Question
Download Solution PDFWhich of the following 14th group element is not a semiconductor?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFCONCEPT:
- Semiconductors: The materials that have a conductivity between conductors and insulators are called semiconductors.
- Even though carbon lies in the same group of the periodic table as germanium and silicon, it is not a pure or an intrinsic semiconductor.
EXPLANATION:
- When the external voltage becomes greater than the value of the potential barrier for the diode the potential barriers opposition will be overcome and the current will start to flow. This is the conventional current.
- The potential barrier is approx 0.3 volts for germanium and 0.7 volts for silicon while for the carbon it is 7eV.
- This is far much higher for Carbon to make it a semiconductor that has lower forbidden energy gaps (Si and Ge).
- This is why Carbon is not a semiconductor.
- So the correct answer is option 1.
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