What is the source of electrical energy in an artificial satellite?

In which one of the following devices, the light energy is converted into the electrical energy?

Solar energy is converted into electric energy through

Solar cell is a device that converts light energy into electrical energy. We obtain the highest output of energy during noon when the sun is just above our head, because

Which one of the following element is used in solar cells?

At absolute zero temperature, the electric resistance in semiconductor is-