Consider a conventional NPN BJT with uniform doping. The base-emitter junction is forward biased, and the base-collector junction is reverse biased.
(a) Qualitatively sketch the energy band diagram.
(b) Sketch the minority carrier concentrations in the base. emitter. and collector regions.
(c) List all the causes contributing to the base and collector currents. You may neglect thermal recombination-generation currents in the depletion regions.