Question
Download Solution PDFMajority carriers of P type material
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFP-type semiconductor:
- Extrinsic P-type Semiconductor is formed when a trivalent impurity is added to a pure semiconductor
- Example of trivalent impurity are Boron, Gallium, and Indium
- Trivalent impurity like boron has 3 valence electrons.
- Each atom of the impurity fits in the silicon crystal by forming covalent bonds with the surrounding silicon atoms
- The dopant boron atom has one less electron than surrounding silicon and thus vacancy is generated that acts as a hole.
- Therefore, holes are in majority in the p-type semiconductors.
Pentavalent impurities:
Impurity atoms with 5 valence electrons produce n-type semiconductors by contributing an extra electron.
This is as explained in the figure:
Last updated on May 28, 2025
-> ISRO Technician recruitment notification 2025 has been released.
-> Candidates can apply for the ISRO recruitment 2025 for Technicians from June 2.
-> A total of 64 vacancies are announced for the recruitment of Technician.
-> The selection of the candidates is based on their performance in the Written Exam and Skill Test.
-> Candidates who want a successful selection must refer to the ISRO Technician Previous Year Papers to increase their chances of selection for the Technician post.