(a)
Interpretation:
The
Concept introduction:
The energy of a photon is given as
Where,
E is energy of photon.
H is Planck’s constant.
(b)
Interpretation:
The change in band gap when indium is substituted for gallium 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 is a type of doped semiconductor in which many free electrons are present in conduction band.
p-type: This is a type of doped semiconductor in which holes are present in conduction band.
Want to see the full answer?
Check out a sample textbook solutionChapter 21 Solutions
General Chemistry: Atoms First
- Sketch the structure of how the silicon atoms in the mineral hedenbergite, FeCaSi2O6, are connected to oxygen atoms.arrow_forward(a) (i) (ii) (iii) With the aid of a simple schematic, explain what covalent bonding is and how it is formed. What are the differences between a covalent bond and an ionic bond? Which type of bond is found in crystalline silicon? At room temperature do you expect an ionic crystal to be a good electrical conductor or a good electrical insulator? Explain why.arrow_forward#9. Conductor nanoparticle: The metal-to-semiconductor transition What diameter does a silver particle (a perfect sphere) achieve quantum confinement at room temperature (25°C)? A silver atom has the electronic configuration [Kr]4d105s', giving one valence electrons. The density of solid silver is 10.49 g/cm. Its atomic mass is 108 g/mol. The silver Fermi energy is 5.49 ev.arrow_forward
- 9. Assume that you have these materials: a) Li (s); b) Br2 (I); Ge (s) and d) Si(s). Choose the best electrical conductor among them and explain why.arrow_forwardwhat is the difference between ferromagnetic and paramagnetic?arrow_forwardQ2: Complete the following: 1. Freeze-out pheromone is 2. A compensated semiconductor can be formed by 3. If Germanium material (n = 2.4 x 10¹3 cm) was doped by 106 cm-3 of phosphorous atoms and 104cm of Indium, then, the electron concentration is) ********** 4., each donor level has two quantum states, due to 5. The generation carriers' process in semiconductors is caused by and......arrow_forward
- Using the empirical formula Co(H2O)3(SCN)2CI, draw the structures of TWO Linkage isomers (3 compounds possible; do not name the compounds) OR TWO lonization isomers (2 compounds possible) I.arrow_forwardWhich phosphorus nitride NP ,NP^+or NP^2- would be paramagneticarrow_forward1) Write a short essay on the classification of nanomaterials based on structure, size and phasearrow_forward
- (1) Diamond and graphite are two minerals with identical chemical compositions, pure carbon (C). Diamond is the hardest of all minerals, and graphite is one of the softest. If their compositions are identical, why do they have such profound differences in physical properties? (2) silicon and oxygen together make up nearly 75 percent by weight of the Earth's crust. But silicate minerals make up more than 95 percent of the crust. Explain the apparent discrepancy. (3) If you were given a crystal of diamond and another of quartz, how would you tell which is diamond? (4) Would you expect minerais found on the Moon, Mars, or Venus to be different from those of the Earth's crust? Explain your answer. (5) Quartz is Si02. Why does no mineral exist with the composition Si03?arrow_forward2. What is the coordination number structure formed by most semiconductors and electronic materials (GaAs, Cds)arrow_forwardestimate the fraction of electrons above fermi level in sodium and copper at room temperaturearrow_forward
- Chemistry for Engineering StudentsChemistryISBN:9781337398909Author:Lawrence S. Brown, Tom HolmePublisher:Cengage LearningChemistry: Principles and PracticeChemistryISBN:9780534420123Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward MercerPublisher:Cengage Learning