Which of the following recombination processes typically results in the emission of a photon? A) R-G Center Recombination B) Auger Recombination C) Band-to-Band Recombination D) Recombination via Shallow Levels

C) Band-to-Band Recombination

Fill in the blank: The drift current density in a semiconductor is given by J_drift = q(nμ_n + pμ_p)E, where σ is the ______.

Conductivity

True or False: Carrier diffusion is driven by electric fields.

False. Carrier diffusion is driven by thermal energy and concentration gradients.

What is the relationship defined by the Einstein relation in semiconductors?

The relationship between the diffusion constant, mobility, and thermal voltage.

Riddle: I am the process that occurs when an electron in the valence band gets excited to the conduction band, creating a hole. What am I?

Band-to-Band Generation

Fill in the blank: The space charge density ρ in Poisson's equation is expressed as ρ = q(p - n + C), where C accounts for ______.

Charged impurities

Which process involves the creation of an electron-hole pair by losing energy to another high-energy electron? A) Band-to-Band Generation B) Auger Recombination C) R-G Center Recombination D) Recombination via Shallow Levels

B) Auger Recombination

True or False: The Fermi level in intrinsic semiconductors lies exactly at the midpoint of the bandgap.

True.

Fill in the blank: The Hall coefficient R_H is defined as R_H = ______.

1/ρ

What is the primary effect of increasing temperature on the intrinsic carrier concentration in semiconductors?

It increases the intrinsic carrier concentration.

MCQ: Which of the following materials is a compound semiconductor? A) Silicon B) Gallium Arsenide C) Germanium D) Copper

B) Gallium Arsenide

Fill in the blank: In an n-type semiconductor, the majority carriers are ______.

Electrons

True or False: The mobility of charge carriers is independent of temperature.

False. The mobility of charge carriers generally decreases with increasing temperature.

What is the term used to describe the energy gap between the conduction band and the valence band?

Forbidden energy gap

Riddle: I am a semiconductor's response to an electric field, proportional to the carrier concentration and mobility. What am I?

Drift current