Uses for Type I, II and III Heterojunctions

[dualreal]

Hi, I've just learned about the type I (straddling gap), type II (staggered gap), type III (broken gap) heterojunctions. I know that the type I allows electron and hole confinement, that type II allows electron confinement, and confinement for type III varies on the external electric field supplied.

However, I'm still uncertain of how these electron-hole confinement properties make them useful in various semiconductor devices, such as solar cells, transistors, etc. I've tried researching on this, but have not come up with anything conclusive. Could I please receive some guidance in this?

 

[BigJDubs]

The electron-hole confinement properties of the different types of heterojunctions are useful in semiconductor devices because they help to optimize the device's performance. For example, type I heterojunctions are commonly used in solar cells because they provide a strong electric field for efficient charge separation and transport. Type II heterojunctions can be used to create high-performance transistors due to their ability to confine electrons and facilitate efficient current flow. Finally, type III heterojunctions can be used to control the electrical properties of materials, such as doping levels and bandgap engineering, allowing for improved performance in a variety of applications.