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Intrinsic semiconductors have small conductivity at the room temperature.
and also if we raise the temperature to increase their conductivity then they will start acting merely like a conductor. and there will not be any control over the directions or the magnitude of the current flowing through it.
so by mixing the suitable impurity(dopant) we obtain the extrinsic semiconductor.
so that the conductivity as well as the control over the current can be increased.
Although intrinsic semiconductor are also somwhere used in electronics where i high resistance layers or a separation layers b/t two systems is needed.
like in PIN diode.
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∙ 12y ago
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what is semiconductor state advantages of semiconductor devices over electronic tubes
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