例1.设p型硅(如图7-2),受主浓度N4=10ycm3,试求: (1)室温下费米能级F的位置和功函数 (2)不计表面态的影响,该p型硅分别与铂和银接触后是否形成阻挡层?

1.Ⅱ一Ⅵ族化合物半导体起施主作用的缺陷是()。 A.正高子填隙 B.正离子缺位 C.负离子填隙

例1.有一硅样品,施主浓度为D=2,受主浓度为=10cm,已知 施主电离能△ED=E-E=0.05eV,试求99%的施主杂质电离时的温度。 思路与解:令N和NA表示电离施主和电离受主的浓度,则电中性方程为:

例1.证明对于能带中的电子,K状态和K状态的电子速度大小相等,方向相反。即: v(k)=-v(-k),并解释为什么无外场时,晶体总电流等于零 思路与解:K状态电子的速度为 v(k)= 同理,一K状态电子的速度则为

1.什么是材料科学?其任务是什么? 2.印刷包装材料的定义是什么?对于从事包装专的人员,为什么要学习印刷包装材料?如何学习?

Question 1 a. Expected returns Return on Return on State of the Economy Probability Security I Security II

1 a) Buy IBX stock in Tokyo and simultaneously sell them in NY, and your arbitrage profit is $2 per share. b)The prices will converge. c)Instead of the prices becoming exactly equal, there can remain 1%% discrepancy between

1 a) In an M&M frictionless environment, where there are no taxes and contracts are costless to make and enforce, the wealth of the shareholder is the same no matter what capital structure the firm adopts. In such an environment, neither the stock price nor shareholders' wealth would be affected

The present value of f100 received five years from now is ￡62.09 +0.10) b. The present value of f1000 received 60 years from now is

1.实际年利率 APR EAR=1+ 2.年金现值 CC 1 Pv r(1+r) -(+)