What is the characteristic of p-type materials in terms of doping?

In p-type materials, doping typically involves adding elements such as boron, which have fewer valence electrons than the semiconductor material, usually silicon. This process creates "holes" in the material, which can be viewed as positive charge carriers. The characteristic of p-type materials is centered on these holes, which play a crucial role in conducting electricity.

The correct response highlights the presence of mobile holes that can conduct electricity without the need for external light exposure. In p-type semiconductors, the doping creates a greater concentration of these holes, enabling them to move freely and contribute to electrical conduction under normal conditions, without requiring illumination.

The other options relate to mobile electrons or mention light, which do not accurately represent the primary characteristic of p-type materials focused on hole mobility.