes in potential shape, quantum dot parameters, and spin-orbit coupling strengths. The findings provide valuable insights into the fundamental physics of quantum dots and impurities and can aid in the design and optimization of QD-based technologies.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2024)