Podcast
Questions and Answers
What is the relationship between electron density (n) and hole density (p) in an intrinsic semiconductor?
What is the relationship between electron density (n) and hole density (p) in an intrinsic semiconductor?
- n < p
- n = 0, p = ni
- n = p = ni (correct)
- n > p
Where is the Fermi level (EFi) located in an intrinsic semiconductor?
Where is the Fermi level (EFi) located in an intrinsic semiconductor?
- Near the middle of the forbidden band (correct)
- At the valence band edge
- Outside the energy gap
- At the conduction band edge
What happens to the Fermi level (EFi) if kT is significantly lower than the energy gap?
What happens to the Fermi level (EFi) if kT is significantly lower than the energy gap?
- Shifts close to the conduction band edge
- Becomes undefined
- Remains near the middle of the forbidden band (correct)
- Shifts close to the valence band edge
What type of semiconductor has a lower electron density but a higher hole density compared to an intrinsic semiconductor?
What type of semiconductor has a lower electron density but a higher hole density compared to an intrinsic semiconductor?
What are impurities called that lack one or several electrons to realize a full bonding with the rest of the crystal in a semiconductor?
What are impurities called that lack one or several electrons to realize a full bonding with the rest of the crystal in a semiconductor?
What type of impurity is intentionally added to a P-type semiconductor like silicon?
What type of impurity is intentionally added to a P-type semiconductor like silicon?
What is an intrinsic semiconductor?
What is an intrinsic semiconductor?
What role does doping play in semiconductor behavior?
What role does doping play in semiconductor behavior?
What is the role of the energy density of states N(E) in semiconductors?
What is the role of the energy density of states N(E) in semiconductors?
For a direct gap semiconductor, what is the effective mass of an electron in the crystal?
For a direct gap semiconductor, what is the effective mass of an electron in the crystal?
What does Nc(E) represent in semiconductors?
What does Nc(E) represent in semiconductors?
Intrinsic semiconductors differ from doped semiconductors mainly by:
Intrinsic semiconductors differ from doped semiconductors mainly by:
What is the most well-known material in semiconductor research?
What is the most well-known material in semiconductor research?
Which type of semiconductor consists of two different elements?
Which type of semiconductor consists of two different elements?
What type of device was germanium frequently used in before silicon took over?
What type of device was germanium frequently used in before silicon took over?
Which material was not suitable for applications requiring weak current consumption and high temperature operation?
Which material was not suitable for applications requiring weak current consumption and high temperature operation?
What type of semiconductors have electrical or optical properties that are not achievable with pure semiconductors?
What type of semiconductors have electrical or optical properties that are not achievable with pure semiconductors?
When did silicon start to overcome all other semiconductors?
When did silicon start to overcome all other semiconductors?
