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Can someone help me to understand this question? An p-type Si sample with Na=21016cm3 is steadily illuminated such that gop=1022 EHP/cm3s. If n=p=15s for this

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An p-type Si sample with Na=21016cm3 is steadily illuminated such that gop=1022 EHP/cm3s. If n=p=15s for this excitation, calculate the separation in the quasi- Fermi levels, (FnFp). Draw the band diagram. Assume T=300K

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