Question:
Carbon, silicon and germanium atoms have four valence electrons each. Their valence and conduction bands are separated by energy band gaps represented by (Eg)C , (Eg)Si and (Eg)Ge respectively. Which one of the following relationships is true in their case?
Carbon, silicon and germanium atoms have four valence electrons each. Their valence and conduction bands are separated by energy band gaps represented by (Eg)C , (Eg)Si and (Eg)Ge respectively. Which one of the following relationships is true in their case?
Updated On: Oct 10, 2023
(Eg)C >(Eg)Si
(Eg)C = (Eg)Si
(Eg)C < (Eg)Ge
(Eg)C < (Eg)Si
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The Correct Option is A
Solution and Explanation
For a particular element, germanium has the smallest energy band gap while carbon has the largest.
Therefore, the correct option is (A): (Eg)C > (Eg)Si
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Concepts Used:
Semiconductors
Semiconductors are a crystalline solid materials, whose electrical conductivity lies between a conductor and an insulator. Semiconductors are mainly used in the manufacturing of electronic devices like capacitors, transistors, diodes, Integrated circuits, etc.
Properties of Semiconductor:
- Semiconductor acts like an insulator at Zero Kelvin. On increasing the temperature, it works as a conductor.
- Due to their exceptional electrical properties, semiconductors can be modified by doping to make semiconductor devices suitable for energy conversion, switches, and amplifiers.
- Lesser power losses.
Uses of Semiconductor:
- Semiconductors are widely used in manufacturing electronics devices like transistors, diodes, sensors, integrated circuits.
- Semiconductors are widely used in all electronic devices, like mobile phones, digital cameras, communication devices, trains, ATMs, etc.