Article
Chemistry, Multidisciplinary
Elena Titova, Dmitry Mylnikov, Mikhail Kashchenko, Ilya Safonov, Sergey Zhukov, Kirill Dzhikirba, Kostya S. Novoselov, Denis A. Bandurin, Georgy Alymov, Dmitry Svintsov
Summary: Graphene's high carrier mobility, compatibility with on-chip waveguides and transistors, and small heat capacitance make it a promising material for the detection of terahertz (THz) radiation. However, the weak reaction of graphene's physical properties to the detected radiation is due to the absence of a band gap. This study investigates the effect of electrically induced band gap on THz detection in graphene bilayer with split-gate p-n junction, and demonstrates that the induction of a band gap leads to increased current and voltage responsivities.
Article
Chemistry, Physical
Hai Yu, Miao Zhang, Jianguo Lv, Yanfen Wang, Lei Yang, Yanmei Liu, Qian Gao, Gang He, Zhaoqi Sun
Summary: The AgVO3/V2O5-TiO2 nanorod arrays were synthesized for pollutant removal and photoelectrochemical water splitting, achieving improved optical absorption and charge carrier separation. The modified TiO2 showed significantly enhanced photocurrent density, photodegradation efficiency, and oxygen evolution reaction performance compared to bare TiO2. The optimized interface of TiO2 by AgVO3 and V2O5 promoted the separation and transport of charge carriers, leading to superior performance in PEC experiments.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Jianjun Chen, Rongqiang Yin, Gongda Chen, Junyu Lang, Xiaoping Chen, Xuefeng Chu, Junhua Li
Summary: In this study, using V2O5-WO3/TiO2 catalyst, the efficient capture of gaseous Tl2O from combustion flue gas was investigated. Experimental and theoretical results showed that Tl2O can easily interact with TiO2 to form a p-n junction on the surface, making it an effective method to eliminate Tl emission.
GREEN ENERGY & ENVIRONMENT
(2023)
Article
Chemistry, Physical
Sikai Zhao, Yanbai Shen, Fulai Hao, Changke Kang, Baoyu Cui, Dezhou Wei, Fanli Meng
Summary: CuO-ZnO p-n junctions were constructed by precipitating CuO nanoparticles on the surface of ZnO nanowires, resulting in an enhancement of gas sensing performance, specifically in ethanol sensing. The distinct sensing behaviors of the sensors were discussed in relation to several factors and considerations.
APPLIED SURFACE SCIENCE
(2021)
Article
Nanoscience & Nanotechnology
Raphael Schuler, Federico Bianchini, Truls Norby, Helmer Fjellvag
Summary: A near-broken-gap alignment between p-type FeWO4 and n-type Fe2WO6 is reported, serving as a model pair for Ohmic direct junction thermoelectrics. Experimental data and computational modeling support the proposed formation of this near-broken-gap junction, providing insights into the unusual band overlap mechanism with Fe-3d character at the band edges.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Cheuk Kai Gary Kwok, Ying Wang, Xingyu Shu, Kin Man Yu
Summary: p-Type SnO can be oxidized into n-type SnO2, and we successfully fabricated an all-Tin Oxide transparent pn quasi-homojunction. Comparison with a p-SnO/n-ZnO heterojunction showed similar rectification behavior. XPS measurements revealed type II band offsets in both SnO2 and ZnO at the Gamma point, with respective valence band (conduction band) offsets of 2.8 eV (1.9 eV) and 2.4 eV (1.33 eV). The SnO/SnO2 p-n structure exhibited reasonable rectification with an ideality factor of -12.3, suggesting potential applications in transparent p-n junction devices.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Analytical
Amal George, A. Dhayal Raj, Qiaoqin Yang
Summary: Using the HFCVD technique, vanadium pentoxide (V2O5) thinfilms were deposited and their structural characteristics and gas sensing response were investigated. The thinfilms were found to be orthorhombic V2O5 with preferred orientation. Optimization of oxygen content and substrate to filament distance resulted in the formation of nanorod thinfilms. The nanorod thinfilms showed a sensing response of 1.557 and 1.721 towards 200 ppm ammonia and ethanol, with response and recovery times of 14 s and 26 s for ethanol, and 20 s and 38 s for ammonia, respectively.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Engineering, Electrical & Electronic
Vikas Patel, Basumati H. Patel
Summary: Photodetectors are widely studied opto-electronic devices that can convert optical signals into electrical current efficiently. A study on n-Zn1-xMgxO/p-Si heterojunction-based photodetectors for 390 nm light detection showed fast photoswitching action and high photoresponsivity.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Nanoscience & Nanotechnology
Fumikazu Murakami, Kazunori Serita, Iwao Kawayama, Hironaru Murakami, Kingshuk Bandopadhyay, Andrzej Materna, Augustine M. Urbas, Dorota A. Pawlak, Masayoshi Tonouchi
Summary: In this study, the carrier dynamics in a multilayered Bi2Te3-Te eutectic composite were investigated using laser terahertz emission microscopy. The results revealed the direction of the electric field between the Bi2Te3 and Te regions, indicating the carrier types and p-n junction formed at the interface. Additionally, a strong terahertz emission with parallel polarization to the interface was observed in the Te region, which can be explained by anisotropic transport of hot photocarriers. This research contributes to the exploration of eutectic heterostructures as functional materials and offers new possibilities for advanced thermoelectric and photovoltaic devices.
Article
Chemistry, Analytical
Xiaxia Xing, Lingling Du, Dongliang Feng, Chen Wang, Yingying Tian, Zhenxu Li, Huigang Liu, Dachi Yang
Summary: High concentration of gaseous ammonia is harmful to human organs, but low-concentration ammonia generated from human metabolism can be used as a biomarker for diagnosing kidney disease through exhaled breath. Wearable ammonia sensors integrated into clothing for real-time monitoring are highly desired. The development of twistable and tailorable nanocomposites textile for NH3 sensing shows enhanced response, high stability, and excellent interfering selectivity.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Materials Science, Ceramics
Fei-Hung Lin, Chia-Jyi Liu
Summary: Bi2Te3-based thermoelectric materials are the largest segment of sales in thermoelectric products. In this study, we propose an energy-efficient synthesis method conforming to the 6th principle for green chemistry to manufacture Bi2Te3-based thermoelectric materials. By studying the formation mechanism of n-Bi2Te3 nanocomposites synthesized at room temperature, we found that nanosized Bi and Te would first form before the growth of n-Bi2Te3. To shorten the growth period, we developed a procedure using nanosized precursors of Bi, Sb, and Te, followed by heat treatment. The resulting zT values were 1.27 at 400 K for p-(Bi, Sb)(2)Te-3-Te composite and zT = 1 for n-Bi2Te3 at 425 K.
CERAMICS INTERNATIONAL
(2023)
Article
Nanoscience & Nanotechnology
Kang Wang, Takashi Taniguchi, Kenji Watanabe, Jiamin Xue
Summary: Two-dimensional semiconductors show great potential as channel materials for field-effect transistors. Unlike traditional three-dimensional semiconductors, their surface with saturated chemical bonds maintains excellent properties even at monolayer thickness. However, the edges of these materials, which often go unnoticed, have important effects on devices. This study demonstrates that the edges of exfoliated and etched MoS2 are naturally p-type doped and can form p-n junctions with the bulk of the flake, which can be utilized to create rectifying or optoelectronic devices without the need for external doping.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Engineering, Electrical & Electronic
Minal A. Bhatt, Ashish R. Tanna
Summary: In this study, lithium-doped vanadium pentoxide samples were prepared using the solid-state synthesis method and their structural, compositional, and performance characteristics were investigated. It was found that lithium doping improves the electrical conductivity and energy storage capacity of vanadium pentoxide, with a decrease in the optical energy band.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Materials Science, Multidisciplinary
Dilip Kumar Meena, Rapaka S. C. Bose, A. M. Umarji, D. Arvindha Babu
Summary: In this study, polycrystalline Sb2Te3/Te nanocomposites were used and Poly Methyl Methacrylate (PMMA) was utilized to reduce the thermal conductivity of Sb2Te3 samples. It was found that the thermoelectric properties, composition, and microstructure of Sb2Te3/Te nanocomposites were influenced by the addition of PMMA. As the concentration of PMMA increased, a transition from p-type to n-type behavior was observed, possibly due to a decrease in charge carriers or an increase in resistance. It was also observed that the thermal conductivity of Sb2Te3/Te nanocomposites decreased with increasing PMMA content. This research opens up new possibilities for optimizing thermoelectric materials by reducing thermal conductivity through the use of polymers.
MATERIALS RESEARCH EXPRESS
(2023)
Article
Chemistry, Physical
Shikha Sakalley, Adhimoorthy Saravanan, Wei-Chun Cheng, Sheng-Chi Chen, Hui Sun, Bohr-Ran Huang, Ming-Han Liao
Summary: This study proposes a new p-n junction hybrid structure for self-powered ultraviolet photodetectors, which demonstrates enhanced photocurrent and photo-sensitivity. The device also exhibits fast photo response and recovery time, as well as significant repeatability for a long period of time.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Zhuoyin Peng, Zheng Sun, Zuoqiu Ning, Yueli Liu, Jianlin Chen, Wei Li, Wei Qiu, Jian Chen, Zhimin Liu
JOURNAL OF ALLOYS AND COMPOUNDS
(2020)
Article
Chemistry, Multidisciplinary
Aamir Saeed, Wen Chen, Abdul Hakim Shah, Yuyao Zhang, Ikhtisham Mehmood, Yueli Liu
Summary: The study focuses on the development of Cd0.2Zn0.8S@Ti3C2 nanocomposites prepared by the solvothermal method and their photocatalytic performance under visible light irradiation. Among them, the Cd0.2Zn0.8S@Ti3C2 nanocomposite with 5 wt% of Ti3C2 exhibits significant improvement in the CO2 reduction photocatalysis. The enhanced efficiency is attributed to efficient electron-hole separation and transfer at the interface between Cd0.2Zn0.8S and Ti3C2, which is confirmed by photoluminescence and electrochemical impedance spectroscopy. Furthermore, the nanocomposites show high cycling stability during CO2 photocatalytic reduction, and the study also discusses the photocatalytic mechanism.
JOURNAL OF CO2 UTILIZATION
(2021)
Article
Chemistry, Physical
Yueli Liu, Qitao Li, Wenchao Zhang, Zifan Yang, Sijie Zhao, Wen Chen
Summary: This study synthesized CsPb(I1-xBrx)(3) perovskite QDs by Br doping to improve phase stability and achieve a balance between the stability and power conversion efficiency of solar cells. The phase stability of CsPb(I1-xBrx)(3) QDs was greatly improved, while the band gap increased with the increase of Br doping content. CsPbI2.4Br0.6 QD-based perovskite solar cells showed a proper balance between high PCE and stability, approaching that of CsPbI3-based PSCs and retaining 87% of the efficiency after storage.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Physical
Yuyao Zhang, Wen Chen, Min Zhou, Guobin Miao, Yueli Liu
Summary: The study synthesized Ti3C2/CsPbBr3 quantum dot composites for photocatalytic reduction of CO2, showing excellent activity and stability, with a significantly higher CO generation rate. The construction of heterojunctions contributed to the accelerated separation of photoinduced holes and electrons, leading to improved photocatalytic performance.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Siyong Ou, Min Zhou, Wen Chen, Yuyao Zhang, Yueli Liu
Summary: Photocatalytic conversion of CO2 into value-added chemical fuels is an attractive approach to address global warming and the energy crisis. This study demonstrates the successful synthesis of a 1D/2D heterojunction COF-5/CoAl-LDH nanocomposite, which exhibits enhanced catalytic activity for CO2 reduction due to improved visible-light activity and the formation of a type II-2 heterojunction.
Article
Chemistry, Physical
Yuyao Zhang, Yu Tian, Wen Chen, Min Zhou, Siyong Ou, Yueli Liu
Summary: CO2 photoreduction is a promising strategy to tackle energy shortage and global warming. This research successfully improves the efficiency and selectivity of photocatalytic CO2 reduction by constructing an S-scheme heterojunction of bismuthene/CsPbBr3 quantum dots, providing insights for the design of heterojunction photocatalysts.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Multidisciplinary
Tingqiang Yang, Shuang Yang, Wei Jin, Yule Zhang, Nicolae Barsan, Anne Hemeryck, Swelm Wageh, Ahmed A. Al-Ghamdi, Yueli Liu, Jing Zhou, Wen Chen, Han Zhang
Summary: The (100) surface of alpha-MoO3 is found to be the active surface for amine sensing, and its surface chemistry has been well understood through density functional theory (DFT) calculations.
Article
Chemistry, Multidisciplinary
Aohan Mei, Wen Chen, Zifan Yang, Min Zhou, Wei Jin, Shuang Yang, Keqiang Chen, Yueli Liu
Summary: Recently, a flexible COF-5 film was synthesized for wearable detection of human body humidity. The adsorption and desorption of water molecule in COF layers cause a reversible deformation and create conductive paths through pi-pi stacking. The COF-5 films exhibited a resistance change of 4 orders of magnitude in the range of 11%-98% relative humidity, showing promising prospects in applications such as respiratory monitoring and non-contact switch.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Yueli Liu, Yifan Huang, Zifan Yang, Yipeng Li, Jie Xu, Huizhong Li, Wen Chen, Keqiang Chen
Summary: Lead-free Cs2AgBiI6 nanocrystals with a hexagonal phase were successfully synthesized using a hot-injection process, showing great potential in optoelectronics. These nanocrystals have a band gap of 2.29 eV, a high absorption coefficient (around 2.8 x 105 cm-1), and a symmetric and narrow photoluminescence peak (FWHM = 10 nm). Moreover, the hexagonal Cs2AgBiI6 nanocrystal films exhibit excellent heat, humidity, and illumination resistance in air. Solar cells based on these nanocrystals achieved a power conversion efficiency (PCE) of 0.076%, demonstrating their promising application in photovoltaics.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Keqiang Chen, Zixin Gu, Zhiqing Wang, Mengyu Guan, Xiu Tan, Wanqing Xu, Xinyu Ji, Weiqi Lu, Yueli Liu, Guogang Li
Summary: Recently, the polarization effect has gained much attention for its role in improving stability and charge transfer efficiency in metal-halide perovskites. However, achieving the polarization effect in CsPbX3 NCs remains a challenge. In this study, small radius metal ions (such as Mg2+, Li+, Ni2+, etc.) were introduced on the surface of CsPbX3 NCs, promoting the generation of electric dipoles and surface polarization. This surface polarization effect led to enhanced surface ligand bonding, reduced surface defects, near unity photoluminescence quantum yields, and improved stability. Additionally, the introduction of hydroiodic acid enabled the in situ formation of tert-butyl iodide (TBI), facilitating the synthesis of pure iodine-based CsPbI3 NCs with high photoluminescence quantum yield and stability under ambient conditions.
Article
Chemistry, Physical
Hange Wang, Wen Chen, Wei Jin, Yueli Liu
Summary: Sn-doped modified CoAl-LDH carriers synthesized by hydrothermal method achieve 100% NO conversion at a wide temperature range, demonstrating excellent resistance to SO2 pollution and low-temperature performance compared to other catalysts.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Physical
Tangxi Chen, Min Zhou, Wen Chen, Yuyao Zhang, Siyong Ou, Yueli Liu
Summary: Lead-free Cs2AgInCl6 perovskite quantum dots (CAIC QDs) and CAIC QDs@Ag composites were synthesized to improve the efficiency of CO2 photoreduction. By adjusting the ligand density, fast electron transport and effective carrier separation were achieved to enhance the photocatalysis reaction efficiency.
SUSTAINABLE ENERGY & FUELS
(2021)
Article
Chemistry, Multidisciplinary
Han Jin, Junkan Yu, Shujing Lin, Shan Gao, Hao Yang, Hossam Haick, Changzhou Hua, Shengwei Deng, Tingqiang Yang, Yueli Liu, Wenfeng Shen, Xin Zhang, Xiaowei Zhang, Shan Shan, Tao Ren, Liwei Wang, Waifung Cheung, Wanlung Kam, Jianmin Miao, Di Chen, Daxiang Cui
Review
Materials Science, Multidisciplinary
Tingqiang Yang, Yueli Liu, Huide Wang, Yanhong Duo, Bin Zhang, Yanqi Ge, Han Zhang, Wen Chen
JOURNAL OF MATERIALS CHEMISTRY C
(2020)
Article
Chemistry, Physical
Yueli Liu, Xizhu Zhao, Zifan Yang, Qitao Li, Wei Wei, Bin Hu, Wen Chen
ACS APPLIED ENERGY MATERIALS
(2020)
Article
Engineering, Electrical & Electronic
Nishi Mehak, Bindu Rani, Aadil Fayaz Wani, Shakeel Ahmad Khandy, Ajay Singh Verma, Atif Mossad Ali, M. A. Sayed, Shobhna Dhiman, Kulwinder Kaur
Summary: In this study, the electronic, structural, and thermoelectric properties of newly designed layered rare-earth metal germanide halides were investigated. The materials showed promising thermoelectric performance, making them suitable candidates for energy harvesting in thermoelectric applications.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2024)
Article
Engineering, Electrical & Electronic
Devidas I. Halge, Vijaykiran N. Narwade, Nabeel M. S. Kaawash, Pooja M. Khanzode, Sohel J. Shaikh, Jagdish W. Dadge, Prashant S. Alegaonkar, Rajeshkumar S. Hyam, Kashinath A. Bogle
Summary: This study presents the design and fabrication of a high-performance blue light photodetector using an n-type cadmium sulfide (CdS) thin film and a p-type polyaniline (PANI). The photodetector demonstrates exceptional performance characteristics, including high responsivity, detectivity, and sensitivity, along with rapid response time and rectification behavior. The research represents a significant advancement in the field of high-performance photodetectors.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2024)
Article
Engineering, Electrical & Electronic
Da Hu, Jiabin Lu, Qiusheng Yan, Yingrong Luo, Ziyuan Luo
Summary: This study introduces a chemical mechanical polishing technique based on metal electrochemical corrosion for single-crystal SiC to address the environmental pollution caused by the polishing solution in chemical mechanical polishing. Wear experiments were conducted to investigate the wear properties of SiC C-surface under different grinding ball materials and solutions. The proposed mechanism of material removal in single-crystal SiC via metal electrochemical corrosion was discussed.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2024)
Article
Engineering, Electrical & Electronic
Lifang Mei, Long Lin, Dongbing Yan, Yu Liang, Yu Wu, Shuixuan Chen
Summary: This paper investigates the removal of CuO particles from silicon wafer surfaces using a picosecond laser. Numerical calculations and experimental research were conducted, and a thermal-stress coupled finite element model was established. The results show that as the laser energy density increases, the removal rate of CuO particles initially increases and then decreases, while the roughness of the silicon substrate decreases and then increases.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2024)
Article
Engineering, Electrical & Electronic
Michihiro Yamada, Shuhei Kusumoto, Atsuya Yamada, Kentarou Sawano, Kohei Hamaya
Summary: In this study, we demonstrated the low-temperature growth of a Ge layer on a Co-based Heusler alloy via Sn doping, which improved the magnetic properties and spin signal.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2024)
Article
Engineering, Electrical & Electronic
Xiang-Long Wei, Bao-Feng Shan, Zong-Yan Zhao
Summary: This study synthesized and characterized a CuAlO2/CuGaO2 heterostructure and evaluated its photocatalytic performance. The heterostructure exhibited superior performance compared to individual CuAlO2 and CuGaO2 photocatalysts, with increased carrier concentration, enhanced redox capabilities, superior electrochemical stability, and reduced interfacial resistance. Photocatalytic experiments demonstrated the remarkable oxidation potential and notable reduction activity of the heterostructure, outperforming CuAlO2 and CuGaO2 in degradation rates and hydrogen production rates, respectively. These findings highlight the superior performance and broad applicability of the CuAlO2/CuGaO2 heterostructure in various photocatalytic reactions.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2024)
Article
Engineering, Electrical & Electronic
Micka Bah, Daniel Alquier, Marie Lesecq, Nicolas Defrance, Damien Valente, Thi Huong Ngo, Eric Frayssinet, Marc Portail, Jean-Claude De Jaeger, Yvon Cordier
Summary: This study investigates the AlN nucleation layer issue in GaN high frequency telecommunication and power switching systems fabricated after heteroepitaxy on Silicon or Silicon Carbide. It is shown that using 3C-SiC as an intermediate layer can significantly decrease RF propagation losses. Measurements and analyses demonstrate that dopant diffusion into the 3C-SiC pseudo-substrate is confined beneath the interface, and a slightly conductive zone is present beneath the AlN/3C-SiC interface, explaining the low propagation losses obtained for the devices. This work highlights the importance and efficiency of the 3C-SiC intermediate layer as a pseudo-substrate.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2024)
Article
Engineering, Electrical & Electronic
Shuang Wang, Lijun Wu, Zhiqing Wang, Ziyue Qian
Summary: The geometric structure and electrical properties of zigzag and armchair DWSiNT perfect tubes with different Stone-Wales defects were simulated using the SCC-DFTB method. It was found that the atomic arrangement, stability, energy gap, and charge distribution strongly depend on the type of tube. The effects of strong and weak electric fields on the tubes were also investigated, showing different impact on stability and energy gap. These findings have implications for future experimental studies.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2024)
Article
Engineering, Electrical & Electronic
Nanda Kumar Reddy Nallabala, Sunil Singh Kushvaha, Sambasivam Sangaraju, Venkata Krishnaiah Kummara
Summary: This study focuses on the preparation and performance of MIS-type high-k dielectric oxide-based UV photodetectors. The researchers found that the Au/Ta2O5/GaN devices prepared on Ta2O5/GaN heterojunction with post-annealing exhibited improved photoresponsivity, EQE, and rise/fall times. This improvement is attributed to the optimized band configuration of the Ta2O5/GaN heterostructure and the effect of post-annealing on photogenerated charge carriers.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2024)
Article
Engineering, Electrical & Electronic
Jean-Francois Michaud, Marc Portail, Daniel Alquier, Dominique Certon, Isabelle Dufour
Summary: This paper reviews the use of MEMS devices without sensitive layers in gas detection applications. These devices can measure a physical property of the gas to determine its concentration, and have the advantages of generality and high detection limits.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2024)
Article
Engineering, Electrical & Electronic
Kanyu Yang, Chaojie Shi, Ruizhao Tian, Haoyue Deng, Jie He, Yangyang Qi, Zhengchun Yang, Jinshi Zhao, Zhen Fan, Jun Liu
Summary: This study investigates the electrical and synaptic properties of Ag/TiO2 nanorod/FTO-based RRAM devices, focusing on the impact of different seed layer thicknesses on nanorod thickness and RRAM performance. The devices show remarkable achievements in terms of endurance, self-compliance, and resistance switching ratio. The switching mechanism is attributed to space-charge-limited conduction resulting from electron trapping in oxygen vacancy traps. The devices also maintain stable synaptic properties even after undergoing multiple cycles of long-term potentiation and depression.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2024)
Article
Engineering, Electrical & Electronic
Karthickraj Muthuramalingam, Wei-Chih Wang
Summary: This study presents a non-destructive approach using terahertz time-domain spectroscopy (THz-TDS) to estimate the electrical properties of semi-insulating compound semiconductors. The study successfully measures the resistivity and carrier concentration of semi-insulating Silicon Carbide (SiC) and Indium Phosphide (InP) wafers using THz-TDS in transmission mode. The simplified Drude model and the Nelder-Mead algorithm are employed to estimate the electrical properties, and the results are in accordance with the manufacturer specifications. The feasibility of non-destructive mapping of the electrical properties is demonstrated, offering a promising tomographic inspection approach for online monitoring.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2024)
Article
Engineering, Electrical & Electronic
Pengfei Wei, Rui Tong, Xiaofeng Liu, Yao Wei, Yongan Zhang, Xu Liu, Jian Dai, Haipeng Yin, Dongming Liu
Summary: This study investigates the influence of SiNx and SiOxNy as rear-side passivation films on the performance of PERC+ cells. SiNx film is found to have better passivation performance and resistance to aluminum paste erosion, while SiOxNy film exhibits better optical performance. By designing multi-layer SiNx/SiOxNy/SiNx stacks, the cells' efficiency and bifaciality are significantly improved.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2024)
Article
Engineering, Electrical & Electronic
Shuangting Ruan, Xiaolan Li, Wen Cui, Zhihui Zhang, Zhihui Xu, Huanqi Cao, Shougen Yin, Shishuai Sun
Summary: Integrating photosensitive electrode materials can effectively improve the low temperature tolerance and enhance energy density and power density. The surface morphology reconstruction technique can increase the active surface area and improve electrolyte contact, leading to higher specific capacity. Additionally, the electrodes demonstrate excellent photoelectric and photothermal conversion abilities, allowing the supercapacitor to maintain high energy density even at low temperatures.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2024)
Review
Engineering, Electrical & Electronic
Ashmalina Rahman, James Robert Jennings, Mohammad Mansoob Khan
Summary: This review provides a comprehensive overview of the synthesis and applications of nanostructured CuInS2 in photocatalytic applications. Various strategies, including the introduction of dopants, surface decoration, and heterojunction formation, have been summarized to improve the photocatalytic performance of CuInS2. However, scientific challenges such as the high carrier recombination rate limit the broad application of CuInS2.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2024)
