Conduction in Semiconductors

Question 1

allow or stop
current to flow.

Answer 1

Semiconductors

Question 2

-also called conduction electrons,

Answer 2

Free Electrons

Question 3

are
valence electrons that have acquired enough energy to
escape from the valence band

Answer 3

Free Electrons

Question 4

-vacancy in the valence band when ionization
happens or when a free electron is excited

Answer 4

Holes

Question 5

-for every electron in the conduction
band there is one hole left in the valence band, creating
an

Answer 5

Electron-Hole Pair

Question 6

-occurs when a free electron losses
energy and falls back to the hole in the conduction band

Answer 6

Recombination

Question 7

An ________ of a semiconductor can
result in a substantial _______ in a material.

Answer 7

increase in temperature, increase in the number of free
electrons

Question 8

Semiconductor material such as Germanium and
Silicon that show a reduction in resistance with
increase in temperature are said to have

Answer 8

negative
temperature coefficient.