Material with a small band gap (≲ 3 eV) such that thermal or optical excitation promotes electrons from the valence to the conduction band, giving tunable conductivity. Doping with donors (n-type) or acceptors (p-type) controls carrier…
Material with a small band gap (≲ 3 eV) such that thermal or optical excitation promotes electrons from the valence to the conduction band, giving tunable conductivity. Doping with donors (n-type) or acceptors (p-type) controls carrier…