According to the equation (2), the band gap decreases if temperature increases. Because of this, the short circuit
current of a solar cell generally increases with temperature due to the possibility of absorbing photons with lower
energies to create e-h pairs [7]. On the other hand, there is a reduction in built-in junction potential and hence in
Voc, and in efficiency, as the silicon band gap moves further away from the optimum of 1.35eV for a one sun
AM1.5G spectrum.