Solid-State Chemical Sensors Are Manufactured Using Semiconductors Such as Si

question 6

Multiple Choice

Solid-state chemical sensors are manufactured using semiconductors such as Si and Ge.Doping enhances the conductivity of Si.Which is NOT true for doping of silicon?

• A)Doping replaces some of the silicon atoms with atoms of different elements.
• B)Doping silicon with phosphorous enhances silicon's conductivity by providing an extra conduction electron that is free to move through the crystal.
• C)Doping silicon with aluminum enhances silicon's conductivity by creating a vacancy in the crystal called a hole,which behaves as a negative charge carrier.
• D)n-type silicon has excess conduction electrons.
• E)p-type silicon has excess holes.

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