Semi-Conductors Flashcards

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1
Q

What are the two types of Semi-Conductors?

A

Intrinsic & Extrinsic

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2
Q

What are the properties an Intrinsic S.C?

A

Has no impurities & #electrons = #holes

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3
Q

What are the properties an Extrinsic S.C?

A

Has impurities, & 2 types = N-type and P-type

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4
Q

What is the net charge on an N-type S.C?

A

Negative (N for negative)

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5
Q

What is the net charge on an P-type S.C?

A

Positive (P for positive)

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6
Q

In an N-type S.C how many valence electrons does the Dopant need to bond? Are there less or more holes?

A

Dopant needs to have more than > 4 valence electrons in order to bond. This results in less holes

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7
Q

In a P-type S.C how many valence electrons does the Dopant need to bond? Are there less or more holes?

A

Dopant needs to have less than < 4 valence electrons to bond. This results in more holes

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8
Q

Where is the Fermi lvl located in a N-type S.C?

A

Just under/below the Conduction Band

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9
Q

Where is the Fermi lvl located in a P-type S.C?

A

Just above the Valence Band

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10
Q

What is the Band Gap in a Semi-Conductor? **

A

Band Gap in Less than or equal to <= 3 eV

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11
Q

What happens at 0k in a Semi-Conductor?

A

Nothing works at 0k. At Temps > 0k, Conductivity = 0

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