HAFIS P CUSAT ,KOCHI 9633730653

1. CONDUCTING POLYMERS
HAFIS P
S5 PS&E
CUSAT

2. CONDUCTING POLYMERS
Conducting polymers are those polymers which
Conduct electricity due to delocalization of π
electrons.
E.g- Polyacetylene, Polythiophene, Polyaniline
,Polypyrrole

3. Two conditions to be satisfied to become conductive
:
1. Presence of conjugated double bonds
2. Doping

4. PRESENCE OF CONJUGATED DOUBLE BONDS.
The first condition for this is that the
polymer consists of alternating single and
double bonds, called conjugated double
bonds.

5. DOPING
The second condition is that the plastic has to be disturbed - either
by removing electrons from (oxidation), or inserting them into
(reduction), the material.
There are two types of doping:
1-oxidation with halogen (or p-doping).
2- Reduction with alkali metal (called n-doping).
    
 xNaCHxNaCH
x
nn
    
 3
2
3
ICHI
x
CH nn

6. Factors that affect the conductivity
1-Denesity of charge carriers.
2- Thier mobility.
3-The direction.
4-presence of doping materials
5-Temperature.

7.  Transistors
 Light Emitting Diodes (LEDs)
 Lasers used in flat televisions
 Solar cells
 Displays in mobile telephones
 Mini-format television screens
Applications

8. REFERANCE
Conducting polymer –S Ramakshinan
conducting polymers properties and
application –Joe unsworth,Costa conn

9. THANK YOU