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caoyn2588銀蟲(chóng) (小有名氣)
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[交流]
【求助】P在Si中的作用?
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Assume that the concentration of P atoms required in a silicon crystal is 10^17atoms/cm^3. Compare the concentrations of atoms in silicon and the concentrations of P atoms. What is the significance of these numbers from a technological viewpoint? Assume that density of silicon is 2.33g/cm^3. 請(qǐng)高手指點(diǎn):P在Si中的作用? |
木蟲(chóng) (小有名氣)
銀蟲(chóng) (小有名氣)
銀蟲(chóng) (小有名氣)
銅蟲(chóng) (小有名氣)

木蟲(chóng) (小有名氣)
鐵蟲(chóng) (小有名氣)
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P核外有5個(gè)電子,Si有4個(gè)電子,把P摻雜到Si里面,Si里電子濃度增高,表現(xiàn)負(fù)性。 n-type semiconductors are made from crystalline sillicon that has been 'doped' with tiny quantities of an impurity (usually phosphorus) in such a way that the doped material prossesses a surplus of free electrons. Electrons are sub-atomic particles with a negative electrical charge, so silicon doped in this way is known as an n(negative)-type semiconductor. |
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有尾巴的青蛙

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有尾巴的青蛙

銀蟲(chóng) (小有名氣)
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