Semiconductor Physics - Talking Electronics

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In Used Band Description of of Temperature on on n-type andp-type and of Voltage across pn-Junction or Biasing a pn- Flow in a ForwardBiased Characteristics of in the Operating Con-ditions of pn-JunctionINTRINTRINTRINTRINTRODUCTIONO DUCTIONODUCTIONODUCTIONODUCTIONCertain substances like germanium, silicon, car-bon etc. are neither good conductors like cop-per nor insulators like glass. In other words,the resistivity of these materials lies inbetween conduc-tors and insulators. Such substances are classified assemiconductors. semiconductors have some usefulproperties and are being extensively used in electroniccircuits. For instance, transistor a Semiconductor de-vice is fast replacing bulky vacuum tubes in almost allapplications. Transistors are only one of the family ofsemiconductor devices ; many other semiconductordevices are becoming increasingly popular.

Semiconductor Physics 57 Fig. 5.1 shows the co-valent bonds among germanium atoms. A germanium atom has *4 valence electrons. It is the tendency of each germanium atom to have 8 electrons in the last orbit.

  Physics, Semiconductors, Semiconductor physics