Empty MOs Filled MOs Energy Band A Band B

Q: The first LEDs were made from GaAs, which has a bandgap of 1.43 eV. What wavelength of light would…

A: Unit of energy is converted as follows,

Q: The electronic structure of a doped semiconductor is shown here.  1.)Is this an example of an…

A: Semiconductors can be defined as the materials whose conductivity lie between metals and insulators.

Q: Account for the relative bandgap energies of semiconductors interms of periodic trends?

A: Semiconductors are materials which have a conductivity between conductors (generally metals) and…

Q: Define the term Interstitial alloys?

A: Alloy is a mixture of more than one metal which has superior properties than any individual metal.…

Q: Give tha explanation with diagram of polaron, bipolaron and soliton pair

A: In an ionic crystal, a conducting electron combines with and itself-induced polarization to form a…

Q: Indicate whether each statement is true or false:(a) The band gap of a semiconductor decreases as…

A: FALSE, As the particle size decreases, band gap of semiconductor increases.

Q: Explain what happens when a pure semiconductor made up of Silicon is doped with an Indium atom…

A:

Q: Which one of the following statements is true for the vulcanization? Risa procoess ge nerally…

A: Vulcanization is a chemical process that involves heating rubber at 140–160°C with sulphur,…

Q: Distinguish  between the bond thos exist  In CsCl and SiC Crystals.

A: Chemical Bond: Chemical bonds are type of forces which hold two or more than two atoms to form a…

Q: The minority carriers in p-type semiconductors are

A: Doping is the process by which conductivity of a semi conductor increases. When an element of group…

Q: There are four different types of band structures at 0 K. Among them, two are typified in metals,…

A: The solution is given below -

Q: How may the conductivity of an intrinsic semiconductor be increased?

A: The intrinsic semiconductor is a type of semiconductor which is pure semiconductor, which has no…

Q: If you want to dope GaAs to make a p-type semiconductorwith an element to replace As, which…

A: A p-type semiconductor is a type of semiconductor. When the trivalent impurity is added to an…

Q: How much dopant is present in 107 kgkg of semiconductor with a dopant concentration of 2.00 ppmppm…

A: Given: Mass of semiconductor = 107 Kg. And the concentration of dopant = 2.00 ppm by mass.

Q: Which of these statements is false?(a) As you go down column 4A in the periodic table, the…

A: As we go down the group 4A or group 14 in periodic table, the atomic size increases and the valence…

Q: Shown here are sketches of two processes. Which of theprocesses refers to the ductility of metals…

A: Metals show different physical properties, they are, Malleability: They can be beaten or hammered…

Q: Account for the following:(i) Schottky defects lower the density of related solids.(ii) Conductivity…

A: Density of the substance remains constant at a constant temperature. It is equal to the ratio of…

Q: In how many allotropic forms does arsenic exists?

A: Allotropes of an element are forms of the same element with different physical and chemical…

Q: Explain (i) The basis of similarities and differences between metallic and ionic crystals.

A: From given,  The basis of similarities and differences between metallic and ionic crystals is…

Q: arsenic is a suitable element for doping a pure semiconductor and convert it into an accept True or…

A: Doping is the process of adding impurities to intrinsic semiconductors to alter their properties.…

Q: The electronic structure of a doped semiconductor isshown here. (a) Which band, A or B, is the…

A: The bands closest to the fermi level are valence band and conduction band. The electrical…

Q: How are the Ceramics traditionally defined?

A: Traditional ceramic materials are gotten from normal, naturally happening crude materials. For…

Q: Define What is HIGH COPPER CONTENT ALLOYS? Also, what is its properties and applications?

A: Answer - According to the question - High Copper  content  Alloys are copper alloys, containing more…

Q: Which element produces a p-type semiconductor when doped into silicon?

A: Semiconductors are the materials that have a conductivity that lies between the conductors and…

Q: B) Calculate atomic weight for material which density is (6.4 g/cm) and atomic radius is (0.122 nm),…

A: Given  Density of material = 6.4 gm/cm3 Radius                    = 0.122 nm Atomic Weight = ? For…

Q: The unit cell of a compound containing Co and O has a unitcell shown below. The Co atoms are on the…

A: Since both the O atoms are completely inside the unit cell. Hence the contribution of both O to the…

Q: Explain how metallic conductors, semiconductors, and insulators are identified and explain their…

A:

Q: 6. What is the composition, in weight percent, of an alloy that consists of 6 at% Pb and 94 at% Sn?

A:

Q: Classify as n-type or p-type a semiconductor formed by doping (a) germanium with phosphorus, (b)…

A:

Q: The band gap energy of semiconductor LED is 3.0ev What is the wavelength of maximum corresponding…

A: Wavelength can be calculated using the given equation: E =  hcλ

Q: Indicate whether this statement is true or false:If you want a semiconductor that emits blue light,…

A: Conductors are the substance, which can conduct the electricity whereas insulators are the…

Q: Compare the hybridization of Si atoms in Si(s) with thatof C atoms in graphite (see Fig. 21.26). If…

A: Both Si and C atoms has 4 valance electrons in its outer most shell and both of these form covalent…

Q: Silicon has a band gap of 1.1 eV at room temperature.(a) What wavelength of light would a photon of…

A: As your question consists of multiple subparts, we are solving only the first two, to then get the…

Q: Q2. Give a list ONLY for the following items: 1. The main bases on which crystallographic systems…

A: We have asked to give only list for the item given and the answer to this question is given in…

Q: The semiconductor CdSe has a band gap of 1.74 eV. Whatwavelength of light would be emitted from an…

A: The semiconductor CdSe has a band gap of 1.74 eV. The wavelength of light that would be emitted from…

Q: Define the term Ceramics?

A: Ceramics are widely used materials these days. They can be used in a variety of ways. Initially, the…

Q: Q2. Calculate the planer density of planes (011) for BCC, and FCC crystal structures?

A: Planar density is defined as the number of atoms per unit area that is centered on a plane. So,…

Q: Use the band model to explain how it is possible for some materials to undergo a…

A:

Q: An increase in temperature causes most metals to undergothermal expansion, which means the volume of…

A: The volume (V) of the crystal is equal to the cube of edge length of the unit cell. Thus, if the…

Q: For each of the following pairs of semiconductors, whichone will have the larger band gap: (a) CdS…

A: Since the band gap is directly proportional to the electronegativity difference  Hence more the…

Q: In-band theory of bonding for solids, what is a bandgap? Howdoes the band gap differ in metals,…

A: Band gap refers to the distance between the valence band and conduction band. It represents the…