Solar Cell Theory

Discussion in 'Homework Help' started by Lee_831, Sep 2, 2013.

  1. Lee_831

    Thread Starter New Member

    Nov 17, 2009
    Hi Everyone,
    I'm looking for some help on semiconductor physics, in particular solar cell theory.

    In a textbook I have seen that the open-circuit voltage (Voc) of a solar cell is equal to:

    Voc = (Eg/e) - 0.80

    Where Eg = The optical band gap of the device.
    e = Elementary Charge (I assume?)

    A solar cell with a 1.6eV band gap (amorphous silicon, for example) seems to have a Voc of around 0.8v, but I cannot get that answer using that formula.

    Voc = (1.6/√1.4399764) - 0.8 = 0.53v ?

    Any help would be greatly appreciated.

    Many Thanks,