電子器件金半接觸ppt課件-wenkub
2023-05-16 18:00:30 本頁面
【正文】 heterojunction/異質(zhì)結(jié) EHP 電子空穴對 homojunction/同質(zhì)結(jié) Schottky barrier /肖特基勢壘 barrier height/勢壘高度 ideal/理想的 work function/功函數(shù) practical/實際的 electron affinity/電子親和能 Fermi level/費米能級 rectifier /整流器 electrostatic potential/靜電勢 breakdown /擊穿 rectifying contacts/整流接觸 Ohmic contacts/歐姆接觸 surface state/表面態(tài) latticematched/晶格匹配的 tunneling effect/隧道效應(yīng) 半導(dǎo)體器件工作的基本方程 泊松方程 電流密度方程 電流連續(xù)性方程 pppnnnpnpppnnnADsJqRGtpJqRGtnJJJpqDqpJnqDqnJnpNNqrr????????????????????????????????11)()()(02???????????Many of the useful properties of a pn junction can be achieved by simply forming an appropriate metalsemiconductor(MS) contact. MetalSemiconductor junctions or contacts(金屬 半導(dǎo)體結(jié)、金 半接觸） Schottky Barriers ? Possibly, in retrospect, Schottky39。 in the case of the metalvacuum interface, this is sometimes called a SchottkyNordheim barrier. In many contexts, h has to be taken equal to the local work function φ. ? This SchottkyNordheim barrier (SN barrier) has played in important role in the theories of thermionic emission and of field electron emission. Applying the field causes lowering of the barrier, and thus enhances the emission current in thermionic emission. This is called the Schottky effect, and the resulting emission regime is called Schottky emission. xee F xhxM r??? 02 4/)( ????The work function(功函數(shù) ): The energy with the work function is required to remove an electron at the Fermi level to the vacuum outside the metal.(Al=) ?the electron affinity(電子親和能 ): The energy with t
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