ECE 3080 - Dr. Alan DoolittleGeorgia TechPhotogenerationLight with photon energy, hν< Egis not easily absorbed. A convenient expression for the energy of light is E=1.24/λwhere λis the wavelength of the light in um.Light with energy, hν> Eg is absorbed with the “unabsorbed”light intensity as a function of depth into the semiconductor is I(x) = Ioe-αxwhere Io is the initial light intensity, x is distance and αis the absorption coefficient [1/cm].hν< Eghν> Eg
ECE 3080 - Dr. Alan DoolittleGeorgia TechPhotogeneration
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