Question

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 semiconductor

The 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 1

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.