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Chinese Physics Letters 2014年第3期31卷 129-132页

作者： YU Xin-Xin NI Jin-Yu LI Zhong-Hui kong Cen ZHOU Jian-Jun DONG Xun PAN Lei kong yue-chan CHEN Tang-Sheng Science and Technology on Monolithic Integrated Circuits and Modules Laboratory Nanjing Electronic Devices Institute Nanjing 210016

We report on the high breakdown performance of AlGaN/GaN high electron mobility transistors （HEMTs） grown on 4-inch silicon substrates. The HEMT structure including three Al-content step-graded AlGaN transition layers has a total thickness of 2.7 μm. The HEMT with a gate width WG of 300 μm acquires a maximum off-state breakdown voltage （BV） of 550 V and a maximum drain current of 527 mA/mm at a gate voltage of 2 V. It is found that BV is improved with the increase of gate-drain distance LGD until it exceeds 8 μm and then BV is tended to saturation. While the maximum drain current drops continuously with the increase of LGD. The HEMT with a WG of 3 mm and a LGD of 8 μm obtains an off-state BV of 500 V. Its maximum leakage current is just 13 μA when the drain voltage is below 400 V. The device exhibits a maximum output current of 1 A with a maximum transconductance of 242 mS.

关键词： High electron mobility transistors

A Substitution for the High-κ Dielectric in an AlGaN/GaN Metal-insulator-Semiconductor Heterostructure

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Chinese Physics Letters 2012年第5期29卷 225-228页

作者： kong yue-chan XUE Fang-Shi ZHOU Jian-Jun LI Liang CHEN Chen JIANG Wen-Hai Science and Technology on Monolithic Integrated Circuits and Modules Laboratory Nanjing Electronic Devices InstituteNanjing 210016

Paraelectric state ferroelectric material is proposed as a novel substitution for the conventional high-k dielectric used in AlGaN/GaN metal-insulator-semiconductor (MIS) field-effect *** superior potential for improving device transconductance is due to its unique switchable polar *** self-consistent calculation involving the switchable polarization of the paraelectric,the 2DEG properties and C-V characteristics are investigated and compared for the novel AlGaN/GaN metal-paraelectric-semiconductor (MPS) structure and an equivalent conventional MIS *** is shown that owing to the paraelectric polarization,the gate control of the 2DEG density is remarkably enhanced in the MPS structure and the gate capacitance is significantly improved with a smaller threshold *** self-consistent polarization of the paraelectric in the MPS structure is non-linsarly dependent on the saturated polarization,which implies an optimum saturated polarization of 5-10 μC/cm^(2) for the paraelectric.

关键词： polarization insulator saturated

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Ⅲ族氮化物异质结构二维电子气研究进展

物理学进展 2006年第2期26卷 127-145页

作者：孔月婵郑有炓南京大学物理系江苏省光电信息功能材料重点实验室南京210093

本文总结了近年来Ⅲ族氮化物半导体异质结构二维电子气的研究进展。从Ⅲ族氮化物材料晶格结构和特有的极化性质出发,重点讨论了AlGaN/GaN异质结构中二维电子气的性质,总结分析了异质结构中Al组分、势垒层厚度、应变弛豫度、掺杂等对二... 详细信息

本文总结了近年来Ⅲ族氮化物半导体异质结构二维电子气的研究进展。从Ⅲ族氮化物材料晶格结构和特有的极化性质出发,重点讨论了AlGaN/GaN异质结构中二维电子气的性质,总结分析了异质结构中Al组分、势垒层厚度、应变弛豫度、掺杂等对二维电子气浓度和迁移率的影响,同时还涉及AlGaN/GaN/AlGaN,AlGaN/AlN/GaN和AlGaN/InGaN/GaN等异质结构二维电子气性质。

关键词： Ⅲ族氮化物异质结构二维电子气综述自发极化压电极化迁移率

一种紧凑的GaN高电子迁移率晶体管大信号模型拓扑

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电子学报 2018年第2期46卷 501-506页

作者：韩克锋蒋浩秦桂霞孔月婵南京电子器件研究所江苏南京210016

GaN高电子迁移率晶体管(HEMT)以其复杂的器件特性使其大信号建模变得十分困难,尽管EEHEMT、Angelov等模型结构曾经成功应用于Ga As HEMT/MESFET的大信号模型,但当它们被用于GaN HEMT建模时却不再准确和完备.面向GaN HEMT器件的大信号模... 详细信息

GaN高电子迁移率晶体管(HEMT)以其复杂的器件特性使其大信号建模变得十分困难,尽管EEHEMT、Angelov等模型结构曾经成功应用于Ga As HEMT/MESFET的大信号模型,但当它们被用于GaN HEMT建模时却不再准确和完备.面向GaN HEMT器件的大信号模型,本文提出了一种紧凑的模型拓扑,此模型拓扑综合了GaN HEMT器件的直流电压-电流(I-V)特性、非线性电容、寄生参数、栅延迟漏延迟与电流崩塌、自热效应以及噪声等特性.经验证此模型拓扑在仿真中具有很好的收敛性,适用于GaN HEMT器件的大信号模型的建立,满足GaN基微波电路设计对器件模型的需求.

关键词：氮化镓高电子迁移率晶体管大信号模型非线性收敛性

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增强型GaN功率器件及集成技术

电力电子技术 2017年第8期51卷 58-60页

作者：周建军孔岑张凯孔月婵南京电子器件研究所宽禁带半导体电力电子器件国家重点实验室江苏南京210016

针对氮化镓(GaN)功率器件的研制,采用栅区域势垒层减薄技术及p-GaN栅结构,分别研制了阈值电压2 V以上、击穿电压1 200 V以上的凹槽栅结构和阈值电压1.1 V、击穿电压350 V以上、输出电流10 A以上的p-GaN栅结构增强型GaN功率器件。同时基... 详细信息

针对氮化镓(GaN)功率器件的研制,采用栅区域势垒层减薄技术及p-GaN栅结构,分别研制了阈值电压2 V以上、击穿电压1 200 V以上的凹槽栅结构和阈值电压1.1 V、击穿电压350 V以上、输出电流10 A以上的p-GaN栅结构增强型GaN功率器件。同时基于栅区域势垒层减薄技术,开发了GaN增强型/耗尽型(E/D)集成技术,并展示了采用E/D集成技术研制的51级GaN环形振荡器验证电路,集成了106只晶体管,级延时仅24.3 ps。

关键词：功率器件氮化镓增强型集成技术

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微波光子异质/异构集成技术

微波学报 2022年第5期38卷 46-53页

作者：孔月婵李海波马琨傑钱广微波毫米波单片集成和模块电路重点实验室南京210016 中国电子科技集团公司第五十五研究所南京210016

微波光子芯片是支撑微波光子学发展的基石。针对微波光子芯片材料体系多样、难以多功能集成等问题,异质/异构集成技术提供了一种有效途径。该技术可将不同材料体系的最优性能器件集成到同一芯片上,大大扩展微波光子芯片的功能,降低微波... 详细信息

微波光子芯片是支撑微波光子学发展的基石。针对微波光子芯片材料体系多样、难以多功能集成等问题,异质/异构集成技术提供了一种有效途径。该技术可将不同材料体系的最优性能器件集成到同一芯片上,大大扩展微波光子芯片的功能,降低微波光子功能模块的体积、重量,并提高其性能稳定性。本文介绍了目前主流的微波光子异质/异构集成技术和光电混合集成方面的主要研究进展,并对未来发展趋势进行展望。

关键词：微波光子芯片异质/异构集成光电集成

Micro-strain regulation strategy to stabilize perovskite lattice based on the categories and impact of strain on perovskite solar cells

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Journal of Energy Chemistry 2025年第1期100卷 578-604页

作者： Caixia Li Wenwu Liu Shiji Da Lingbin kong Fen Ran State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals Lanzhou University of Technology School of Materials Science and Engineering Lanzhou University of Technology

Photovoltaic metal halide perovskite solar cells(PSCs) convert light to electricity more efficiently than crystalline silicon cells, and the cost of materials used to make them is lower than that of silicon *** efficiency is not a core issue affecting the application of perovskite solar cells in special *** present, stability is the major technical encounters that hinders its further commercial development. Microstrain in PSCs is currently a significant factor responsible for the device's instability. Strain-induced ion migration is widely believed to accelerate perovskite degradation even when external stimuli are ***, it is imperative to study strain to enhance the stability of PSCs. This paper reviews recent developments to understand strain's origin and effect mechanisms on performance of PSCs, including ion migration,failure behavior, defect formation, and its effect on photoelectric properties, stability, and ***, several well-known strain management strategies are systematically introduced based on the strain effect mechanism and strain engineering on the film, providing more clues for further preparation with increased stability. The manipulation of external physical strain applied from films to entire devices has been extensively studied. Furthermore, recommendations for future research directions and chemical approaches have been provided. It is emphasized that strain engineering plays a crucial role in improving the efficiency and longevity of PSCs. Tensile strain causes rapid degradation, while moderate compressive strain and external strain control could improve properties and stability. Efforts should focus on controlling compressive strain to mitigate residual tensile strain and introducing it in a controlled manner. Future research endeavors may focus on exploring these pathways to improve the efficiency and lifespan of PSCs.

关键词： Halide perovskite solar cells Strain origins Strain effects Strain management

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340 GHz GaN大功率固态倍频链

微波学报 2023年第6期39卷 75-79页

作者：郑艺媛张凯代鲲鹏钱骏孔月婵陈堂胜固态微波器件与电路全国重点实验室南京210016 南京电子器件研究所南京210016

随着太赫兹技术的应用和发展,对大功率太赫兹固态源的需求愈加迫切。文中基于GaN肖特基二极管(SBD)工艺设计并制造了具有高功率输出的170 GHz和340 GHz太赫兹倍频器,实现了340 GHz大功率太赫兹固态倍频链。采用多管芯GaN SBD提高器件功... 详细信息

随着太赫兹技术的应用和发展,对大功率太赫兹固态源的需求愈加迫切。文中基于GaN肖特基二极管(SBD)工艺设计并制造了具有高功率输出的170 GHz和340 GHz太赫兹倍频器,实现了340 GHz大功率太赫兹固态倍频链。采用多管芯GaN SBD提高器件功率承载能力,综合开展电路优化设计提升倍频性能,通过仿真研究和实验测试,验证了倍频器设计的有效性和先进性。170 GHz倍频器的实测峰值输出功率达到580 mW,倍频效率为14.5%。340 GHz倍频器的实测峰值输出功率为66 mW,倍频效率为12.5%。该太赫兹固态倍频链性能优良,在太赫兹系统中具有重要的应用价值。

关键词：太赫兹氮化镓肖特基二极管倍频器

Efficient photocatalytic reduction of CO2 to formate by a molecular noble metal-free system

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Science China Chemistry 2025年第1期68卷 152-156页

作者： Lihua Zhang Lingjing Chen Huatian Shi yue Wei Gui Chen Tai-Chu Lau School of Environment and Civil Engineering Research Center for Eco-environmental Engineering Dongguan University of Technology Department of Chemistry and Institute of Molecular Functional Materials City University of Hong Kong

Reducing CO2to carbon-neutral solar fuels can not only alleviate the energy demand but also mitigate the greenhouse *** present,developing an efficient non-noble metal photo/electrocatalytic system for converting CO2to a specific product beyond CO is still a big ***,we report a new cobalt complex bearing 2,2′-bi-1,10-phenanthroline ligand that can photocatalytically reduce CO2to formate （HCOO-）.Turnover number （TON） for HCOO-up to 677 with 99%selectivity can be achieved using organic dyes purpurin as photosensitizer and 1,3-dimethyl-2-phenyl-2,3-dihydro-1H-benzo[d]imidazole （BIH） as sacrificial reductant in a CO2-saturated NMP/TEA （v/v,3:1） solution under visible light *** potential electrolysis at-1.41 V （***/Ag Cl） in the presence of 12 m M Et3NHBF4also produced HCOO-with Faradaic efficiency of 39%.Spectroscopic and electrochemical studies suggest that a[CoI-H]species is the key intermediate for CO2reduction.

关键词： photocatalysis noble metal-free CO2 reduction formate cobalt hydride

Dynamic Interaction Analysis of Coupled Axial-Torsional-Lateral Mechanical Vibrations in Rotary Drilling Systems

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Structural Durability & Health Monitoring 2025年第1期19卷 77-103页

作者： Sabrina Meddah Sid Ahmed Tadjer Abdelhakim Idir kong Fah Tee Mohamed Zinelabidine Doghmane Madjid Kidouche Applied Automation Laboratory Faculty of Hydrocarbons and ChemistryUniversity of BoumerdesBoumerdes35000Algeria Institute of Electrical and Electronic Engineering(IGEE) University of BoumerdesBoumerdes35000Algeria Laboratory of the Electrification of Industrial Enterprises University of BoumerdesBoumerdes35000Algeria Electrical Engineering Department Mohamed Boudiaf University of M’silaM’sila28000Algeria Department of Civil and Environmental Engineering King Fahd University of Petroleum&MineralsDhahran31261Saudi Arabia Interdisciplinary Research Center for Construction and Building Materials King Fahd University of Petroleum&Minerals(KFUPM)Dhahran31261Saudi Arabia

Maintaining the integrity and longevity of structures is essential in many industries,such as aerospace,nuclear,and *** achieve the cost-effectiveness of large-scale systems in petroleum drilling,a strong emphasis on structural durability and monitoring is *** study focuses on the mechanical vibrations that occur in rotary drilling systems,which have a substantial impact on the structural integrity of drilling *** study speciﬁcally investigates axial,torsional,and lateral vibrations,which might lead to negative consequences such as bit-bounce,chaotic whirling,and high-frequency *** events not only hinder the efﬁciency of drilling but also lead to exhaustion and harm to the system’s components since they are difﬁcult to be detected and controlled in real *** study investigates the dynamic interactions of these vibrations,speciﬁcally in their high-frequency modes,usingﬁeld data obtained from measurement while ***ﬁndings have demonstrated the effect of strong coupling between the high-frequency modes of these vibrations on drilling sys-tem *** obtained results highlight the importance of considering the interconnected impacts of these vibrations when designing and implementing robust control ***,integrating these compo-nents can increase the durability of drill bits and drill strings,as well as improve the ability to monitor and detect ***,by exploiting theseﬁndings,the assessment of structural resilience in rotary drilling systems can be ***,the study demonstrates the capacity of structural health monitoring to improve the quality,dependability,and efﬁciency of rotary drilling systems in the petroleum industry.

关键词： Rotary drilling systems mechanical vibrations structural durability dynamic interaction analysis ﬁeld data analysis