Question
Download Solution PDFWhich of the following impurity added to Silicon will give a p-type semiconductor?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFCONCEPT:
- Semiconductors: The materials that have a conductivity between conductors and insulators are called semiconductors.
- Doping: The conductivity of semiconductors is improved by adding suitable atoms called impurities and this process is called doping.
- n-type semiconductor: A n-type semiconductor is produced by doping a 14 group element with a 15 group element.
- p-type semiconductor: A p-type semiconductor is produced by doping a 14 group element with a 13 group element.
- 13 group element has 3 valence electron whereas that of group 15 has 5 valence electron.
EXPLANATION:
- According to the definition of the p-type semiconductor, a p-type semiconductor is produced by doping a 14 group element with a 13 group element.
- Doping Aluminum with Silicon forms a p-type semiconductor because Silicon is a 14 group element and Aluminum is a 13 group element.
- Nitrogen, Phosphorous, Bismuth are 15 group elements. So they will give n-type semiconductors.
- So the correct answer is option 3.
Additional Information
| 13th Group Elements | 14th Group Elements | 15th Group Elements |
| Boron | Carbon | Nitrogen |
| Aluminum | Silicon | Phosphorus |
| Gallium | Germanium | Arsenic |
| indium | tin | Antimony |
| Thallium | Led | Bismuth |
Last updated on Jul 4, 2025
-> The Indian Coast Guard Navik GD Application Correction Window is open now. Candidates can make the changes in the Application Forms through the link provided on the official website of the Indian Navy.
-> A total of 260 vacancies have been released through the Coast Guard Enrolled Personnel Test (CGEPT) for the 01/2026 and 02/2026 batch.
-> Candidates can apply online from 11th to 25th June 2025.
-> Candidates who have completed their 10+2 with Maths and Physics are eligible for this post.
-> Candidates must go through the Indian Coast Guard Navik GD previous year papers.