Physics for Information Science: Unit II: Semiconductor Physics
Introduction of Semiconductor Physics
We know materials are classified on the basis of conductivity and resistivity. Semiconductors are the materials which has conductivity, resistivity inbetween conductors and insulators.
UNIT II
CHAPTER 2
SEMI CONDUCTOR PHYSICS
Introduction -Properties of Semiconductor-Direct
and Indirect Band Gap Semiconductors -Types of Semiconductors -Intrinsic
Semiconductor -Density of Electrons in Conduction Band - Density of Holes in
Valence Band -Variation of Fermi Energy Level and Carrier Concentration With
Temperature in an Intrinsic Semiconductor Mobility and Electrical Conductivity of
Intrinsic Semiconductors Determination of Band Gap Energy -Extrinsic
Semiconductor -Carrier Concentration in N-u Type Semiconductor -Carrier
Concentration in P-type Semiconductor-Variation of Fermi Energy Level With
-Temperature and Impurity Concentration in P-type Semiconductor -Variation of
Carrier Concentration With Temperature -Carrier Transport in Semiconductor -
Velocity -Electric Field Relations and Mobility of Charge Carriers -Drift and
Diffusion Transport-Einstein Relation [for Reference Purpose] - Effect of
Temperature on Carrier Transport -Hall Effect -Device To Find Hall Effect
[Experiment] - Applications of Hall Effect -Ohmic Contact -Schottky Diode
INTRODUCTION
We
know materials are classified on the basis of conductivity and resistivity.
Semiconductors are the materials which has conductivity, resistivity inbetween
conductors and insulators. The resistivity of a semiconductor is in the order
of 10-4 to 0.5 ohm-metre.
It
is not that resistivity alone decides whether a substance is a semiconductor
(or) not, because some alloys have resistivity which are in the range of
semiconductor's resistivity. Hence, there are some other properties like band
gap which distinguishes the materials as conductors, semiconductors and
insulators.
A
semiconductor is a solid which has the energy band similar to that of an
insulator. It acts as an insulator at absolute zero and as a conductor at high
temperatures and in the presence of impurities.
Physics for Information Science: Unit II: Semiconductor Physics : Tag: : - Introduction of Semiconductor Physics
Physics for Information Science: Unit II: Semiconductor Physics
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Physics for Information Science
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