Lesson: Chapter 11 — Electronics

11.1. Semiconductors 3 of 3

Intrinsic semiconductors and temperature

Intrinsic semiconductors

Pure crystalline semiconductors such as silicon and germanium are intrinsic semiconductors.

Metals when heated

The free electrons' random motion increases and gets in the way of a current in one direction.

Conductivity falls; resistance rises.

Semiconductors when heated

More bonds break, making more holes and free electrons.

Conductivity rises; resistance falls.