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?
(Eg)C >(Eg)Si
(Eg)C = (Eg)Si
(Eg)C < (Eg)Ge
(Eg)C < (Eg)Si
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.