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Вы можете ознакомиться и скачать презентацию на тему Types of Semiconductors. Доклад-сообщение содержит 18 слайдов. Презентации для любого класса можно скачать бесплатно. Если материал и наш сайт презентаций Mypresentation Вам понравились – поделитесь им с друзьями с помощью социальных кнопок и добавьте в закладки в своем браузере.

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Intrinsic Semiconductor Semiconductor in pure form is known as Intrinsic Semiconductor. Ex. Pure Germanium, Pure Silicon. At room temp. no of electrons equal to no. of holes.

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Intrinsic semiconductor energy band diagram Fermi level lies in the middle

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Extrinsic Semiconductor When we add an impurity to pure semiconductor to increase the charge carriers then it becomes an Extrinsic Semiconductor. In extrinsic semiconductor without breaking the covalent bonds we can increase the charge carriers.

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Comparison of semiconductors Intrinsic Semiconductor 1. It is in pure form. 2. Holes and electrons are equal. 3. Fermi level lies in between valence and conduction Bands. 4. Ratio of majority and minority carriers is unity.

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Comparison between n-type and p-type semiconductors N-type Pentavalent impurities are added. Majority carriers are electrons. Minority carriers are holes. Fermi level is near the conduction band.

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N-type Semiconductor When we add a pentavalent impurity to pure semiconductor we get n-type semiconductor.

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P-type Semiconductor When we add a Trivalent impurity to pure semiconductor we get p-type semiconductor.

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In addition to this, some of the covalent bonds break due temperature and electron hole pairs generates. In addition to this, some of the covalent bonds break due temperature and electron hole pairs generates. Holes are majority carriers and electrons are minority carriers.

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P and N type Semiconductors

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Comparison of semiconductors Intrinsic Semiconductor It is in pure form. Holes and electrons are equal. Fermi level lies in between valence and conduction Bands.