# JEE Main & Advanced Physics Semiconducting Devices N-Type Semiconductor

N-Type Semiconductor

Category : JEE Main & Advanced

These are obtained by adding a small amount of pentavalent impurity to a pure sample of semiconductor (Ge).

(1) Majority charge carriers - electrons Minority charge carriers - holes

(2) ${{n}_{e}}>>{{n}_{h}};\,\,{{i}_{e}}>>{{i}_{h}}$

(3) Conductivity $\sigma \approx {{n}_{e}}{{\mu }_{e}}\,e$

(4) N-type semiconductor is electrically neutral (not negatively charged)

(5) Impurity is called Donar impurity because one impurity atom generate one electron.

(6) Donor energy level lies just below the conduction band.

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