Semiconductor

1. NAME:
MOHAMMAD NURUL ISLAM EMON

3.  WHAT IS A SEMICONDUCTOR
 Type of semiconductor
 DOPING
 Type of Doped Semiconductors
 Importante of semiconductor
 Conclusion
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4. WHAT IS A SEMICONDUCTOR?
 A semiconductor is a material which
has electrical conductivity between that o
a conductor .
 such as copper
 an insulator such as glass.
 The conductivity of a semiconductor
increases with increasing temperature,
behavior opposite to that of a metal

5. Inextrinsic semiconductor
 The semiconductor is divided into
two types. The pure form of
the semiconductor is known as
the intrinsic semiconductor

6. Extrinsic semiconductor
 semiconductor in which intentionally
impurities is added for making it
conductive is known as the extrinsic
semiconductor.

7. Types of Doped Semiconductors
 1. N-type material:
when it contains excess free electrons it is
known as "n-type".
 2. P-type material:
When a doped semiconductor contains
excess holes it is called "p-type

8. DOPING
 Semiconductors belong to the 4th group
of the periodic table, which means that
they have four electrons in their outer
most or valence shells.
 The resistivity offered by the
semiconductor in this state can be
changed by adding an impurity which
changes the number of charge carries in
the atom. This process of adding an
impurity is called doping

9. Semiconductor component
 Transistors
 solar cells
 many kinds of diodes including
the light-emitting diode (LED)
 the silicon controlled rectifier
 photo-diodes
 digital and analog integrated
circuits

10. Semiconductor importance
 Semiconductors are
especially important as varying
conditions like temperature and
impurity content can easily change
their conductivity. The combination of
various semiconductor types
together generates devices with
special electrical properties, which
allow control of electrical signals.