线性电压扫描下1VIIS器件瞬态的简单模型

本文用准平衡模型分析讨论了线性电压扫描下MIS器件的I/V瞬态.文中除了给出一般的处理方法以外，还给出了几种不同电压扫描率下I/Y特性的计算结果，并与已往的模型作了比较.     

准平衡模型下脉冲MOS电容器的瞬态特性

本文给出了描写咏冲MOS电容器的瞬态特性的微分方程.产生区宽度采用准平衡模型来计算,反型少子的非稳态产生的影响已被计及.文中给出了用Runge-Kutta方法得到的1-t和C-t瞬态特性曲线,并进行了详细讨论     

线性电压扫描法测量硅的体产生寿命和表面产生速度的研究`

本文采用 Rab bain 的 产 生 区 宽度模 型,导 出了描述线性 电压 扫描 作用下 M O S 电容 器的电容 一 时间瞬态特性的微分方程,通过积分这一微分方程,得到 了描述线性 电压 扫描作用的M O S 电容器的 电容 一时 间瞬 态特性方 程.依据这 一方 程,提出了一 种确定体产生寿命和 表面产生速度的计算方法.     

Preparation of the amphiphilic copolymer of poly(γ-benzyl L-glutamate)-g-poly(ethylene glycol) with different grafting ratio

Poly(γ-benzyl L-glutamate)- g-poly(ethylene glycol) (PBLG-g- PEG) with different grafting ratio was prepared using P-toluenesulfonic acid as catalyst. The effect of the molecular weight of mono- methyl oligo(ethylene glycol), the molar feed ratio and reaction time on the grafting ratio was investigated. The micelles of PBLG-g-PEG were prepared by the dialysis method in deionized water. Transmission electron microscopy and dynamic light scatter studies showed that the micelles exhibited spherical morphologies and the diameter of the micelles was in the range of 50–200 nm. Clonazepam was loaded onto the core part of the micelles and drug-loading content and rele ase rate were dependent on the grafting ratio.     

表面复合速度和结深对硅扩散n十-p 结太阳电池性能的影响

假设扩散区的杂质分布为高斯分布,本文给出了扩散n~+-P结太阳电池扩散n~+区少子连续性方程一个形式简单的解。在此基础上对若干实例进行了计算和分析,以研究表面复合速度和结深对太阳电池性能的影响。 本文指出,为使太阳电池有高的收集效率,必须把表面复合速度控制在10~4cm/s以下。除了表面复合速度以外,也研究了杂质分布引起的内建漂移场对光生少子在表面复合的影响。内建漂移场与结深有关。本文指出,与较高的漂移场相应的浅结更有利于削弱光生少子在表面的复合。     

Oxidative radical phosphonotrifluoromethylthiolation of unactivated alkenes with alkyl phosphonate,silver(I) trifluoromethanethiolate and potassium persulfate

We report herein a mild and efficient oxidative radical intermolecular phosphonotrifluoromethylthiolation of unactivated alkenes with good functional group tolerance. The reaction operates via a radical pathway involving oxidative generation of phosphonyl radicals and umpolung radical coupling of silver trifluoromethanethiolate.     

用表面光压(SPV)法确定异型外延材料中的少子扩散长度

本文分析了用sPv法确定异型外延材料少子扩散长度的可行性，并对典型工艺参数，给出了有效少子扩散长度L。与外延层厚度d、外延层及栩}少子扩散长度L,, L:的关系曲线.提供了一种确定外延层材料少子扩散长度的新方法。     

Inversion layer resistance in silicon inversion layer solar cells

The inversion layer resistance is very important for metal-insulator-semiconductor inversion layer (MIS/IL) solar cells, and usually it is the main part of the series resistance. It is found that the inversion layer resistance and the junction depth are determined by the operating voltage for an MIS/IL solar cell. On the basis of MIS theory, a general relationship between the operating voltage and the inversion layer resistance (and the junction depth) has been investigated. Practical computations have been done for MIS/IL solar cells with a silicon nitride insulator layer. It is found that the inversion layer resistance has a minimum value for operating voltage near 0.4 V, and the junction depth decreases monotonically with the increase of the operating voltage.     

基于 Ieda模型的产生区电流与产生 区宽度的理论关系

采 用 e I da 提 出的载流子发 射的三维 模型,研究了半 导体 中载 流子的 电场增强 产生现,推导 出基于三 维模 型的产 生区 电流 与产 生区宽度的理论关系,象果并用 于解 释有关的实验结果     

Synthesis and Characterization of Hydroxyl‐Terminated Poly(γ‐benzyl‐L‐glutamate)

In order to provide an active end group of hydroxyl group and improve the hydrophility of poly(γ‐benzyl‐L‐glutamate) (PBLG), ethanolamine (EA) was utilized as the initiator to initiate N‐carboxy‐γ‐benzyl‐L‐glutamate anhydride (Bz‐L‐Glu‐NCA) polymerization. The prepared hydroxyl‐terminated PBLG (HO‐PBLG) was fully characterized by FTIR, ¹H‐NMR, XPS, XRD, DSC, and GPC. The results of FTIR and XRD indicated that the chain conformation of HO‐PBLG predominantly presented α‐helix. The water contact angle was measured to confirm that the hydrophilicity was improved by the introduction of hydroxyl group. Chondrocytes studies showed that the cells attachment efficiency on the HO‐PBLG film was good and the cells grew well.