Materials of p-type and n-type.

1. WELCOME TO
PRESENTATION
Presented by :
Name : Pritam chandra shil
ID: 162-15-7882
Sce: B
Topic : P-type and N-type
materials

2. SEMICONDUCTORS
Semiconductors are materials whose
electrical properties lie between
Conductors and Insulators.
Ex : Silicon(Si) , Germanium(Ge)
 Two-types of semiconductor :
1. intrinsic semiconductor
2. extrinsic semiconductor

3. P-TYPE SEMICONDUCTOR
 A p-type material is one in which holes are
majority carriers i.e they are positively charged
materials (+++++++)
 Trivalent impurities
si
siB
si
si
Accepter
impurity
creates a
hole

4. N-TYPE SEMICONDUCTOR
 A p-type material is one in which electrons are
majority charge carriers i.e they are negatively
charged materials (- - - - - - )
 Pentavalent impurities
Sb
Si
Si
Si
Si
Donor impurity
contribute free
electrons

5. DIODES
Electronics devices created by bringing together a
p-type and n-type region within the same
semiconductors lattice.
Used : Rectifiers , LED etc.
Free
Electrons
Free
Holes
N-type P-type

6. THANK YOU !!