A 5-m long slab of p-type silicon of the type of b has been doped non-uniformly along the x-axis according to the profi le NA(x) 5 1014[1 1 103 exp(2xy(1 m)]/cm3 . Sketch NA(x) vs. x, and show that...

A 5-m long slab of p-type silicon of the type of b has been doped non-uniformly along the x-axis according to the profi le NA(x) 5 1014[1 1 103 exp(2xy(1 m)]/cm3 . Sketch NA(x) vs. x, and show that even if not part of any circuit, the slab possesses a nonzero internal electric fi eld E(x). Calculate E(0) and E(5 m). Hint: since the slab is not part of any circuit, in equilibrium it must have J(drift) 1 J(diff) 5 0.