A Schottky diode needs to be fabricated by deposition of a s

A Schottky diode needs to be fabricated by deposition of a suitable metal on an n-type Si doped at a concentration of 2.33×1014 cm-3 as shown in the figure. Work function of various metals are listed in the table below.

AL        Ni          Ag     Au      Pt      Ti      Mo       Cr       Fe    Cu     Co

4.3 5.1    4.3 5.1 5.3 4.3    4.4 4.5 4.7    4.6 5.0                                                                                                                                                                                                                                                                                      (a) List the metals from the table which can NOT be used to fabricate a Schottky diode. Explain your answer with necessary calculations.

(b) Which metal would you chose to fabricate a Schottky diode with highest Schottky barrier height? Justify your answer. What would be the built-in potential in that diode?

(c) Draw band diagram of the Schottky diode (mark all energy levels).

Solution

where is the figure.and the above information is not clear