Class 12 Chemistry The Solid State Application of Semiconductors

Applications of n-type and p-type semiconductors

  • n-type and p-type semiconductors finds a great use in manufacturing electronic components.
  • Diode is a combination of n-type and p-type semiconductors extensively used as a rectifier.
  • Transistors are manufactured by keeping a layer of one type of semiconductor between two layers of another type of semiconductor.
  • npn and pnp type of transistors are used to detect or amplify radio or audio signals.
  • The solar cell is an efficient photo-diode used for conversion of light energy into electrical energy.
  • Gallium arsenide (GaAs) semiconductors have very fast response and have transformed the design of semiconductor devices.
  • Transition metal oxides show marked differences in electrical properties.
  • TiO, CrO2 and ReO3 behave like metals.
  • Rhenium oxide, ReO3 resembles metallic copper in terms of its conductivity and appearance.
  • Certain other oxides like VO, VO2, VO3 and TiO3 exhibit metallic or insulating properties depending on temperature.

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