the dopant atoms in an _____________semiconductor have more electrons than the host material
Homework Answers
Dopant atoms are impurities which are added to semiconductor to improve its conductivity.
The dopant may have excess electron. In this they improve conductivity by providing free electrons.
The dopant may have less electron. In this they improve conductivity by providing free holes.
When electron is in excess, it is called N-Type semiconductor
Answer: n-type
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the dopant atoms in an _____________semiconductor have more electrons than the host material
what type of atoms can hold more than eight electrons and why?
what type of atoms can hold more than eight electrons and why?
Of the following atoms, ________ cannot accommodate more than 8 electrons? A. P B. As C....
Of the following atoms, ________ cannot accommodate more than 8 electrons? A. P B. As C. O D. S E. I
Calculate the concentration of excess electrons (or dopant concentration) in a n-type sample of silicon if...
Calculate the concentration of excess electrons (or dopant concentration) in a n-type sample of silicon if 10 out of every million silicon atoms is replaced by an arsenic atom (As). The density of silicon (Si) is 2.33 g/cm3 | x1022 m-3 ( 0.05 x1022 m?)
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QUESTION 6 - Host Influence on Ln3+ Photoluminescence (8 pts) a) Describe the importance of the host in the host/dopant concept applied for Ln3t-based phosphors. Based on this, generally speaking, what type of host materials would be favoured? b) The upconversion emission spectra given below are obtained on the same type of Ln** ions, yet doped into two different host materials (both samples are excited with the same 980 nm excitation source and both samples are dispersed in the same...
A silicon crystal is doped with Boron atoms with a dopant density of OSE+17 per cm...
A silicon crystal is doped with Boron atoms with a dopant density of OSE+17 per cm 3 An electric feld points from left to right. On an average, the free electrons in the silicon block (a) Move from left to right (b) Move from right to left (d) Do not move
2-0. If the orbitals of two atoms overlap and interact with constructive interference, the resulting increase...
2-0. If the orbitals of two atoms overlap and interact with constructive interference, the resulting increase in wave density results in an): a. bonding molecular orbital b. antibonding molecular orbital c. free radical formation d. cation formation Q-7. "Doping" pure silicon with gallium results in a(n) material. a. p-type b. n-type C. S-type d. d-type Q-8. You are likely to observe H-bonding in which of the following molecules? a. NaF b. C2H4F2 C. Na20 d. HF electrons than the host...
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15. A typical dopant concentration in a silicon device is about 1022 m3. (A) What is the ratio of the number of silicon atoms to the number of dopant atoms at this concentration? The density of silicon is 2.33 g/cm3. (B) If a manufacturing process requires that there be less than 1 uncontrolled impurity atom for every 1000 (controlled) dopant atoms, what is the allowable impurity concentration in parts per billion (1 ppb 1 impurity atom per billion silicon atoms)?...
Question 12 Alkenes and alkynes are called unsaturated compounds because Othey have more carbon atoms than...
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need help with the content 1a) Electrons in an atom are more stable than free electrons....
need help with the content
1a) Electrons in an atom are more stable than free electrons. This is why the energy levels of electrons in atoms are negative (free electrons are defined as having an energy of zera). Calculate the energy of a hydrogen. electron in the 4" shell, in J. b) Calculate this energy in kl/mole. 2. Calculate the energy for nu1, 2, 3, and 5 as well. Graph these energy levels in Joules, including n-5, in your lab...
why can hypovalent atoms hold less than eight electrons?
why can hypovalent atoms hold less than eight electrons?
Calculate the concentration of excess electrons (or dopant concentration) in a n-type sample of silicon if 10 out of every million silicon atoms is replaced by an arsenic atom (As). The density of silicon (Si) is 2.33 g/cm3 | x1022 m-3 ( 0.05 x1022 m?)
QUESTION 6 - Host Influence on Ln3+ Photoluminescence (8 pts) a) Describe the importance of the host in the host/dopant concept applied for Ln3t-based phosphors. Based on this, generally speaking, what type of host materials would be favoured? b) The upconversion emission spectra given below are obtained on the same type of Ln** ions, yet doped into two different host materials (both samples are excited with the same 980 nm excitation source and both samples are dispersed in the same...
A silicon crystal is doped with Boron atoms with a dopant density of OSE+17 per cm 3 An electric feld points from left to right. On an average, the free electrons in the silicon block (a) Move from left to right (b) Move from right to left (d) Do not move
2-0. If the orbitals of two atoms overlap and interact with constructive interference, the resulting increase in wave density results in an): a. bonding molecular orbital b. antibonding molecular orbital c. free radical formation d. cation formation Q-7. "Doping" pure silicon with gallium results in a(n) material. a. p-type b. n-type C. S-type d. d-type Q-8. You are likely to observe H-bonding in which of the following molecules? a. NaF b. C2H4F2 C. Na20 d. HF electrons than the host...
15. A typical dopant concentration in a silicon device is about 1022 m3. (A) What is the ratio of the number of silicon atoms to the number of dopant atoms at this concentration? The density of silicon is 2.33 g/cm3. (B) If a manufacturing process requires that there be less than 1 uncontrolled impurity atom for every 1000 (controlled) dopant atoms, what is the allowable impurity concentration in parts per billion (1 ppb 1 impurity atom per billion silicon atoms)?...
Question 12 Alkenes and alkynes are called unsaturated compounds because Othey have more carbon atoms than alkanes they have fewer carbon atoms than alkanes they have the maximum number of hydrogen atoms attached to each carbon in the compoun Othey have more hydrogen atoms attached to the carbon chain than alkanes they have fewer hydrogen atoms attached to the carbon chain than alkanes Which of the following contains Avogadro's number of atoms? O 39 g of potassium o 40 g...
need help with the content
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