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Rishav sapahi
- 19
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why p type semiconductor is electrically neutral and what is the concept of drift current?
why p type semiconductor is electrically neutral
Rishav sapahi said:But they have holes greater in number then electrons so it will not affect its neutrality and will make it positive in nature
Studiot said:Semiconductors are made of atoms.
All atoms are electrically neutral.
Do you understand why?
A p type semiconductor is electrically neutral because it contains an equal number of positively charged holes (created by the addition of dopant atoms) and negatively charged electrons. This balance of charges results in a net charge of zero, making the semiconductor electrically neutral.
The addition of dopant atoms (such as boron or gallium) in a p type semiconductor creates an imbalance in the number of electrons and holes. However, as the dopant atoms substitute for some of the original atoms in the semiconductor crystal lattice, they also create holes. This results in an equal number of electrons and holes, making the semiconductor electrically neutral.
Yes, a p type semiconductor can still conduct electricity even though it is electrically neutral. This is because the holes and electrons in the semiconductor can move freely and carry electric current. The presence of both positive and negative charges allows for the movement of charge and the flow of electricity.
The electric neutrality of a p type semiconductor does not affect its band structure significantly. The band structure of a semiconductor is determined by the energy levels of its electrons, and the addition of dopant atoms does not alter these energy levels. However, the presence of dopant atoms can create additional energy levels within the band gap, which can influence the conductivity and other properties of the semiconductor.
The electric neutrality of a p type semiconductor is crucial for its use in electronic devices. The balance of positive and negative charges allows for the creation of a depletion region at the p-n junction, which is necessary for the functioning of diodes, transistors, and other electronic components. Furthermore, the ability of a p type semiconductor to conduct electricity while remaining electrically neutral makes it a valuable material for various applications in electronics.