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A semiconductor X is made by doping germanium crystal with arsenic (Z = 33). Second semiconductor Y is made by doping germanium with indium (Z = 49). The two are joined end to end and connected to a battery as shown. Which of the following statements is correct?
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- X is p-type, Y is n-type and the junction is forward biased
- X is n-type, Y is n-type and the junction is forward biased
- X is p-type, Y is n-type and the junction is reverse biased
- X is n-type, Y is p-type and the junction is reverse biased
Correct Option: D
From given figure
As here arsenic is pentavalent and indium is trivalent, so X is n-type semiconductor and Y is p-type semiconductor. Now, as n-side is connected to most positive supply and p-side is connected to most negative supply, therefore, the junction is reverse biased.
