3.5 Electrons At Work

Question 1

What is PhotoVoltaic Effect

Answer 1

When potential difference is produced when photons enter the layer between the p-type and n-type materials.

Question 2

What are Intrinsic/Pure Semiconductors

Answer 2

Semiconductors which have no impurities

Question 3

When do Intrinsic/Pure Semiconductors become insulators

Answer 3

When they hit 0 Kelvin

Question 4

What does having a higher temperature do in an intrinsic/pure semiconductors

Answer 4

They produce more electrons

Question 5

What are the three types of conductor

Answer 5

Conductor
Semiconductor
Insulator

Question 6

What is the Conductor only made of

Answer 6

The Conduction Band

Question 7

What is the Semiconductor made of

Answer 7

Conduction Band
Valence Band

Question 8

What is the insulator made of

Answer 8

Conduction Band
Valence Band

Question 9

What is the Band Gap of the Conductor

Answer 9

None

Question 10

What is the Band Gap of the SemiConductor

Answer 10

Small

Question 11

What is the Band Gap of the Insulator

Answer 11

Large

Question 12

Which Materials have the biggest Band Gap

Answer 12

Insulators

Question 13

What do n-type materials have more of

Answer 13

Extra electron energy levels

Question 14

What do p-type materials have more of

Answer 14

Extra hole energy levels

Question 15

What is an n-type semiconductor

Answer 15

When the majority of charge carries are negatively charged electrons in an electric field

Question 16

What is a p-type semiconductor

Answer 16

When the majority of charge carries positively charged holes in an electric field

Question 17

What group are n-type semiconductors part of

Answer 17

Group 5

Question 18

What group are p-type semiconductors part of

Answer 18

Group 3

Question 19

What are the n-type semiconductors known as

Answer 19

The Donor

Question 20

What are the p-type semiconductors known as

Answer 20

The acceptor

Question 21

What is the Band Gap also known as

Answer 21

The Fermi Level

Question 22

What happens when an electron leaves its position

Answer 22

Leaves a space that is positively charged known as a hole

Question 23

What is the lack of an electron known as

Answer 23

A positive hole

Question 24

What is a Doped/Extrinsic Semi Conductor

Answer 24

When a particle is added to the semiconductor

Question 25

What are the outcomes of a doped/Extrinsic Semi Conductor

Answer 25

An extra electron
A lack of electron Hole

Question 26

Steps for LED Band Theory

Answer 26

1.Electrons move towards R type conduction Band
2.Electron move from conduction band to the valence Band’s holes
3.Electrons enter hole which produces photons.

Question 27

In metals are the highest occupied energy band not completely full.

Answer 27

Yes