In the interactive activity, the band shown at the top is the conduction band, a
ID: 512525 • Letter: I
Question
In the interactive activity, the band shown at the top is the conduction band, and the band shown at the bottom is the valence band. The valence band consists of bonding molecular orbitals that are filled with electrons, and the conduction band consists of vacant antibonding molecular orbitals. The red color indicates that the orbitals in that band are filled with electrons, and the blue color indicates that the orbitals in that band are empty. The space between the two bands shows the energy difference between them and is known as the band gap energy, or the band gap.
Which of the following statements are correct with respect to the band structure and the band gap of different materials at non-zero kelvin conditions?
Check all that apply.
The n-type semiconductor has a partially filled valence band.
When you add a controlled amount of substance known as an impurity to a pure semiconductor, its conductivity increases. This process is known as doping. The addition of an impurity can increase or decrease the number of available electrons. If the number of electrons is increased, the extra electrons conduct electricity. If the number of electrons is decreased, a vacant hole is created. The adjacent electron enters the vacant hole and conducts electricity. Thus, it seems like the holes act as charge carriers. They are considered to be positive charge carriers. Depending upon the charge carriers that conduct electricity, there are two types of semiconductors: p-type semiconductors and n-type semiconductors.
Which of the following statements are correct with respect to semiconductors?
Check all that apply.
Check all that apply.
The undoped semiconductor has a partially filled conduction band. The band gap of a semiconductor is less than that of an insulator. The p-type semiconductor has a partially empty conduction band. The p-type semiconductor has a partially empty valence band. The conduction band for insulators is always vacantThe n-type semiconductor has a partially filled valence band.
When you add a controlled amount of substance known as an impurity to a pure semiconductor, its conductivity increases. This process is known as doping. The addition of an impurity can increase or decrease the number of available electrons. If the number of electrons is increased, the extra electrons conduct electricity. If the number of electrons is decreased, a vacant hole is created. The adjacent electron enters the vacant hole and conducts electricity. Thus, it seems like the holes act as charge carriers. They are considered to be positive charge carriers. Depending upon the charge carriers that conduct electricity, there are two types of semiconductors: p-type semiconductors and n-type semiconductors.
Which of the following statements are correct with respect to semiconductors?
Check all that apply.
Check all that apply.
The conductivity of semiconductors can be increased by the doping process. As the temperature increases, the conductivity of semiconductors decreases. The addition of group 5A elements to group 4A semiconductors increases the conductivity of the group 4A semiconductors. Electrons are charge carriers in n-type semiconductors. Holes are charge carriers in p-type semiconductors. The addition of group 3A elements to group 4A semiconductors decreases the conductivity of the group 4A semiconductors. O Touch the material type to see band structure. Insulator Undoped Semiconductor Energy n-Type Semiconductor p-Type SemiconductorExplanation / Answer
Correct statements regarding the band structure and the band gap of different materials at non-zero kelvin conditions are,
The band gap for semiconductor is less than insulator
The conduction band for insulator is always vacant
The p-type semiconductor has partially filled valence band
Correct statements with respect to semiconductors are,
The conductivity of semiconductors can be increased by doping process
The addition of group 5A elements to group 4A semiconductors increases the conductivity of the group 4A semiconductors
Electrons are charge carriers in n-type semiconductors
Holes are charge carriers in p-type semiconductors
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