In a semiconductor crystal, the atoms are held together by the interaction of valence electrons. What is the atomic number of silicon? Each atom in a silicon crystal has four valen... In a semiconductor crystal, the atoms are held together by the interaction of valence electrons. What is the atomic number of silicon? Each atom in a silicon crystal has four valence electrons. How are electron-hole pairs produced? What happens when a trivalent impurity is added to silicon? Discuss the purpose of a pentavalent impurity.
Understand the Problem
The question is about concepts related to semiconductors, including their atomic structure, electron behavior, and impurities. It examines how atoms in semiconductor crystals are held together, the role of valence electrons, and definitions of key terms in semiconductor physics.
Answer
Silicon: 14. Electron-hole pairs: thermal energy. Trivalent impurity: P-type. Pentavalent impurity: N-type.
The atomic number of silicon is 14. Electron-hole pairs are produced by thermal energy or photon absorption. Adding a trivalent impurity to silicon creates P-type semiconductors. A pentavalent impurity increases the number of free electrons, forming N-type semiconductors.
Answer for screen readers
The atomic number of silicon is 14. Electron-hole pairs are produced by thermal energy or photon absorption. Adding a trivalent impurity to silicon creates P-type semiconductors. A pentavalent impurity increases the number of free electrons, forming N-type semiconductors.
More Information
Electron-hole pairs, essential for semiconductor function, form through energy absorption, making materials conductive. Doping silicon changes its electrical properties, allowing for controlled conductivity in devices.
Tips
A common mistake is confusing P-type and N-type semiconductors. Remember: trivalent impurities create P-type (holes), pentavalent create N-type (extra electrons).
Sources
- In a semiconductor crystal the atoms are held - Course Hero - coursehero.com
- Understanding Semiconductors: Basics, Operation, and Applications - coursesidekick.com
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