Properties of Semiconductors (Leaving Cert Engineering): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What position do semiconductors occupy in terms of electrical properties?
What position do semiconductors occupy in terms of electrical properties?
Between conductors and insulators
Which semiconductor material is the most widely used?
Which semiconductor material is the most widely used?
Silicon
What is the band gap in energy band theory?
What is the band gap in energy band theory?
Energy difference between valence and conduction bands
What is the approximate band gap size for semiconductors?
What is the approximate band gap size for semiconductors?
0.1-4 eV
What happens in the conduction band?
What happens in the conduction band?
Electrons move freely and conduct current
How does higher temperature affect semiconductor conductivity?
How does higher temperature affect semiconductor conductivity?
Increases conductivity significantly
What is a key characteristic of metals' band structure?
What is a key characteristic of metals' band structure?
Valence & conduction bands overlap
What is the purpose of doping semiconductors?
What is the purpose of doping semiconductors?
Add impurities to control properties
What type of elements are used to create n-type semiconductors?
What type of elements are used to create n-type semiconductors?
Pentavalent elements like phosphorus
How many outer electrons do trivalent acceptor atoms have?
How many outer electrons do trivalent acceptor atoms have?
3 outer electrons
What does 'n' stand for in n-type semiconductors?
What does 'n' stand for in n-type semiconductors?
Negative due to extra electrons
What purity level is required for silicon in integrated circuits?
What purity level is required for silicon in integrated circuits?
99.9999999% pure