Diode

1. INTRODUCTION Evac This piece of work is the further investigation of the 3B5 - Schottky prohibition rectifying valve (SBD) experiment. It involves a comprehensive data error psychoanalysis to some(prenominal) the stabbing 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 utterance and their differences are discussed. Further analysis on the non-ideal behaviours of two the SBD and p-n uniting diodes are performed as well. Metal e? m EF n- geek semiconducting material Evac e?sc e?sc Ec EF Ev Figure 1 Band diagram of metal and n-type semiconductor when they are not in contact The SBD demonstrates a rectifying found by taking advantage of its metal-semiconductor conjunctive. 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, both band diagrams for a metal and an n-type semiconductor are provided. onward they are brought together into contact, they have independent band conformity and the uppermost energy band is the one for vacuum, Evac, which essentially tag the energy take for the electrons to go be yond the material 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 feature film of the typical band structures is the fermi level EF for metal is land 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, ensnare it on our website: OrderCustomPaper.com

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