4. Briefly explain the motion of carriers in semiconductor materials (i) when there is no electric field, (ii) when there is electric field, and (iii) when there is illumination. 5. Briefly explain how the absorption coefficient and absorption depth change as a function of wavelength in semiconductor materials. Briefly explain why the absorption coefficient increaseswith increasing photon energy for energies near the bandgap.
4. Briefly explain the motion of carriers in semiconductor materials (i) when there is no electric field, (ii) when there is electric field, and (iii) when there is illumination. 5. Briefly explain how the absorption coefficient and absorption depth change as a function of wavelength in semiconductor materials. Briefly explain why the absorption coefficient increaseswith increasing photon energy for energies near the bandgap.
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4. Briefly explain the motion of carriers in semiconductor materials (i) when there is no electric
field, (ii) when there is electric field, and (iii) when there is illumination.
5. Briefly explain how the absorption coefficient and absorption depth change as a function of
wavelength in semiconductor materials. Briefly explain why the absorption coefficient increaseswith increasing photon energy for energies near the bandgap.
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