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Electrical Engineering Question 4/8/24, 4:41 AM Quiz: Assignment-5 Electroluminescence emission from GaAs in thermal equilibrium and under injection Assignment-5 Electroluminescence emission from GaAs in thermal equilibrium and under injection Started: Apr 8 at 4:41am Quiz Instructions The equations were solved in Lecture-17. Your task is to provide a detailed answer, explaining each step of the solution process.  Question 1 1 pts Photon Emission from GaAs in Thermal Equilibrium. At room temperature, the intrinsic concentration of electrons and holes in GaAs is ni 1.8 x 106 cm-3. The radiative electron-hole recombination coefficient rr 10-10 cm3/s under certain conditions. Find the following: 1. The electroluminescence rate ( photon flux concentration) (photons/cm3-s). 2. The photon-flux density ϕ (photons/cm2-s) for a 2-micrometer-thick layer of GaAs. 3. The emitted intensity (W/cm2). Edit 12pt View Insert Format Tools Table Paragraph p 0 words  Question 2 1 pts https://fit.instructure.com/courses/638550/quizzes/1008663/take 1/3 4/8/24, 4:41 AM Quiz: Assignment-5 Electroluminescence emission from GaAs in thermal equilibrium and under injection Under certain conditions, τ = 50 ns and ηi = 0.5 for GaAs, so that a steady-state excess concentration of injected electron-hole pairs Δn = 10 17 cm -3. Find the following: 1. The photon flux concentration ( photons/cm3 -s). 2. The photon-flux density ϕ (photons/cm2-s) for a 2-micrometer-thick layer of GaAs 3. The optical power density (W/cm3) for photons at the bandgap energy Eg = 1.42 eV. 4. The optical intensity in (W /cm2 )for a 2-μm-thick slab of GaAs 5. The power emitted from a device of area 200μm x 10μm. Edit 12pt View Insert Format Tools Table Paragraph p 0 words  Question 3 1 pts Compare the results for electroluminescence emission from GaAs in thermal equilibrium and under injection conditions. Describe the differences in your own words. Edit 12pt View Insert Format Tools Table Paragraph https://fit.instructure.com/courses/638550/quizzes/1008663/take 2/3 4/8/24, 4:41 AM Quiz: Assignment-5 Electroluminescence emission from GaAs in thermal equilibrium and under injection p 0 words Not saved https://fit.instructure.com/courses/638550/quizzes/1008663/take Submit Quiz 3/3

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