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  4. To a germanium crystal equal number of aluminium and indium atoms are added. Then

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Q. To a germanium crystal equal number of aluminium and indium atoms are added. Then

KCETKCET 2006Semiconductor Electronics: Materials Devices and Simple Circuits

Solution:

If trivalent impurity is mixed with pure germanium crystal, the crystal so obtained is called p-type semiconductor. Here, aluminium and indium atoms are trivalent impurity atoms