Homework Answers
Add Answer to:
Help please
2. Consider an infinitely long block of p-Si (NA 101 cm3 at T 300...
2. A GaAs semiconductor at T 300 K is uniformly doped with NA 1016 cm3 and...
2. A GaAs semiconductor at T 300 K is uniformly doped with NA 1016 cm3 and No 0. The GaAs is illuminated with a light source at t = 0 s, resulting in a uniform generation rate of electron hole pairs g' 1020 cm . The electric field is zero. a) Give the analytic expression for the excess-carrier concentration δn(t) versus the time t>0s b) The steady state excess carrier concentration is found to be on( is the minority carrier...
6. A long p-type Si bar, NA-5x1016 cm3, is optically excited and creates a low level of steady st...
6. A long p-type Si bar, NA-5x1016 cm3, is optically excited and creates a low level of steady state excess carriers at on the left side of the bar (x-o) creating a quasi-Fermi level separation of (E-Fp)-0.42 eV. The carriers diffuse to the right and decay exponentially. Electron and hole lifetimes are both 5 μs Also, it is room temperature, D,-18 cm2/s, Dn-36 cm3/s, and n#1.5x1010 /cm? what is the electron . concentration and current density (A/cm2) at x 50...
3. Consider a long silicon pn junction photodiode at T-300 K with the following parameters:N.-2x1016 cm3...
3. Consider a long silicon pn junction photodiode at T-300 K with the following parameters:N.-2x1016 cm3 Nd 2x1o8 cm3 D.-25 cm2/s, D-10 cmis 2x10s Tpo-10's. Assume a reverse bias voltage of Vx-5 V is applied and assume a uniform generation rate of GL-1021 em's1 exists throughout the entire photodiode.Calculate the ratio of the prompt photocurrent density to the total steady state photocurrem density.
t=tau In a very long p-type Si bar with cross-sectional area = 0.1 cm2 and Na-1017...
t=tau
In a very long p-type Si bar with cross-sectional area = 0.1 cm2 and Na-1017 cm", we inject holes such that the steady excess hole concentration is 5 x 1016 cm3 at x 0. ed (a) What is the hole current? (b) How much is the excess stored hole charge? Assume μ,-500 cm2/V s and t,-10-10 s, L,- /Dptp
Problem 4 (25 points) Consider a silicon pn junction at T 300 K, NA ND-1x1016 cm3....
Problem 4 (25 points) Consider a silicon pn junction at T 300 K, NA ND-1x1016 cm3. The minority carrier lifetimes are τ -0.01 μs and τΡ 0.01 μ. The Junction is forwardbiased with , V,-0.6V. The minority carrier diffusion coefficients are D,-20 cm2/s, D,-10 cm2/s. n, = 1.5x 1010cm -3 Depletion region n-type p-type a) (10 points) Calculate the excess electron concentration as a function of x in the p side (see the figure above). b) (5 points) Calculate the...
7. a) A Si p-n junction has dopant concentrations Na = 2 x 1016/cm3 and Nd=1x1015/cm3 at T=300 K. Calculate (a) Vo, (b) W at VR=0 and VR=2 V and (c) the maximum electric field in the space charge regi...
7. a) A Si p-n junction has dopant concentrations Na = 2 x 1016/cm3 and Nd=1x1015/cm3 at T=300 K. Calculate (a) Vo, (b) W at VR=0 and VR=2 V and (c) the maximum electric field in the space charge region at VR=0 and VR=4 V. b) For the junction in part a, how much would the temperature need to increase to have V0 decrease by 1%?
5) A Si solar cell with junction cross sectional dimensions 2 cm ×2 cmis formed with Na 1018 cm3 on the p side and Nd 1018cm3 on the n side. It is operated at a temperature of 300 K and τn-tp-1 μ. a)...
5) A Si solar cell with junction cross sectional dimensions 2 cm ×2 cmis formed with Na 1018 cm3 on the p side and Nd 1018cm3 on the n side. It is operated at a temperature of 300 K and τn-tp-1 μ. a) Using the mobilities on the equation sheet, calculate the dark saturation current. b) An intrinsic region of thickness 200 μm is sandwiched between the p and n regions in order to enhance the active volume of the...
2. A GaAs semiconductor at T 300 K is uniformly doped with NA 1016 cm3 and No 0. The GaAs is illuminated with a light source at t = 0 s, resulting in a uniform generation rate of electron hole pairs g' 1020 cm . The electric field is zero. a) Give the analytic expression for the excess-carrier concentration δn(t) versus the time t>0s b) The steady state excess carrier concentration is found to be on( is the minority carrier...
6. A long p-type Si bar, NA-5x1016 cm3, is optically excited and creates a low level of steady state excess carriers at on the left side of the bar (x-o) creating a quasi-Fermi level separation of (E-Fp)-0.42 eV. The carriers diffuse to the right and decay exponentially. Electron and hole lifetimes are both 5 μs Also, it is room temperature, D,-18 cm2/s, Dn-36 cm3/s, and n#1.5x1010 /cm? what is the electron . concentration and current density (A/cm2) at x 50...
3. Consider a long silicon pn junction photodiode at T-300 K with the following parameters:N.-2x1016 cm3 Nd 2x1o8 cm3 D.-25 cm2/s, D-10 cmis 2x10s Tpo-10's. Assume a reverse bias voltage of Vx-5 V is applied and assume a uniform generation rate of GL-1021 em's1 exists throughout the entire photodiode.Calculate the ratio of the prompt photocurrent density to the total steady state photocurrem density.
t=tau
In a very long p-type Si bar with cross-sectional area = 0.1 cm2 and Na-1017 cm", we inject holes such that the steady excess hole concentration is 5 x 1016 cm3 at x 0. ed (a) What is the hole current? (b) How much is the excess stored hole charge? Assume μ,-500 cm2/V s and t,-10-10 s, L,- /Dptp
Problem 4 (25 points) Consider a silicon pn junction at T 300 K, NA ND-1x1016 cm3. The minority carrier lifetimes are τ -0.01 μs and τΡ 0.01 μ. The Junction is forwardbiased with , V,-0.6V. The minority carrier diffusion coefficients are D,-20 cm2/s, D,-10 cm2/s. n, = 1.5x 1010cm -3 Depletion region n-type p-type a) (10 points) Calculate the excess electron concentration as a function of x in the p side (see the figure above). b) (5 points) Calculate the...
5) A Si solar cell with junction cross sectional dimensions 2 cm ×2 cmis formed with Na 1018 cm3 on the p side and Nd 1018cm3 on the n side. It is operated at a temperature of 300 K and τn-tp-1 μ. a) Using the mobilities on the equation sheet, calculate the dark saturation current. b) An intrinsic region of thickness 200 μm is sandwiched between the p and n regions in order to enhance the active volume of the...
Most questions answered within 3 hours.
-
Where is the error in this code sequence?
String s1 = "Hello";
String s2 = "ello";...
asked 10 months ago -
Financial data for Joel de Paris, Inc., for last year
follow:
Joel de Paris, Inc.
Balance...
asked 10 months ago -
Consider this reaction:
Al2(SO4)3 (aq)+ BaCl3
(aq) Al2Cl6 (aq)- +
3BaSO4(s) . What is the...
asked 10 months ago -
Suppose that Savneet is considering increasing her
recent random sample from 20 car rentals to 40...
asked 10 months ago -
Trucks arrive at an unloading terminal at an average rate of 120
per hour.
Trucks arrive...
asked 10 months ago -
Why are methanol and ethanol completely soluble in water while
octanol is not very little soluble....
asked 10 months ago -
A facilities manager at a university reads in a research report
that the mean amount of...
asked 10 months ago -
When the CuSO4 is rehydrated by adding water to the anhydrous
compound, is this an endothermic...
asked 10 months ago -
A ray of sunlight is passing from diamond into crown glass; the
angle of incidence is...
asked 10 months ago -
A block of mass 0.249 kg is placed on top of a light, vertical
spring of...
asked 10 months ago -
how do the kidneys compensate in the presences of acidosis
a) trigger hyperventilate
b) reserve acid...
asked 10 months ago -
Question 501 pts
The rental rate of capital to the firm increases. Which of the
following...
asked 10 months ago