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  4. To obtain a p-type germanium semiconductor, it must be doped with

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Q. To obtain a $p$-type germanium semiconductor, it must be doped with

AIPMTAIPMT 1997Semiconductor Electronics: Materials Devices and Simple Circuits

Solution:

In $p$ type germanium semiconductor, it must be doped with a trivalent impurity atom. Since indium is a third group member, therefore germanium must be doped in indium.