Hello all, I have a GaAs LED, and I want to determine the saturation current. I have numerous points from 0.5V-2.9V, with currents of 0.1uA-50mA. I have plotted it on semi-log paper, however, the only linear segment is from 1uA-5000uA, and then it begins to curve downwards. I used the linear segment to determine the saturation current, and the value of "n", however, they hardly describe the diode for anything else beyond this linear segment... Have I done something improper for determining these values?(adsbygoogle = window.adsbygoogle || []).push({});

Note: if I do a scatter plot in excel of all my points, the linear segment is rather from 5mA-50mA

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Determining the saturation current

**Physics Forums | Science Articles, Homework Help, Discussion**