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The materials that are used in the construction of point contact diode are _________

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The materials that are used in the construction of point contact diode are _________

(a) Silicon

(b) SnTe or Bi2Te3

(c) GaS or CdS

(d) HgI

This question was addressed to me by my college professor while I was bunking the class.

My question is taken from The Point Contact Diode in chapter Semiconductor-Diode Characteristics of Electronic Devices & Circuits

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Right option is (b) SnTe or Bi2Te3

Explanation: The diode base of SnTe or Bi2Te3 is highly detection sensitive. They are mechanically stable over long periods of use either as harmonic generators or mixers. They are emphasized in the 2-200THz region.

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