6. Use this information to answer Question 6-7: Photoconductive detector detects light by measuring the changes in resistance caused by light illumination. Consider an n-type Si rectangular bar with a length L = 1 cm, width W = 0.5 mm and thickness t = 5.0 um. Doping density is Np = 1014 cm. Calculate the resistance when it is placed in the dark. Give your answer in unit of N. Answers within 5% error will be considered correct. 1851851 Correct 7. The top surface (1 cm x 0.5 mm) is now uniformly illuminated by monochromatic light at 1.3 ev with power density of 0.3 W/cm?. Calculate the resistance under this condition. Absorption coefficient of silicon at the wavelength of illumination is 1 x 10° cm-1 and the carrie lifetime is = T, = 10-6 s. A simple approximation is to calculate the carrier generation rate by multiplying incident photon flux with absorption coefficient. Give your answer in unit of 2. Answers within 5% error will be considered correct. 88118.41787 Correct

6. Use this information to answer Question 6-7: Photoconductive detector detects light by measuring the changes in resistance caused by light illumination. Consider an n-type Si rectangular bar with a length L = 1 cm, width W = 0.5 mm and thickness t = 5.0 um. Doping density is Np = 1014 cm. Calculate the resistance when it is placed in the dark. Give your answer in unit of N. Answers within 5% error will be considered correct. 1851851 Correct 7. The top surface (1 cm x 0.5 mm) is now uniformly illuminated by monochromatic light at 1.3 ev with power density of 0.3 W/cm?. Calculate the resistance under this condition. Absorption coefficient of silicon at the wavelength of illumination is 1 x 10° cm-1 and the carrie lifetime is = T, = 10-6 s. A simple approximation is to calculate the carrier generation rate by multiplying incident photon flux with absorption coefficient. Give your answer in unit of 2. Answers within 5% error will be considered correct. 88118.41787 Correct

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter1: Atomic Structure

Section: Chapter Questions

Problem 6RQ: How many valence electrons are generally contained in materials used for insulators?

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