Q4) A semiconductor photodetector is sensitive to visible red light (has about 650 nm wavelength). a) What is the max. value of its bandgap energy? b) If 0,2 cm2 area of this semiconductor is illuminated with red light whose intensity is 3 mW/cm2, what is the # of electron-hole pairs generated per second? (Assume that each photon generates one EHP.) c) Calculate the initial wavelength of photons which are emitted from Si crystal as a result of e-h recombination. Is it in the visible range?
Q4) A semiconductor photodetector is sensitive to visible red light (has about 650 nm wavelength). a) What is the max. value of its bandgap energy? b) If 0,2 cm2 area of this semiconductor is illuminated with red light whose intensity is 3 mW/cm2, what is the # of electron-hole pairs generated per second? (Assume that each photon generates one EHP.) c) Calculate the initial wavelength of photons which are emitted from Si crystal as a result of e-h recombination. Is it in the visible range?
Introductory Circuit Analysis (13th Edition)
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ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
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![Q4) A semiconductor photodetector is sensitive to visible red light (has about 650 nm
wavelength).
a) What is the max. value of its bandgap energy?
b) If 0,2 cm2 area of this semiconductor is illuminated with red light whose intensity is 3
mW/cm2, what is the # of electron-hole pairs generated per second? (Assume that each photon
generates one EHP.)
c) Calculate the initial wavelength of photons which are emitted from Si crystal as a result of
e-h recombination. Is it in the visible range?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fb16b8810-8b88-4aff-b63b-93e652a04643%2F73a77e9b-754b-4903-bab0-1cb7baefe66e%2Fme3hrs_processed.png&w=3840&q=75)
Transcribed Image Text:Q4) A semiconductor photodetector is sensitive to visible red light (has about 650 nm
wavelength).
a) What is the max. value of its bandgap energy?
b) If 0,2 cm2 area of this semiconductor is illuminated with red light whose intensity is 3
mW/cm2, what is the # of electron-hole pairs generated per second? (Assume that each photon
generates one EHP.)
c) Calculate the initial wavelength of photons which are emitted from Si crystal as a result of
e-h recombination. Is it in the visible range?
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