Carbon, silicon and germanium have four valence electrons each. These are characterised by valence and conduction bands separated by energy band gap respectively equal to \((E_g)_C, (E_g)_{Si}\) and \((E_g)_{Ge}\). Which of the following statements is true?
Carbon, silicon and germanium have four valence electrons each. These are characterised by valence and conduction bands separated by energy band gap respectively equal to \((E_g)_C, (E_g)_{Si}\) and \((E_g)_{Ge}\). Which of the following statements is true?
\((E_g)_{Si} < (E_g)_{Ge} < (E_g)_C\)
\((E_g)_C < (E_g)_{Ge} > (E_g)_{Si}\)
\((E_g)_C > (E_g)_{Si} > (E_g)_{Ge}\)
\((E_g)_C = (E_g)_{Si} = (E_g)_{Ge}\)
The Correct Option is C
Solution and Explanation
For given three elements, he energy band gap of carbon is the maximum and that of germanium is the least. The energy band gap of these elements are related as:\( (E_g)_C > (E_g)_{Si} > (E_g)_{Ge}\)
Therefore, the correct statement is (c).
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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.