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Si掺杂对Ga_(2)O_(3)/BP异质结光电性能调控的第一性原理研究

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原子与分子物理学报 2025年第4期42卷 131-137页

作者：李佳宏郝增瑞薛瑞鑫阚红梅关玉琴内蒙古工业大学理学院呼和浩特010010

近年来,氧化镓(Ga_(2)O_(3))是新一代超宽禁带(4.9 eV)半导体,基于优越的热稳定和化学稳定性、高击穿场强和可见光透过率等优点,在日盲紫外探测器和透明光电器件领域中引起了广泛的关注.但是,Ga_(2)O_(3)基光电器件存在迁移率较低而限... 详细信息

近年来,氧化镓(Ga_(2)O_(3))是新一代超宽禁带(4.9 eV)半导体,基于优越的热稳定和化学稳定性、高击穿场强和可见光透过率等优点,在日盲紫外探测器和透明光电器件领域中引起了广泛的关注.但是,Ga_(2)O_(3)基光电器件存在迁移率较低而限制其应用的现象,而构建合适的Ga_(2)O_(3)异质结是改善光电探测器的光电性能的有效手段之一.基于第一性原理构建β-Ga_(2)O_(3)/BP异质结模型,研究了氧空位(Vo)和Si掺杂对β-Ga_(2)O_(3)/BP异质结光电性质的调控以及相关机理.结果显示:β-Ga_(2)O_(3)/BP异质结结构有效降低β-Ga_(2)O_(3)功函数,提高灵敏度,Si掺杂降低结合能,增强稳定性;β-Ga_(2)O_(3)/BP异质结有效减小带隙,Si掺杂以及氧空位的存在,进一步减小带隙,增强光导电性,并且Si掺杂引起了光电导各向异性.此结果对改善Ga_(2)O_(3)基异质结光电性能提供理论参考.

关键词： β-Ga_(2)O_(3)/BP异质结缺陷光电性质第一性原理

Solid-liquid Metastable Equilibria in Quaternary System (NaCl+Na_2CO_3+Na_2SO_4+H_2O) at 273.15 K

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Chemical Research in Chinese Universities 2010年第1期26卷 114-117页

作者： WANG rui-lin zeng Ying Department of Chemical Engineering Chengdu University of Technology Chengdu 610059 P. R. China

The metastable phase equilibria of the quaternary system NaCl＋Na2CO3＋Na2SO4＋H2O were studied at 273.15 K. The salts＇ solubilities, densities and pH values of the equilibrated solution in this system were determined. According to the experimental data, the metastable equilibrium phase diagram, the diagram of density vs. composition and pH vs. composition diagram were plotted. The phase diagram consists of five univariant curves, four crystallization fields and two invariant points. The four crystallization fields correspond to sodium carbonate decahydrate （Na2CO3·10H2O）, sodium sulfate decahydrate（Na2SOn-10H2O）, sodium chloride（NaCl） and burkeite（2Na2SO4. Na2CO3）, respectively. The crystallization field of sodium sulfate decahydrate（Na2SO4.10H2O） is the largest, which indicates that sodium sulfate is easy to saturate and crystallize from solution at 273.15 K.

关键词： Quaternary system Metastable phase equilibrium Sulfate

Endobronchial ultrasound-guided transbronchial needle aspiration： unraveling myths of mass in the chest

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Chinese Journal of Cancer Research 2014年第6期26卷 732-734页

作者： rui Wang Guangqiao zeng State Key Laboratory of Respiratory Disease National Clinical Center for Respiratory Diseases Guangzhou Institute of Respiratory Diseases FirstAffiliated Hospital Guangzhou Medical University Guangzhou 51012 0 China

Lung cancer is one of the most common neoplasms worldwide and a major cause of cancer *** diagnosis and accurate staging for patients with suspected lung cancer are essential to appropriate ***,many of submucosal or p... 详细信息

关键词： submucosal guided neoplasms aspiration staging needle chest malignancy despite alone

View planning in robot active vision: A survey of systems,algorithms, and applications

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Computational Visual Media 2020年第3期6卷 225-245页

作者： rui zeng Yuhui Wen Wang Zhao Yong-Jin Liu BNRist Department of Computer Science and TechnologyTsinghua UniversityBeijingChina

Rapid development of artificial intelligence motivates researchers to expand the capabilities of intelligent and autonomous robots. In many robotic applications, robots are required to make planning decisions based on perceptual information to achieve diverse goals in an efficient and effective way. The planning problem has been investigated in active robot vision, in which a robot analyzes its environment and its own state in order to move sensors to obtain more useful information under certain constraints. View planning,which aims to find the best view sequence for a sensor,is one of the most challenging issues in active robot vision. The quality and efficiency of view planning are critical for many robot systems and are influenced by the nature of their tasks, hardware conditions, scanning states, and planning strategies. In this paper, wefirst summarize some basic concepts of active robot vision, and then review representative work on systems,algorithms and applications from four perspectives:object reconstruction, scene reconstruction, object recognition, and pose ***, some potential directions are outlined for future work.

关键词： robot hardware planning

Design and analysis of a mode-hop-free tunable laser based on etched diffraction grating

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Journal of Zhejiang University-Science C(Computers and Electronics) 2010年第10期11卷 793-797页

作者： rui-xing zeng Lei WANG Jian-jun HE Center for Integrated Optoelectronics State Key Lab of Modern Optical Instrumentation Zhejiang University Hangzhou 310027 China

A novel semiconductor laser which can achieve mode-hop-free tuning is proposed. The device consists of an etched diffraction grating （EDG） as a dispersive element to provide the mode selection function and an active waveguide to provide optical gain for the laser. The slab waveguide region of the EDG contains a tuning section covered by an electrode to inject a tuning current, and thus changes the refractive index. Mode-hop-free tuning is achieved by specially designing the shape of the tuning section, so that the tuning rate of the central wavelength reflected by the EDG and the tuning rate of the resonant wavelength of the laser cavity are equal. An optimized tuning section shape is designed to obtain the largest tuning range within a limited current range. Numerical simulation is presented to demonstTate the mode-hop-free tuning operation.

关键词： Semiconductor laser Integrated optics Etched diffraction grating

Investigation of the relationship between place characteristics and child behavior in residential landscape spaces： a case study on the Century Sunshine Garden Residential Quarter in Hefei

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Frontiers of Architectural Research 2012年第2期1卷 186-195页

作者： Zao Li rui zeng Maosheng Ye College of Architecture and Art Hefei University of Technology Hefei 230009 China

This paper reviewed child behavior in Chinese residential landscapes. A field survey was used to investigate place characteristics, whereas fixed-point observation and visualization records were utilized to analyze child behavior. Children were then classified into two categories, namely, those with action capacity and those with little capacity. Based on the classification and comparative analysis of place characteristics, along with the quantitative and visualized analysis of child behavior, the relationship between these two aspects was determined, and the effect of spatial elements in the selected residential areas on such a relationship was clarified. Additionally, the designing of a comprehensive landscape space that satisfies children＇s needs was also discussed. The conclusions are as follows：（1） Waterside is the element that most significantly affects child behavior. Children who can act on their own prefer to play along the waterside. （2） Open spaces attract children with action capacity, whereas children with little capacity tend to choose more private spaces. （3） Despite the presence of facilities for various activities, an extremely open space or one that is separated by a road still affects child behavior. （4） A comprehensive space with a water landscape, fitness facilities, high accessibility, and a number of cultural events may significantly affect child behavior. Both types of children were found to enjoy a place with such characteristics. Therefore, the evaluation of residential landscape space should be intesrated with landscape design.

关键词： Ptace characteristics Child behavior Action capacity Retationship Residential tandscapespaces

Is Acupressure Useful for Alleviating Hyperventilation Syndrome?

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Chinese Journal of Integrative Medicine 2019年第6期25卷 468-470页

作者： zeng rui-xiang CHEN Mao-sheng ZHANG Min-zhou Division of Chest Pain Center Guangdong Provincial Hospital of Chinese Medicinethe 2nd Clinical College of Guangzhou University of Chinese Medicine

Case Report On April 23, 2017, a plane was flying from Hefei to Guangzhou in China. About 20 min after takeoff, a 30-year-old female passenger suddenly had on set of face redde ned all over, breathless ness, dyspnoea, palpitation and chest pain. Fortunately, two doctors came over to give help, one is Prof. Zhang, a cardiovascular specialist, the other one is Prof. Tan, a cardiovascular surgery specialist. After inquiring symptoms, two doctors believed that the woman had no organic abnormalities according to several medical examinations before, and once had a similar attack.

关键词： Acupressure Useful Alleviating Hyperventilation Case Report

Multicolor circularly polarized phosphorescence of axially chiral binuclear platinum(Ⅱ) complexes

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Science China Chemistry 2024年第11期67卷 3757-3766页

作者： Jintong Song rui zeng Hui Xiao Hailiang Ni Zong-Xiang Xu Haifeng Xiang College of Chemistry and Materials Science Sichuan Normal UniversityChengdu 610068China College of Chemistry Sichuan UniversityChengdu 610064China Department of Chemistry Southern University of Science and TechnologyShenzhen 518000China

D-A charge transfer, including through-bond charge transfer and through-space charge transfer between two different electron donors(D) and electron acceptors(A), is a fundamental and powerful tool to tune the optical properties of organic dyes. Herein,we demonstrate a unique strategy to tune phosphorescence and circularly polarized luminescence properties of axially chiral binuclear Pt(Ⅱ) complexes through long-range charge transfer, even though these molecules have two totally identical segments on either side of the chiral core. The presence of axial chirality would break not only the symmetry of molecular structure and π-conjugation system but also the symmetry of charge distribution for long-range charge transfer. These binaphthyl-based Pt(Ⅱ)complexes bearing coordinated atoms far away from chiral axis exhibit no Pt-Pt interactions but colorful concentrationdependent phosphorescence with quantum yield up to 86.4% and could be applied as emitters in highly efficient solutionprocessed organic light-emitting diodes to achieve luminance, luminance efficiency, power efficiency, external quantum efficiency, and asymmetry factor up to 8.94 × 10^(3)cd m^(-2), 41.9 cd A-1, 18.8 lm W^(-1), 12.6% and 2.98 × 10^(-3), respectively. Therefore,the present work affords a new and simple way to utilize the inherently asymmetric advantage of chirality for the design of D-Abased organic dyes.

关键词： Pt(Ⅱ)complexes organic light-emitting diodes circularly polarized phosphorescence axial chirality

Correlation between current and cross-sectional area of parallel fixed-movable dual electrodes in ESC

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China Foundry 2020年第3期17卷 245-249页

作者： Li-ting Zhao Yun-long Xiong rui Chen zeng-rui Wang An-guo Wang State Key Laboratory of Light Alloy Casting Technology for High-end Equipment Shenyang 110022China Shenyang Research Institute of Foundry Co. Ltd.Shenyang 110022China School of Materials Science and Engineering Shenyang Aerospace UniversityShenyang 110136China

Electroslag casting with parallel fixed-movable dual electrodes is a new method for achieving better quality of castings in complex mold *** this work,a mathematical model,y=kx^2+(k+1)x,was established to describe the ideal correlation between the current ratio(y)and the cross-sectional area ratio(x)of the dual electrodes,where k is the filling *** was conducted on the electroslag casting process with dual electrodes of various cross-sectional areas,but at a constant k *** experimental results indicated that the ideal correlation was obtained at the stable casting stage,and the fitting results were consistent with the experimental results at certain k *** experimental findings show that better castings can be obtained when the current ratio is greater than 1.536 and the cross-sectional area ratio is greater than 0.5.

关键词： electroslag casting fixed-movable dual electrode current ratio cross-sectional area ratio