Name these substances that can be doped to improve efficiency and which are often based on germanium or silicon.
Calculations for the behavior of electrons in these substances assign the electrons an effective mass that varies inversely with the second derivative of the electric field and has nothing to do with actual mass. The two carriers in these materials cancel each other out during the recombination process. These substances used in photovoltaic cells typically have band gaps between 0.1 and 10 electron volts where no electrons can exist. Some of these materials conduct holes instead of electrons, and are known as p-type. Name these substances that can be doped to improve efficiency and which are often based on germanium or silicon.
Calculations for the behavior of electrons in these substances assign the electrons an effective mass that varies inversely with the second derivative of the electric field and has nothing to do with actual mass.
semiconductors