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Follow us at: https://plus.google.com/+tutorvista/ Check us out at http://www.tutorvista.com/content/physics/physics-iv/semiconductor-devices/semiconductor-devicesindex.php What is a Semiconductor On the basis of the relative values of the electrical conductivities and the resistivity, the solids can be classified into three categories as metal conductors, insulators and semi-conductors. The solids that have conductivity and the resistivity in between the conductors and insulators are called the semi-conductors.

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https://padlet.com/f2015025/fx7qb63qabea

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Intrinsic And Extrinsic Semi Conductors1

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Follow us at: https://plus.google.com/+tutorvista/ Check us out at http://www.tutorvista.com/content/physics/physics-iv/semiconductor-devices/intrinsic-semiconductors.php Intrinsic Semiconductor An intrinsic semiconductor is one, which is pure enough that impurities do not appreciably affect its electrical behavior. In this case, all carriers are created due to thermally or optically excited electrons from the full valence band into the empty conduction band.

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Valence Band, Conduction Band and Forbidden Energy Gap

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Ch. 1_Semiconductor - Flow of Electrons and Holes  Electronics  Physics

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Ch. 1_Recombination & Generation in Semiconductor (Animated)

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Ch. 1_ELECTRONS AND HOLES IN SEMICONDUCTORS

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impurity added into an intrinsic semiconductor

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Doping of a Semiconductor | Physics Video Tutorials

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Doping a semiconductor Electrons and holes can be generated in a semiconductor crystal with heat energy or light energy. But in these cases, the conductivity remains very low. The efficient and convenient method of generating free electrons and holes is to add very small amount of selected impurity inside the crystal.