3. Results and discussion
3.1. Effect of temperature dependence of optical properties
The dielectric function plays a critical role in determining
the optical absorption of thin-film solar cells.
Generally speaking, it is the intrinsic property of the semiconductor
material and varies with temperature. Fig. 2
depicts the change of Si dielectric function with temperature
(Jellison and Modine, 1983). Evidently, the dielectric
function of silicon slightly varies with temperatures.
Nonetheless, the slight variation of the dielectric function
affects the optical absorption of thin-film solar cells.
The optical absorption properties depend not only on
the dielectric function of semiconductor but also on the
cut-off wavelength according to Eq. (3). The cut-off wavelength
is related to the band gap of silicon and can be given
by Singh and Ravindra (2012)