The conductivity of intrinsic semiconductors, such as silicon and ger

The conductivity of intrinsic semiconductors, such as silicon and germanium, can be increased when small amounts of group 3A or group 5A elements are added, a process called doping. The resulting semiconductors are called either p-type or n-type semiconductors. Classify the type of doping condition and diagrams depicting the electron population of molecular orbital energy- level bands as p-type or n-type semiconductors. p-type semiconductors n-type semiconductors Solution Band diagram Ge doped with Al represents p - type semiconductor. As Al has only 3 electrons in its valence shell so it  provides holes as majority carrier in intrinsic Ge. Band diagram Ge doped with Sb represents an n - type semiconductor. As Sb has five e's in its valence shell so it provides e's as majority carrier in intrinsic Ge.