1. Basic Electronics (EC1101) Classification of Semiconductors
By: 1107_003
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2. TOPICS TO BE COVERED Classification of Semiconductors
Elemental semiconductors
Compound semiconductors
Intrinsic semiconductor
Doping
Extrinsic semiconductor

3. LEARNING OBJECTIVE Students should be able to:
Classify semiconductor material into different types
Explain doping
Differentiate between doping and dopants

4. CLASSIFICATION OF SEMICONDUCTORS
On the bases of composition:
i) Elemental semiconductors: Si and Ge
ii) Compound semiconductors:
Inorganic: GaAs, CdS, GaAsP, etc.
Organic: anthracene, doped pthalocyanines, etc.
Organic polymers: polypyrrole, polyaniline, polythiophene, etc.

5. CLASSIFICATION OF SEMICONDUCTORS
On the bases of the presence of added impurities:
i) Intrinsic semiconductors - Ge, Si
ii) Extrinsic semiconductors:
N-type: Pentavalent dopants - Sb, As & P
P-type: Trivalent dopants - B, Ga, and In

6. Classification of Semiconductors

7. REFERENCES Electronic Devices & Circuit Theory (11e)
by R. L. Boylestad & L. Nashelsky
of Pearson Education
Electronic Devices and Circuits (2e)
by B. P. Singh & R. Singh