A silicon photodiode under illumination delivers a photocurrent density and has a…

PHYSICS · Subjective · Fermi University Physics · Condensed Matter, Materials & Soft Matter · Semiconductor physics and devices · Semiconductor physics and devices

Condensed Matter Physics, Ch The junction: diodes, transistors, lamps and solar cells

Problem

A silicon photodiode under illumination delivers a photocurrent density Jph=15 mA cm−2J_{\rm ph}=15\,\mathrm{mA\,cm^{-2}} and has a saturation current density J0=8.0×10−13 A cm−2J_0=8.0\times10^{-13}\,\mathrm{A\,cm^{-2}} at 300 K300\,\mathrm{K}. Find its open-circuit voltage, and compare it with silicon's gap voltage Eg/e=1.12 VE_g/e=1.12\ \mathrm{V}.

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