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AlGaN Channel High Electron Mobility Transistors with Ultra-Low Drain-Induced-Barrier-Lowering Coefficient

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Chinese Physics Letters 2013年第12期30卷 123-125页

作者： HA Wei ZHANG Jin-Cheng zhao sheng-lei GE Sha-Sha WEN Hui-Juan ZHANG Chun-Fu MA Xiao-Hua HAO Yue Key Laboratory of Wide Band Gap Semiconductor Materials and Devices School of MicroelectronicsXidian UniversityXi'an 710071

The conventional AlGaN/GaN high electron mobility transistor(HEMT),the AlGaN/GaN/AlGaN HEMT,and the Al_(x)Ga_(1-x)N/Al_(y)Ga_(1-y)N HEMT are fabricated on sapphire substrates to study the drain-induced barrier-lowering(DIBL)*** is found that the Al_(x)Ga_(1-x)N/Al_(y)Ga_(1-y)N HEMT with AlGaN channel has the lowest DIBL coefficient of 6.7 mV/V compared with the other two *** is attributed to the best two-dimensional electron gas confinement of the Al_(x)Ga_(1-x)N/Al_(y)Ga_(1-y)N *** opinion is further confirmed by the conduction band diagrams and electron distribution calculated from the one-dimensional Poisson–Schrödinger equation.

关键词： AlGaN sapphire drain

Trap States in Al2O3 InAlN/GaN Metal-Oxide-Semiconductor Structures by Frequency-Dependent Conductance Analysis

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Chinese Physics Letters 2014年第3期31卷 137-139页

作者： ZHANG Peng zhao sheng-lei XUE Jun-Shuai ZHANG Kai MA Xiao-Hua ZHANG Jin-Cheng HAO Yue Key Laboratory of Wide Band-Gap Semiconductor Materials and Devices School of Microelectronics Xidian University Xi'an 710071

We present a detailed analysis of the trap states in atomic layer deposition Al2O3/InAlN/GaN high electron mobility transistors grown by pulsed metal organic chemical vapor deposition. Trap densities, trap energies and time constants are determined by frequency-dependent conductance measurements. A high trap density of up to 1.6×1014 cm？2eV？1 is observed, which may be due to the lack of the cap layer causing the vulnerability to the subsequent high temperature annealing process.

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Trap states induced by reactive ion etching in AlGaN/GaN high-electron-mobility transistors

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Chinese Physics B 2015年第11期24卷 460-463页

作者：罗俊赵胜雷宓珉瀚侯斌杨晓蕾张进成马晓华郝跃 Key Laboratory of Wide Band-Gap Semiconductor Materials and Devices School of Microelectronics Xidian University School of Advanced Materials and Nanotechnology Xidian University

Frequency-dependent conductance measurements were carried out to investigate the trap states induced by reactive ion etching in A1GaN/GaN high-electron-mobility transistors （HEMTs） quantitatively. For the non-recessed HEMT, the trap state density decreases from 2.48 × 1013 ***-1 at an energy of 0.29 eV to 2.79 × 1012 ***-1 at ET = 0.33 eV. In contrast, the trap state density of 2.38 × 1013-1.10× 1014 ***-1 is located at ET in a range of 0.30-0.33 eV for the recessed HEMT. Thus, lots of trap states with shallow energy levels are induced by the gate recess etching. The induced shallow trap states can be changed into deep trap states by 350 ℃ annealing process. As a result, there are two different types of trap sates, fast and slow, in the annealed HEMT. The parameters of the annealed HEMT are ET = 0.29-0.31 eV and DT = 8.16× 1012-5.58 × 1013 ***-1 for the fast trap states, and ET = 0.37-0.45 eV and DT = 1.84×1013- 8.50 × 1013 ***-1 for the slow trap states. The gate leakage currents are changed by the etching and following annealing process, and this change can be explained by the analysis of the trap states.

关键词： AlGaN/GaN high-electron mobility transistors (HEMTs) annealing reactive ion etching trapstates

Subretinal fibrosis secondary to neovascular age-related macular degeneration:mechanisms and potential therapeutic targets

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Neural Regeneration Research 2025年第2期20卷 378-393页

作者： Jingxiang Zhang Xia sheng Quanju Ding Yujun Wang Jiwei zhao Jingfa Zhang Department of Ophthalmology People’s Hospital of Huangdao DistrictQingdaoShandong ProvinceChina Department of Urology People’s Hospital of Huangdao DistrictQingdaoShandong ProvinceChina Department of Ophthalmology Shanghai General Hospital(Shanghai First People’s Hospital)Shanghai Jiao Tong University School of MedicineShanghaiChina National Clinical Research Center for Eye Diseases Shanghai Key Laboratory of Ocular Fundus DiseasesShanghai Engineering Center for Visual Science and PhotomedicineShanghai Engineering Center for Precise Diagnosis and Treatment of Eye DiseasesShanghaiChina

Subretinal fibrosis is the end-stage sequelae of neovascular age-related macular *** causes local damage to photoreceptors,retinal pigment epithelium,and choroidal vessels,which leads to permanent central vision loss of patients with neovascular age-related macular *** pathogenesis of subretinal fibrosis is complex,and the underlying mechanisms are largely ***,there are no effective treatment options.A thorough understanding of the pathogenesis of subretinal fibrosis and its related mechanisms is important to elucidate its complications and explore potential *** current article reviews several aspects of subretinal fibrosis,including the current understanding on the relationship between neovascular age-related macular degeneration and subretinal fibrosis;multimodal imaging techniques for subretinal fibrosis;animal models for studying subretinal fibrosis;cellular and non-cellular constituents of subretinal fibrosis;pathophysiological mechanisms involved in subretinal fibrosis,such as aging,infiltration of macrophages,different sources of mesenchymal transition to myofibroblast,and activation of complement system and immune cells;and several key molecules and signaling pathways participating in the pathogenesis of subretinal fibrosis,such as vascular endothelial growth factor,connective tissue growth factor,fibroblast growth factor 2,platelet-derived growth factor and platelet-derived growth factor receptor-β,transforming growth factor-βsignaling pathway,Wnt signaling pathway,and the axis of heat shock protein 70-Toll-like receptors 2/*** review will improve the understanding of the pathogenesis of subretinal fibrosis,allow the discovery of molecular targets,and explore potential treatments for the management of subretinal fibrosis.

关键词： choroidal neovascularization epithelial-mesenchymal transition mesenchymal transition myofibroblast neovascular age-related macular degeneration submacular fibrosis subretinal fibrosis therapeutic targets transforming growth factor-β vascular endothelial growth factor

Improved performance of AlGaN/GaN HEMT by N_2O plasma pre-treatment

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Chinese Physics B 2015年第2期24卷 382-386页

作者：宓珉瀚张凯赵胜雷王冲张进成马晓华郝跃 Key Laboratory for Wide Band-Gap Semiconductor Materials and Devices School of MicroelectronicsXidian University

The influence of an N2O plasma pre-treatment technique on characteristics of AlGaN/GaN high electron mobility transistor（HEMT） prepared by using a plasma-enhanced chemical vapor deposition（PECVD） system is *** the plasma treatment,the peak transconductance（gm） increases from 209 mS/mm to 293 mS/***,it is observed that the reverse gate leakage current is lowered by one order of magnitude and the drain current dispersion is improved in the plasma-treated *** the analysis of frequency-dependent conductance,it can be seen that the trap state density（DT） and time constant（τT） of the N20-treated device are smaller than those of a non-treated *** results indicate that the N2O plasma pre-pretreatment before the gate metal deposition could be a promising approach to enhancing the performance of the device.

关键词： GaN-based HEMTs N2O plasma pre-pretreatment frequency-dependent conductance

MXene Hybridized Polymer with Enhanced Electromagnetic Energy Harvest for Sensitized Microwave Actuation and Self‑Powered Motion Sensing

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Nano-Micro Letters 2025年第3期17卷 265-279页

作者： Yu‑Ze Wang Yu‑Chang Wang Ting‑Ting Liu Quan‑Liang zhao Chen‑Sha Li Mao‑sheng Cao School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081People’s Republic of China School of Materials Science and Engineering Peking UniversityBeijing 100871People’s Republic of China School of Mechanical and Material Engineering North China University of TechnologyBeijing 100144People’s Republic of China Key Laboratory of Functional Inorganic Material Chemistry Ministry of Education of the People’s Republic of ChinaHeilongjiang UniversityHarbin 150080People’s Republic of China

Polymeric microwave actuators combining tissue-like softness with programmablemicrowave-responsive deformation hold great promise for mobile intelligentdevices and bionic soft robots. However, their application is challenged by restricted electromagneticsensitivity and intricate sensing coupling. In this study, a sensitized polymericmicrowave actuator is fabricated by hybridizing a liquid crystal polymer with Ti3C2Tx(MXene). Compared to the initial counterpart, the hybrid polymer exhibits unique spacechargepolarization and interfacial polarization, resulting in significant improvements of230% in the dielectric loss factor and 830% in the apparent efficiency of electromagneticenergy harvest. The sensitized microwave actuation demonstrates as the shortenedresponse time of nearly 10 s, which is merely 13% of that for the initial shape memory polymer. Moreover, the ultra-low content of MXene (upto 0.15 wt%) benefits for maintaining the actuation potential of the hybrid polymer. An innovative self-powered sensing prototype that combinesdriving and piezoelectric polymers is developed, which generates real-time electric potential feedback (open-circuit potential of ~ 3 mV) duringactuation. The polarization-dominant energy conversion mechanism observed in the MXene-polymer hybrid structure furnishes a new approachfor developing efficient electromagnetic dissipative structures and shows potential for advancing polymeric electromagnetic intelligent devices.

关键词： Microwave absorption Electromagnetic response Energy harvest Self-sensing Soft actuator

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锂电负极材料中间相炭微球的应用研究进展

炭素 2023年第1期 39-42页

作者：赵圣雷黑龙江省龙煤鸡西矿业有限公司鸡西158100

锂离子电池作为一种新的化学能源,已经引起了研究者越来越多的关注。其中中间相碳微球市场发展潜力较大,但目前行业发展仍面临产量低、成本高等问题,难以满足日益增长的市场需求,因此中间相碳微球相关研究仍需进一步深入。本综述从材料... 详细信息

锂离子电池作为一种新的化学能源,已经引起了研究者越来越多的关注。其中中间相碳微球市场发展潜力较大,但目前行业发展仍面临产量低、成本高等问题,难以满足日益增长的市场需求,因此中间相碳微球相关研究仍需进一步深入。本综述从材料的制备方法着手,总结了锂离子电池中间项碳微球以及其复合负极材料的最新研究进展,探讨了制备方法、以及复合负极材料储锂性能的进展。

关键词：中间相炭微球负极材料锂电池

基于职业素养的汽车电工电子技术教学改革探索

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许昌学院学报 2011年第2期30卷 135-136页

作者：赵磊生广西交通职业技术学院汽车工程系广西南宁530023

通过采取有效措施,改变传统的教学模式,教学思想.以提高学生的职业素养为出发点,对汽车电工电子技术课程的教学模式、教学方法和考核方法等方面进行了一系列的改进,并取得了较好的教学效果.

关键词：职业素养考核课程

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东海煤矿阶梯掏槽爆破工艺实践

科技信息 2014年第7期 255-256页

作者：赵圣雷鸡西矿业集团东海煤矿黑龙江鸡西158175

鸡西矿业集团东海煤矿全岩工作面掘进单进过低,严重制约着开拓、下延工程的施工进度,长期如此造成全矿采面接续紧张、工程摆布困难、系统不合理等一切影响生产的诸多问题。据此现状,东海矿掘进系统领导带头从技术上入手,修改爆破工艺,... 详细信息

鸡西矿业集团东海煤矿全岩工作面掘进单进过低,严重制约着开拓、下延工程的施工进度,长期如此造成全矿采面接续紧张、工程摆布困难、系统不合理等一切影响生产的诸多问题。据此现状,东海矿掘进系统领导带头从技术上入手,修改爆破工艺,在单位时间内加大循环进度,真正的提高掘进单进,通过3个月的修改设计及井下反复试验,在二采区阶梯掏槽爆破工艺取得成功并在全矿推广,为缓解东海矿接续问题打下坚实的基础。

关键词：阶梯掏槽提高单进接续