Which semiconductor material conducts current better when doped?

Silicon is a widely used semiconductor material that exhibits enhanced conductivity when doped with specific impurities. Doping introduces additional charge carriers—either electrons or holes—into the silicon crystal structure. When silicon is doped with elements such as phosphorus (n-type doping), extra electrons are introduced, while doping with elements like boron (p-type doping) creates holes. This manipulation of the properties of silicon increases its conductivity significantly compared to its undoped state, making it ideal for use in various electronic components like transistors, diodes, and integrated circuits.

In contrast, materials like glass, copper, and wood do not function in the same manner as semiconductors. Glass is an insulator, copper is a conductor that does not rely on doping to enhance conductivity, and wood is also an insulator. Thus, the unique properties of silicon and its ability to have its conductive properties altered through doping processes make it the correct answer in this context.