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Why does an extrinsic semiconductor behave as an intrinsic semiconductor at elevated temperature?
Wiki User
∙ 14y ago
...It is due to the fact that at higher temperatures, the energy in the semiconductor is greater than Eg by a considerable amount, meaning that the conduction band is more full. At these high temperatures, the dopants' role on electron-hole pairs is negligible.
Wiki User
∙ 14y ago
Wiki User
∙ 11y agowe know that relation in semiconductor is
conductivity proportional to temp
especially in extrinsic semiconductor holes or electrons are charge carriers .
in extrinsic semiconductor when temp is increased then the energy of charge carriers also increases.
now kinetic energy equall to [ (1/2) m v^2 ]
in this M is constant
this implies energy prop to square of velocity
therefore if conductivity of charge carriers increases while increasing of temperature
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