Question:
Carbon, silicon and germanium have four valence electrons each. These are characterized valence and conduction bands separated by energy band gap respectively equal to $ {{(Eg)}_{C}},{{(Eg)}_{Si}} $ and $ {{(Eg)}_{Ge}} $ . Which of the following statements is true?
Carbon, silicon and germanium have four valence electrons each. These are characterized valence and conduction bands separated by energy band gap respectively equal to $ {{(Eg)}_{C}},{{(Eg)}_{Si}} $ and $ {{(Eg)}_{Ge}} $ . Which of the following statements is true?
Updated On: Jun 20, 2022
- $ {{(Eg)}_{C}}={{(Eg)}_{Si}}={{(Eg)}_{Ge}} $
- $ {{(Eg)}_{C}}>{{(Eg)}_{Si}}>{{(Eg)}_{Ge}} $
- $ {{(Eg)}_{C}}{{(Eg)}_{Si}} $
- $ {{(Eg)}_{Si}}{{(Eg)}_{C}} $
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The Correct Option is B
Solution and Explanation
Carbon , germanium (Ge) and silicon (Si) are semiconductros. They lie in 1VA group of periodic table.
$ {{(Eg)}_{C}}=5.2eV $ $ {{(Eg)}_{Ge}}=0.75eV $
$ {{(Eg)}_{Si}}=1.21eV $
Thus, it is obvious that
$ {{(Eg)}_{C}}>{{(Eg)}_{Si}}>{{(Eg)}_{Ge}} $
$ {{(Eg)}_{C}}=5.2eV $ $ {{(Eg)}_{Ge}}=0.75eV $
$ {{(Eg)}_{Si}}=1.21eV $
Thus, it is obvious that
$ {{(Eg)}_{C}}>{{(Eg)}_{Si}}>{{(Eg)}_{Ge}} $
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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.