(a)
Interpretation:
The energy band for molecular orbital and electron population of a semiconductor has to be drawn. Also higher electrical conductivity of semiconductor than insulator has to be explained.
Concept introduction:
Semiconductor: A material which can conduct electricity in range between a metal and an insulator is known as semiconductor. Addition of small amount of impurities increases conductivity of semiconductor and the process is known as doping. n-type and p-type are two types of doped semiconductors.
n-type: This type of doped semiconductor is the one in which many free electrons are present in conduction band.
p-type: This type of doped semiconductor is the one in which holes are present in conduction band.
(b)
Interpretation:
The energy band for molecular orbital and electron population of an insulator has to be drawn.
Concept introduction:
Insulator:
Insulators are the one in which electrons are filled in valence band with a vacant conduction band and they are parted away by band gap.
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General Chemistry: Atoms First
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- Sketch the band structure of a Li AND a Si crystal. (ii) How would you expect the electrical conductivity in Li AND Si crystals to vary with temperature? (iii) Account for the fact that the conductivity of Si is enhanced by the addition of small amounts of B.arrow_forwardWhich is not likely to lead to an increase in electrical conductivity?a. Increasing the temperature of a semiconductorb. Choosing a semiconductor with a smaller band gapc. Doping the semiconductord. All of the above would likely lead to an increase in electrical conductivity.arrow_forwardExplain how metallic conductors, semiconductors, and insulators are identified and explain their properties in terms of band theory. Why is graphite an electronic conductor and diamond an insulator?arrow_forward
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- Give information about the Nickel Arsenide structure (NiAs). For example: What kind of ionic solid is it, what are its coordination properties, and what is the cation/anion radius ratio? Give information.arrow_forwardAn ideal quantum dot for use in TVs does not contain anycadmium due to concerns about disposal. One potentialmaterial for this purpose is InP, which adopts the zincblende (ZnS) structure (face-centered cubic). The unit celledge length is 5.869 Å. (a) If the quantum dot is shaped likea cube, how many of each type of atom are there in a cubiccrystal with an edge length of 3.00 nm? 5.00 nm? (b) Ifone of the nanoparticles in part (a) emits blue light and theother emits orange light, which color is emitted by the crystalwith the 3.00-nm edge length? With the 5.00-nm edgelength?arrow_forwardWhat are n-type semiconductors?arrow_forward
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