内嵌自组装InAs量子点调制掺杂场效应管的光电特性

研究了阱中生长自组装InAs量子点的光谱特性，获得了室温1.265μm近红外荧光发光，探讨了与量子点尺寸分布相关的发光峰随温度的超常红移现象. 制备了内嵌InAs量子点的异质结调制掺杂场效应晶体管，获得了高耐压的场效应器件电学特性，并有望制成新型红外光电探测场效应管.     

内嵌自组装InAs量子点调制掺杂场效应管的光电特性

研究了阱中生长自组装InAs量子点的光谱特性,获得了室温1.265μm近红外荧光发光,探讨了与量子点尺寸分布相关的发光峰随温度的超常红移现象.制备了内嵌InAs量子点的异质结调制掺杂场效应晶体管,获得了高耐压的场效应器件电学特性,并有望制成新型红外光电探测场效应管.     

内嵌自组装InAs量子点调制掺杂场效应管的光电特性

研究了阱中生长自组装InAs量子点的光谱特性,获得了室温1.265μm近红外荧光发光,探讨了与量子点尺寸分布相关的发光峰随温度的超常红移现象.制备了内嵌InAs量子点的异质结调制掺杂场效应晶体管,获得了高耐压的场效应器件电学特性,并有望制成新型红外光电探测场效应管.     

亚微米栅长调制掺杂场效应管(MODFET)的制造

本文简述了调制掺杂场效应管(MODFET)材料参数的设计原理,0.2μm栅长T型栅的制造工艺以及为了获得0.2μm栅长的器件所要求的电子束曝光的详细条件.虽然所用材料的缓冲层纯度不够高(～1×10~(15)cm~(-3)),但由于采用了T型结构,器件室温跨导值仍达到了200mS/mm,在77K为375mS/mm.     

功率场效应管建模和特性仿真

介绍了pspice中功率场效应管模型的建立方法,并仿真测试了它的一些特性。     

并五苯场效应管的电学特性

介绍了用高真空中热蒸发镀膜的方法制备并五苯薄膜场效应晶体管.作为场效应管半导体层的并五苯薄膜沉积在p型Si(100)(14.0～20.0 Ω·cm)衬底上.场效应管中并五苯薄膜厚度为70nm,源极、漏极和栅极(Au)的厚度均为50nm,绝缘层SiO2的厚度为300nm,沟道宽度为190μm,沟道长度为15μm.用AFM表征了并五苯薄膜表面形貌,并研究了薄膜生长速率对并五苯场效应晶体管电学特性的影响.在薄膜生长速率为0.24和1.36 nm/min时,场效应管的载流子迁移率分别为2.7×10-4和2.2×10-6 cm2/(V·s).     

并五苯场效应管的电学特性

介绍了用高真空中热蒸发镀膜的方法制备并五苯薄膜场效应晶体管. 作为场效应管半导体层的并五苯薄膜沉积在p型Si (100) (14.0～20.0Ω·cm）衬底上. 场效应管中并五苯薄膜厚度为70nm，源极、漏极和栅极（Au）的厚度均为50nm，绝缘层SiO2的厚度为300nm，沟道宽度为190μm，沟道长度为15μm. 用AFM表征了并五苯薄膜表面形貌，并研究了薄膜生长速率对并五苯场效应晶体管电学特性的影响. 在薄膜生长速率为024和136nm/min时，场效应管的载流子迁移率分别为2.7E-4和2.2E-6cm2／(V·s) .     

电容加载对频率选择表面传输特性的影响

有源频率选择表面,是指在频率选择表面中加入变容二极管或PIN二极管等有源器件构成的FSS结构,通过有源器件的可调性来实现对FSS性能的控制。文中根据有源器件的电容等效原理,设计了一种方形缝隙FSS结构,研究了电容加载对FSS传输特性的影响。仿真结果表明,加载电容后其谐振频点向低频偏移,带宽减小,且加载电容对FSS传输特性有较好的可控性。     

Sub-Thermionic Negative Capacitance Field Effect Transistors with Solution Combustion-Derived Hf0.5Zr0.5O2

The fabrication of Hf_0.5Zr_0.5O₂-ferroelectric negative capacitor using solution combustion is presented for the first time. The starting materials used for the solution combustion to form equimolar Hf_0.5Zr_0.5O₂ are to act as both combustible elements and cation sources. Jain's method, which is used for estimating the stoichiometric quantities of precursors in propellant chemistry, has also been modified and applied. The conventional assumption for this method that molecular oxygen does not take part in the reaction is refuted and stoichiometric combustion in the presence of molecular oxygen is proposed. This reaction is followed by post-rapid thermal processing to stabilize the metastable, non-centrosymmetric orthorhombic phase. The thin film stacks, Hf_0.5Zr_0.5O₂/HfO₂, are used to achieve sub-thermionic swing (forward sweep: 25.42  ± 8.05 mV dec⁻¹, reverse sweep: 42.56  ± 4.87 mV dec⁻¹) in MoS₂ negative capacitance field effect transistors with a hysteresis of ≈ 40 mV at 1 nA, resulting in ultra-low-power operation.     

多晶硅薄膜晶体管的栅电容模型

多晶硅薄膜晶体管具有独特的栅电容特性,即泄漏区中栅源电容的反常增大和饱和区中栅漏电容由于kink效应的增大.基于Meyer模型,考虑了泄漏产生效应和kink效应,对多晶硅薄膜晶体管的栅漏电容和栅源电容特性进行了建模研究.对实验数据进行拟合发现,提出的模型与实验数据符合得较好,能准确地预测多晶硅薄膜晶体管的栅电容特性.     

基于表面势的多晶硅薄膜晶体管的栅电容模型

显式地推导多晶硅薄膜晶体管(Polysilicon thin-film transistors,poly-SiTFT)表面势隐含方程的近似解,该求解法非迭代的计算大大地提高了计算效率,且精确度非常高,与数值迭代结果比较,绝对误差范围只在纳伏数量级。利用求得的表面势,建立了一个poly-SiTFT栅电容模型,该电容电压模型能连续、准确地描述poly-SiTFT在线性区和饱和区的动态特性,同时该模型考虑了kink效应、沟道长度调制效应和寄生电容等。对实验数据进行拟合发现,提出的模型与实验数据符合得较好,能准确地预测poly-SiTFT的栅电容特性。     

Influence of Gate Dielectrics of Field-Effect Graphene Transistors on Current-Voltage Characteristics

Russian Microelectronics - Field-effect graphene transistors (FGTs) based on single-layer graphene using the developed simplified combined self-consistent model are simulated. It is used to compare...     

液晶盒的电容特性

液晶盒外加一定的电压,会改变液晶分子的取向排列,这样液晶层的有效介电常数也会随之发生改变。如果把液晶盒看作一个电容器,其电容也会有所改变。本论文理论研究强锚泊混合排列向列相液晶盒的电容特性,基于液晶弹性理论和变分原理,理论推导液晶盒系统的平衡态方程及电容的解析表达式,通过Matlab软件数值模拟了此液晶盒的电容-电压曲线和指向矢分布曲线,并对其电容特性进行了分析。     

A High‐Capacitance Salt‐Free Dielectric for Self‐Healable,Printable, and Flexible Organic Field Effect Transistors and Chemical Sensor

Printable and flexible electronics attract sustained attention for their low cost, easy scale up, and potential application in wearable and implantable sensors. However, they are susceptible to scratching, rupture, or other damage from bending or stretching due to their “soft” nature compared to their rigid counterparts (Si‐based electronics), leading to loss of functionality. Self‐healing capability is highly desirable for these “soft” electronic devices. Here, a versatile self‐healing polymer blend dielectric is developed with no added salts and it is integrated into organic field transistors (OFETs) as a gate insulator material. This polymer blend exhibits an unusually high thin film capacitance (1400 nF cm^?2 at 120 nm thickness and 20–100 Hz). Furthermore, it shows pronounced electrical and mechanical self‐healing behavior, can serve as the gate dielectric for organic semiconductors, and can even induce healing of the conductivity of a layer coated above it together with the process of healing itself. Based on these attractive properties, we developed a self‐healable, low‐voltage operable, printed, and flexible OFET for the first time, showing promise for vapor sensing as well as conventional OFET applications.     

用于流体压力测量的电容传感器

叙述了电容应变式流体压力传感器的基本原理，给出了一种电容应变式流体压力传感器的检测电路，并分析了流体压力大小与传感器输出电压的关系。实验结果表明，该传感器具有精度高、线性度好、灵敏度大等优点，尤其适于微压力和大动态力的测量。     

Impurity Deionization Effects on Surface Recombination DC Current-Voltage Characteristics in MOS Transistors

Impurity deionization on the direct-current current-voltage characteristics from electron-hole recombi-nation(R-DCIV)at SiO<,2>/Si interface traps in MOS transistors is analyzed using the steady-state Shockley-Rea-Hall recombination kinetics and the Fermi distributions for electrons and holes.Insignificant distortion is observed over 90%of the bell-shaped R-DCIV curves centered at their peaks when impurity deionization is excluded in the theory.This is due to negligible impurity deionization because of the much lower electron and hole concentrations at the interface than the impurity concentration in the 90% range.