Hello all! My professor talked about the quasi fermi levels in my Photonics class. While he did make a good effort, I still am not able to understand the concept. I do plan on going to him on Tuesday to get a clearer idea. But I was wondering if any of you folks could give a general definition of what quasi fermi level is. He worked out a problem on calculating the quasi fermi levels, but I didnt quite get it. Could you let me know what equation is typically used to calculate the quasi fermi levels? Thanks a lot!