Effect of Multijunction Approach on Electrical Measurements of Silicon and Germanium Alloy Based Thin-Film Solar Cell Using AMPS-1D

Table 3

Comparison of solar cell parameters for different i-layers.

i-layer	Properties
	Open circuit voltage, 𝑉oc (V)	Short circuit current, 𝐽sc (mA/cm^2)	Field factor, FF (%)	Efficiency, η (%)
Crystalline Si	0.991	20.173	0.831	16.601
Crystalline Ge	0.679	31.586	0.333	7.141
Graded crystalline Si1−𝑋Ge𝑋 alloy (𝑥=0 to 1, with increment 0.25)	0.938	28.202	0.741	19.597