What is doping ?

What is meant by 'doping' in a semiconductor?

What is meant by doping? Why is it done?

What is a hole? Which doping creates a hole?

What is meant by doping?Draw energy band diagram of a n-type semiconductor.

Suppose a 'n-type' wafer is created by doping Si crystal having 5xx10^(28) at oms//m^3 with 1ppm concentration of As. On the surface 220 ppm Boron is added to create 'P' region in this wafer. Considering n_i=1.5 xx 10^16m^-3 Calculate the densities of the charge carriers in the n and p regions.

What is biogas? What are its components ? What is the calorific value of biogas?

Define doping .Write two mehtods of dping?