Problem 3: Consider a beam of light of photon energy hv and power P incident on a photoconductor having bandgap energy E

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Problem 3 Consider A Beam Of Light Of Photon Energy Hv And Power P Incident On A Photoconductor Having Bandgap Energy E 1 (65.38 KiB) Viewed 41 times

Problem 3: Consider a beam of light of photon energy hv and power P incident on a photoconductor having bandgap energy Eg such that hv< Eg <2hv. Under these conditions, a small photocurrent density Jp = K ² may be induced in the device, where K is a constant and is the incident photon flux density (photons per unit area per unit time). Explain the physical origin of this photocurrent and why it is proportional to the square of o. Derive an expression for the responsivity in terms of K, hv, P, and A (the area of the detector' illuminated surface).