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On doping germanium metal, with a little amount of indium, what does one get?(a) Intrinsic semiconductor(b) Insulator(c) n-type semiconductor(d) p-type semiconductorThe question was posed to me in quiz.The doubt is from Extrinsic Semiconductor topic in division Semiconductor Electronics : Materials, Devices and Simple Circuits of Physics – Class 12

Answer»

Correct choice is (d) p-type semiconductor

Best explanation: INDIUM IMPURITY in germanium PRODUCES p-type semiconductors. A trivalent impurity added to germanium produces a p-type semiconductor. Trivalent IMPURITIES such as boron, indium, and gallium are CALLED acceptor impurity.



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