List all the possible peaks that might be observed with electron scattering up to an accelerating voltage of 18 V .

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Photoconductivity and speed Consider two p-type Si samples both doped with 1015 B atoms cm−3. Both have identical dimensions of length L (1 mm), width W (1 mm), and depth (thickness) D (0.1 mm). One sample, labeled A, has an electron lifetime of 1 μs whereas the other, labeled B, has an electron lifetime of 5 μs. a. At time t = 0, a laser light of wavelength 750 nm is switched on to illuminate the surface (L × W) of both the samples. The incident laser light intensity on both samples is 10 mW cm−2. At time t = 50 μs, the laser is switched off. Sketch the time evolution of the minority carrier concentration for both samples on the same axes. b. What is the photocurrent (current due to illumination alone) if each sample is connected to a 1 V battery?

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Chapter 4, Problem 48P

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List all the possible peaks that might be observed with electron scattering up to an accelerating voltage of 18 V .

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Photoconductivity and speed Consider two p-type Si samples both doped with 1015 B atoms cm−3. Both have identical dimensions of length L (1 mm), width W (1 mm), and depth (thickness) D (0.1 mm). One sample, labeled A, has an electron lifetime of 1 μs whereas the other, labeled B, has an electron lifetime of 5 μs. a. At time t = 0, a laser light of wavelength 750 nm is switched on to illuminate the surface (L × W) of both the samples. The incident laser light intensity on both samples is 10 mW cm−2. At time t = 50 μs, the laser is switched off. Sketch the time evolution of the minority carrier concentration for both samples on the same axes. b. What is the photocurrent (current due to illumination alone) if each sample is connected to a 1 V battery?

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