題組內容

4. A p-type GaAs is doped with 62c67f0add553.jpg. Assume for the recombination lifetime of both electrons and holes are62c67f2b8365a.jpg. The sample is under illumination resulting in a constant and spatially uniform generation rate of electron-hole pairs G=62c67f47597ec.jpg. T= 300 K.

(a) Calculate the steady-state electron density.