Physics - Chapter 14 - Semi Conductor Electronics - Materials, Devises And Simple Circuits

Front 1

Define Band Energy Gaps

Back 1

1. Energy Gap between the Valence bonds and Conduction bonds is known as Band Energy Gap
2. It is "0"ev for metallic conductors, less than "3'ev for semi conductors and greater than "3"ev for insulators
[e,v - electron volts]

Front 2

Define Valence Band and Conduction Band

Back 2

1. Electrons inside a crystal have different energy levels.
2. The different energy levels with continuous energy variation is called energy band
3. The energy band which includes the energy levels of valence electrons is called "valence bonds"
4. The bond with energy levels higher than valence electrons is called "conduction bond"

Front 3

Fermi Level

Back 3

Fermi Level is essentially the level half way between Conduction Band and Valence Band

Hint 3

Fermi Level is essentially the level half way between Conduction Band and Valence Band

Front 4

Chapter 14 - Page 509 - Q - 14.1

In an n-type silicon, which of the following statement is true:
(a) Elect rons are major i ty car r iers and t r ivalent atoms are the
dopants.
(b) Electrons are minority carriers and pentavalent atoms are the
dopants.
(c) Holes are minor i ty car r iers and pentavalent atoms are the
dopants.
(d) Holes are majority carriers and trivalent atoms are the dopants

Back 4

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