Pure Si at 500 K has equal no. of electron (n_e) and hole (n_h) concentrations of 1.5 ×10^16 m^-3. Doping by Indium increases n_h to 4.5 ×10^22 m^-3. Find the no. of electrons in the doped semiconductor and identify if it is p-type or n-type.

NEET PYQ, 12P14 Semiconductor Materials and Devices, p-type n-type semiconductor

Concept: Law of Mass Action: Product of no. of electrons and no. of holes is a constant.