*6.24 Consider the semiconductor described in Problem 6.19. Assume a constant electric field E, is applied in the +x direction. (a) Derive the expression for the steady-state excess electron concentration. (Assume the solution is of the form e.) (b) Plot ôn versus x for (i) E= 0 and (ii) E= 12 V/cm. (c) Explain the general characteristics of the two curves plotted in part (b).

Fig: 1