Question:
In a semiconductor diode, the barrier potential offers opposition to only:
In a semiconductor diode, the barrier potential offers opposition to only:
Updated On: Jul 12, 2022
- majority carrier in both regions
- minority carrier in both regions
- free electrons in the n-region
- holes in the p-region
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The Correct Option is A
Solution and Explanation
When a semiconductor diode is formed, a depletion layer is formed across its junction. This depletion layer has negative charge in p-type crystal and positive charge in n-type crystal, thus acts as a potential barrier for charge carriers.
In p-region, holes are majority carriers (electrons are minority carriers) and in n- region electrons are majority carriers (holes are minority carriers). When an electron (majority carrier) from nregion, tries to cross the junction, the negative charge of the barrier (in p-region) opposes the electron (whereas helps the hole) and electron is stopped by this barrier's negative plate. Same happens with a hole in p-region. Hence, the potential barrier offers opposition to majority carriers in both regions.
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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.