您的检索：
学者姓名：张永哲
精炼检索结果：
年份
成果类型
收录类型
来源
综合
合作者
语言
清除所有精炼条件
摘要 ：
The polarization singularities in momentum space, rather than in real space, are capturing interest for active singular optics with exotic light scattering and various topological phenomena, which have potential applications in vortex nano-lasers, valley exciton emission, and others. Here, we propose to magnetically control the polarization singularities in momentum space in the photonic crystal slabs with inversion spatial symmetry (P symmetry). A pair of C points (circular polarization points) with the same topological charge is spawned from a V point (polarization vortex center), and they can be dynamically shifted in momentum space with the variation of the magnetic field. Moreover, the coupling between transverse electric (TE) and transverse magnetic (TM) modes induced by the magnetic field gives rise to a hybrid mode, which can close certain leaky channels to achieve an accidentalVpoint. Such active manipulation of polarization singularities with magnetic field is promised for various applications in light-matter interactions and reveals novel phenomena and physics in singular optics and topological photonics. (C) 2022 Optica Publishing Group
引用：
复制并粘贴一种已设定好的引用格式，或利用其中一个链接导入到文献管理软件中。
| GB/T 7714 | Zhao, Chen , Dong, Shaohua , Zhang, Qing et al. Magnetic modulation of topological polarization singularities in momentum space [J]. | OPTICS LETTERS , 2022 , 47 (11) : 2754-2757 . |
| MLA | Zhao, Chen et al. "Magnetic modulation of topological polarization singularities in momentum space" . | OPTICS LETTERS 47 . 11 (2022) : 2754-2757 . |
| APA | Zhao, Chen , Dong, Shaohua , Zhang, Qing , Zeng, Yixuan , Hu, Guangwei , Zhang, Yongzhe . Magnetic modulation of topological polarization singularities in momentum space . | OPTICS LETTERS , 2022 , 47 (11) , 2754-2757 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
Lead sulfide colloidal quantum dots (PbS CQDs) have shown great potential in photodetectors owing to their promising optical properties, especially their strong and tunable absorption. However, the limitation of the specific detectivity (D*) in CQD near-infrared (NIR) photodetectors remains unknown due to the ambiguous noise analysis. Therefore, a dear understanding of the noise current is critically demanded. Here, we elucidate that the noise current is the predominant factor limiting D*, and the noise is highly dependent on the trap densities in halide-passivated PbS films and the carriers injected from the Schottky contact (EDT-passivated PbS films/metal). It is found that the thickness of CQDs is proportional to their interface trap density, while it is inversely proportional to their minimal bulk trap density. A balance point can be reached at a certain thickness (136 nm) to minimize the trap density, giving rise to the improvement of D*. Utilizing thicker PbS-EDT films broadens the width of the tunneling barrier and thereby reduces the carrier injection, contributing to a further enhancement of D*. The limiting factors of D* determined in this work not only explain the physical mechanism of the influence on detection sensitivity but also give guidance to the design of high-performance CQD photodetectors.
关键词 ：
noise current noise current charge carrier injection charge carrier injection rap density rap density colloidal quantum dots colloidal quantum dots near-infrared imaging specific detectivity near-infrared imaging specific detectivity
引用：
复制并粘贴一种已设定好的引用格式，或利用其中一个链接导入到文献管理软件中。
| GB/T 7714 | Gong, Wei , Wang, Peng , Deng, Wenjie et al. Limiting Factors of Detectivity in Near-Infrared Colloidal Quantum Dot Photodetectors [J]. | ACS APPLIED MATERIALS & INTERFACES , 2022 , 14 (22) : 25812-25823 . |
| MLA | Gong, Wei et al. "Limiting Factors of Detectivity in Near-Infrared Colloidal Quantum Dot Photodetectors" . | ACS APPLIED MATERIALS & INTERFACES 14 . 22 (2022) : 25812-25823 . |
| APA | Gong, Wei , Wang, Peng , Deng, Wenjie , Zhang, Xiaobo , An, Boxing , Li, Jingjie et al. Limiting Factors of Detectivity in Near-Infrared Colloidal Quantum Dot Photodetectors . | ACS APPLIED MATERIALS & INTERFACES , 2022 , 14 (22) , 25812-25823 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
The ultrathin feature of two-dimensional (2D) transition metal dichalcogenides (TMDs) has brought special performance in electronic and optoelectronic fields. When vertical and lateral heterojunctions are made using different TMD combinations, the original properties of premier TMDs can be optimized. Especially for lateral heterojunctions, their sharp interface signifies a narrow space charge region, leading to a strong in-plane built-in electric field, which may contribute to high separation efficiency of photogenerated carriers, good rectification behavior, self-powered photoelectric device construction, etc. However, due to the poor controllability over the synthesis process, obtaining a clean and sharp interface of the lateral heterojunction is still a challenge. Herein, we propose a simple chemical vapor deposition (CVD) method, which can effectively separate the growth process of different TMDs, thus resulting in good regulation of the composition change at the junction region. By this method, MoS2-WS2 lateral heterojunctions with sharp interfaces have been obtained with good rectification characteristics, similar to 105 on/off ratio, 1874% external quantum efficiency, and similar to 120 ms photoresponse speed, exhibiting a better photoelectric performance than that of the lateral ones with graded junctions.
引用：
复制并粘贴一种已设定好的引用格式，或利用其中一个链接导入到文献管理软件中。
| GB/T 7714 | Li, Jingtao , Ma, Yang , Li, Yufo et al. Interface Influence on the Photoelectric Performance of Transition Metal Dichalcogenide Lateral Heterojunctions [J]. | ACS OMEGA , 2022 . |
| MLA | Li, Jingtao et al. "Interface Influence on the Photoelectric Performance of Transition Metal Dichalcogenide Lateral Heterojunctions" . | ACS OMEGA (2022) . |
| APA | Li, Jingtao , Ma, Yang , Li, Yufo , Li, Shao-Sian , An, Boxing , Li, Jingjie et al. Interface Influence on the Photoelectric Performance of Transition Metal Dichalcogenide Lateral Heterojunctions . | ACS OMEGA , 2022 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
高校基层党组织广泛植根于高校教育和教学科研的最前沿,与广大高校师生有着最为紧密的联系,基层党建工作开展得是否入脑入心对高校落实好“培养什么人、怎样培养人、为谁培养人”起着重要的作用.结合现有高校教师党支郎书记选配现状及面临的挑战,总结了“双带头人”教师党支部书记的特点及优势,并以一个高校“双带头人”教师党支部书记工作室为例,探索出一套可示范推广的工作机制和工作方法.
关键词 ：
工作机制 工作机制 党支部书记 党支部书记 双带头人 双带头人
引用：
复制并粘贴一种已设定好的引用格式，或利用其中一个链接导入到文献管理软件中。
| GB/T 7714 | 王丽梅 , 张永哲 , 刘玮 . 高校“双带头人”教师党支部书记工作室工作机制探索 [J]. | 北京教育（高教版） , 2021 , (3) : 74-76 . |
| MLA | 王丽梅 et al. "高校“双带头人”教师党支部书记工作室工作机制探索" . | 北京教育（高教版） 3 (2021) : 74-76 . |
| APA | 王丽梅 , 张永哲 , 刘玮 . 高校“双带头人”教师党支部书记工作室工作机制探索 . | 北京教育（高教版） , 2021 , (3) , 74-76 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
高校基层党组织广泛植根于高校教育和教学科研的最前沿,与广大高校师生有着最为紧密的联系,基层党建工作开展得是否入脑入心对高校落实好"培养什么人、怎样培养人、为谁培养人"起着重要的作用。结合现有高校教师党支部书记选配现状及面临的挑战,总结了"双带头人"教师党支部书记的特点及优势,并以一个高校"双带头人"教师党支部书记工作室为例,探索出一套可示范推广的工作机制和工作方法。
关键词 ：
党支部书记 党支部书记 双带头人 双带头人 工作机制 工作机制
引用：
复制并粘贴一种已设定好的引用格式，或利用其中一个链接导入到文献管理软件中。
| GB/T 7714 | 王丽梅 , 张永哲 , 刘玮 . 高校“双带头人”教师党支部书记工作室工作机制探索 [J]. | 北京教育(高教) , 2021 , (03) : 74-76 . |
| MLA | 王丽梅 et al. "高校“双带头人”教师党支部书记工作室工作机制探索" . | 北京教育(高教) 03 (2021) : 74-76 . |
| APA | 王丽梅 , 张永哲 , 刘玮 . 高校“双带头人”教师党支部书记工作室工作机制探索 . | 北京教育(高教) , 2021 , (03) , 74-76 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
高校“双带头人”教师党支部书记工作室工作机制探索
关键词 ：
党支部书记 党支部书记 双带头人 双带头人 工作机制 工作机制
引用：
复制并粘贴一种已设定好的引用格式，或利用其中一个链接导入到文献管理软件中。
| GB/T 7714 | 王丽梅 , 张永哲 , 刘玮 et al. 高校“双带头人”教师党支部书记工作室工作机制探索 [J]. | 王丽梅 , 2021 , (3) : 74-76 . |
| MLA | 王丽梅 et al. "高校“双带头人”教师党支部书记工作室工作机制探索" . | 王丽梅 3 (2021) : 74-76 . |
| APA | 王丽梅 , 张永哲 , 刘玮 , 北京教育:高教版 . 高校“双带头人”教师党支部书记工作室工作机制探索 . | 王丽梅 , 2021 , (3) , 74-76 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
Silicon heterojunction solar cells are expected to increase their market share in the near future. Qu et al. identify an embedded nanotwin structure at the crystalline silicon/hydrogenated amorphous silicon interface of silicon heterojunction cells that limits the device performance and devise an approach to suppress its formation. The interface of high-quality crystalline silicon/hydrogenated amorphous silicon (c-Si/a-Si:H) is indispensable for achieving the ideal conversion efficiency of Si heterojunction solar cells. Therefore, it is extremely desirable to characterize and control the interface at the atomic scale. Here, we employ spherical aberration-corrected transmission electron microscopy to investigate the atomic structure of the c-Si/a-Si:H interface in high-efficiency Si heterojunction solar cells. Their structural evolution during in situ annealing is visualized at the atomic scale. High-density embedded nanotwins, detrimental to the device performance, are identified in the thin epitaxial layer between c-Si and a-Si:H. The nucleation and formation of these nanotwins are revealed via ex situ and in situ high-resolution transmission electron microscopy. Si heterojunction solar cells with low-density nanotwins are fabricated by introducing an ultra-thin intrinsic a-Si:H buffer layer and show better performance, indicating that the strategy to restrain embedded nanotwins can further enhance the conversion efficiency of Si heterojunction solar cells.
引用：
复制并粘贴一种已设定好的引用格式，或利用其中一个链接导入到文献管理软件中。
| GB/T 7714 | Qu, Xianlin , He, Yongcai , Qu, Minghao et al. Identification of embedded nanotwins at c-Si/a-Si:H interface limiting the performance of high-efficiency silicon heterojunction solar cells [J]. | NATURE ENERGY , 2021 , 6 (2) : 194-202 . |
| MLA | Qu, Xianlin et al. "Identification of embedded nanotwins at c-Si/a-Si:H interface limiting the performance of high-efficiency silicon heterojunction solar cells" . | NATURE ENERGY 6 . 2 (2021) : 194-202 . |
| APA | Qu, Xianlin , He, Yongcai , Qu, Minghao , Ruan, Tianyu , Chu, Feihong , Zheng, Zilong et al. Identification of embedded nanotwins at c-Si/a-Si:H interface limiting the performance of high-efficiency silicon heterojunction solar cells . | NATURE ENERGY , 2021 , 6 (2) , 194-202 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
Several valuable scientific investigations have been conducted these last few years in materials design and device engineering for perovskite solar cells (PSCs) to make them competitive compared to traditional silicon-based photovoltaic technologies. Consequently, high power conversion efficiency beyond 25% is nowadays reported. However, their long-term stability remains a significant challenge to overcome. Herein, the influence of fluorinated compounds on each layer of PSCs devices and their impact on the resulted device performances and stability is spotlighted. The fluorinated compounds exhibit attractive properties due to their very high electronegativity attributed to the fluorine atom, and their strong hydrophobicity. Thus, the introduction of these compounds is found to be a successful strategy to positively suppress the surface trap states, enhancing charge collection and reducing interfacial charge recombination. Besides, a better film quality and better energy level alignment is obtained, resulting in the improvement of device photovoltaic parameters such as the open-circuit voltage (Voc ), short-circuit current (Jsc ), and fill factor (FF), and then, the device's overall power conversion efficiency (PCE). Their long-term stability is also found to further be improved.
关键词 ：
fluorinated compounds fluorinated compounds perovskite solar cells perovskite solar cells power conversion efficiency power conversion efficiency stability stability
引用：
复制并粘贴一种已设定好的引用格式，或利用其中一个链接导入到文献管理软件中。
| GB/T 7714 | Ouedraogo Nabonswende Aida Nadege , Yan Hui , Han Chang Bao et al. Influence of Fluorinated Components on Perovskite Solar Cells Performance and Stability. [J]. | Small , 2021 , 17 (8) : e2004081 . |
| MLA | Ouedraogo Nabonswende Aida Nadege et al. "Influence of Fluorinated Components on Perovskite Solar Cells Performance and Stability." . | Small 17 . 8 (2021) : e2004081 . |
| APA | Ouedraogo Nabonswende Aida Nadege , Yan Hui , Han Chang Bao , Zhang Yongzhe . Influence of Fluorinated Components on Perovskite Solar Cells Performance and Stability. . | Small , 2021 , 17 (8) , e2004081 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
Metal-organic framework (MOF) is a promising electrochromic material due to its high specific surface area and tunable pore size, which can benefit the fast transportation of ion/charge. Here, a simple solvothermal deposition method for fabrication of Ni-MOF 74 electrochromic films on ITO is developed. It is found that the reaction temperature has played an important role in the morphology and electrochromic performance of as-prepared Ni-MOF 74 film. The film prepared at the optimized temperature exhibits the best electrochromic performance with a rapid switching speed (the coloration/bleaching time = 24.5/23.5 s). In addition, the optimized film displays a high optical contrast of 44.4% at 550 nm and can be stably switched for 650 cycles with < 21.5% contrast attenuation. The electrochromism of Ni-MOF 74 can be attributed to the oxidized and reduced states of 2,5-dihydroxyterephthalic acid ligands. This simple method can be broaden to fabricate other metal-based MOF films for electrochromic applications.
关键词 ：
Electrochromic materials Electrochromic materials ITO substrate ITO substrate Ni-MOF 74 Ni-MOF 74 Thin film Thin film
引用：
复制并粘贴一种已设定好的引用格式，或利用其中一个链接导入到文献管理软件中。
| GB/T 7714 | Zhang, Ning , Jin, Yuhong , Zhang, Qianqian et al. Direct fabrication of electrochromic Ni-MOF 74 film on ITO with high-stable performance [J]. | IONICS , 2021 , 27 (8) : 3655-3662 . |
| MLA | Zhang, Ning et al. "Direct fabrication of electrochromic Ni-MOF 74 film on ITO with high-stable performance" . | IONICS 27 . 8 (2021) : 3655-3662 . |
| APA | Zhang, Ning , Jin, Yuhong , Zhang, Qianqian , Liu, Jingbing , Zhang, Yongzhe , Wang, Hao . Direct fabrication of electrochromic Ni-MOF 74 film on ITO with high-stable performance . | IONICS , 2021 , 27 (8) , 3655-3662 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
One-dimensional materials have been intensively studied because of their diverse properties, which are revealed when exfoliated from their bulk precursor. Liquid exfoliation is not only possibly the most suitable method for large-scale applications but also affords an opportunity to develop new deposition techniques. Fibrous phosphorus is a relatively new, one-dimensional material with high carrier mobility and a fast response velocity for future application in nanodevices. Because controllable liquid exfoliation processing of fibrous phosphorus (FP) remains challenging, we considered two factors: the exfoliated result and the removable solvents. We proposed a method for determining suitable solvents for efficient exfoliation and controllable size of fibrous phosphorus using Hansen solubility parameters. By controlling the water/acetone mixture ratios, the exfoliation effect could be controlled. Our work showed that 40% of the FP nanofibers were less than 10 nm in thickness and 70% of them were less than 20 nm. Furthermore, fibrous phosphorus produced a red fluorescence in bioimaging.
引用：
复制并粘贴一种已设定好的引用格式，或利用其中一个链接导入到文献管理软件中。
| GB/T 7714 | Zhang Guoqing , Liu Danmin , Tian Nan et al. Controllable Liquid Exfoliation of Fibrous Phosphorus and Its Live-Cell Imaging. [J]. | Inorganic chemistry , 2021 , 60 (7) : 4883-4890 . |
| MLA | Zhang Guoqing et al. "Controllable Liquid Exfoliation of Fibrous Phosphorus and Its Live-Cell Imaging." . | Inorganic chemistry 60 . 7 (2021) : 4883-4890 . |
| APA | Zhang Guoqing , Liu Danmin , Tian Nan , Wang Xiuhong , Yan Wujuan , Huang Zikun et al. Controllable Liquid Exfoliation of Fibrous Phosphorus and Its Live-Cell Imaging. . | Inorganic chemistry , 2021 , 60 (7) , 4883-4890 . |
| 导入链接 | NoteExpress RIS BibTex |
导出
| 数据： |
选中 到 |
| 格式： |
