Diode

1. INTRODUCTION Evac This piece of work is the further investigation of the 3B5 - Schottky rampart rectifying valve (SBD) experiment. It involves a comprehensive data error psychoanalysis to some(prenominal) the primitive data from the experiment and the parameters derived from them. An in-depth probe to the SBD is also done by examining the fundamental theory of SBD with illustrative band plots and reference to the thermionic emission theory. The ideal SBD beat is then compared with common p-n sound and their differences are discussed. Further analysis on the non-ideal behaviours of some(prenominal) the SBD and p-n continuative diodes are performed as well. Metal e? m EF n- theatrical role semiconducting material Evac e?sc e?sc Ec EF Ev Figure 1 Band diagram of metal and n-type semiconducting material when they are not in contact The SBD demonstrates a rectifying take by taking advantage of its metal-semiconductor alignment. This is basically a junction that is made by contacting a metal surface with a doped semiconductor together. Cases may vary according to the type of doping for the semiconductor and for convenience, merely n-type doped semiconductor would be discussed in this work, and the situation for p-type counterparts is simply the opposite.

As showed in figure 1, devil band diagrams for a metal and an n-type semiconductor are provided. sooner they are brought together into contact, they have independent band conformity and the uppermost energy band is the one for vacuum, Evac, which essentially mark the energy take for the electrons to go beyond the ma! terial surface, emitted into the vacuum. Intuitively, the Evac for both the materials should be at the same level and the work functions ?m, ?sc and electron affinity for the semiconductor ?sc has been marked. Another device characteristic of the typical band structures is the fermi level EF for metal is spurn than that of the semiconductor, i.e., as can teach from the diagram. Thus, when these two materials are in contact with each...If you want to get a full essay, grade it on our website: OrderCustomPaper.com

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