Semiconductor Doping and Types

Play an AI-generated podcast conversation about this lesson

What is the energy band formation that distinguishes semiconductors from conductors and insulators?

Fermi Energy gap (correct)

Valence band and conduction band

Valence band only

Conduction band only

Which type of semiconductor has an indirect band gap?

Intrinsic semiconductor

P-type semiconductor

N-type semiconductor (correct)

Extrinsic semiconductor

What type of semiconductor is formed by doping silicon with boron?

Intrinsic semiconductor

N-type semiconductor

P-type semiconductor (correct)

Extrinsic semiconductor

Which of the following is not a common defect in semiconductors?

Fermi defect Signup and view all the answers

What are the charge carriers in P-type semiconductors?

Holes only Signup and view all the answers

Which band theory concept describes the formation of molecular orbitals in semiconductors?

Bonding and Antibonding Orbitals Signup and view all the answers

What type of silicon is created when As is introduced as a dopant?

N-type silicon Signup and view all the answers

Which group of elements introduce holes and create P-type silicon when doped into the semiconductor?

Group III (B, Al) Signup and view all the answers

What do dopants like As and B introduce in a semiconductor material?

Conduction electrons Signup and view all the answers

Which type of semiconductors are characterized by the presence of dopants like As and B?

Extrinsic semiconductors Signup and view all the answers

What happens when donor or acceptor carrier concentration overwhelms the intrinsic carrier concentration in a semiconductor?

The semiconductor becomes extrinsic Signup and view all the answers

At what temperature are all the shallow dopants typically ionized in an extrinsic semiconductor?

~300 K Signup and view all the answers

What is the most advanced semiconductor technology among all semiconductor technologies?

Silicon Signup and view all the answers

What happens to bonds in a silicon lattice as temperature increases?

They break, generating electron-hole pairs Signup and view all the answers

Which group of elements are candidates for donors in semiconductors?

Phosphorous Signup and view all the answers

What type of semiconductor is GaAs?

N-type Signup and view all the answers

What can break bonds in a silicon lattice and create electron-hole pairs?

Thermal vibrations of atoms Signup and view all the answers

What are holes and electrons in the context of semiconductors?

Charge carriers Signup and view all the answers