Quiz on Heterostructures and Semiconductor Physics

What is a hetero structure composed of?

• Organic compounds

• Only metals

• Two or more different semiconductors

• A single semiconductor

Which of the following is NOT a compound semiconductor?

• CdTe

• SiC

• Silicon

• GaAs

What is a key factor in the functionality of hetero structures?

• The temperature of the environment

• The interface between materials

• The size of the materials

• The color of the materials

What type of hetero junction is formed when the conduction band of the wide band gap material is higher than that of the narrow band gap material?

• Metal-Semiconductor junction

• pp Hetero junction

• nn Hetero junction

• pn Hetero junction

Which application is associated with pn hetero junctions?

• Schottky diodes

• Quantum dot lasers

• Light-emitting diodes

• High-electron-mobility transistors

What phenomenon does quantum mechanics help explain in hetero structures?

• Quantum confinement effects

• Thermal conductivity

• Magnetic properties

• Optical illusions

What is a Schottky barrier?

• A method of doping semiconductors

• An electrical barrier formed at a metal-semiconductor interface

• A type of laser

• A type of semiconductor

What does the work function refer to?

• The temperature at which a semiconductor operates

• The energy required to extract an electron from a material

• The size of the semiconductor crystal

• The speed of electrons in a semiconductor

What happens in the space charge region of a Schottky barrier?

• It becomes filled with majority carriers

• It generates heat

• It emits light

• It becomes depleted of majority carriers

Which of the following factors does NOT affect the Schottky barrier height?

• Metal work function

• Semiconductor properties

• Interface states

• Temperature of the environment