半导体物理与器件第四版课后习题答案(供参考).doc

Chapter4

4.1

whereandarethevaluesat300K.

(a)Silicon

(K)

(eV)

(cm)

(b)Germanium(c)GaAs

(K)

(cm)

(cm)

_______________________________________

4.2

Plot

_______________________________________

4.3

Bytrialanderror,K

(b)

Bytrialanderror,K

_______________________________________

4.4

AtK,

eV

AtK,

eV

or

oreV

Now

socm

_______________________________________

4.5

ForK,eV

ForK,eV

ForK,eV

ForK,

ForK,

ForK,

_______________________________________

4.6

Let

Then

Tofindthemaximumvalue:

whichyields

Themaximumvalueoccursat

(b)

Let

Then

Tofindthemaximumvalue

Sameaspart(a).Maximumoccursat

or

_______________________________________

4.7

where

and

Then

or

_______________________________________

4.8

Plot

_______________________________________

4.9

Plot

_______________________________________

4.10

Silicon:,

eV

Germanium:,

eV

GalliumArsenide:,

eV

_______________________________________

4.11

(K)

(eV)

()(eV)

_______________________________________

4.12