Optimization of μc-Si_1−xGe_x:H Single-Junction Solar Cells with Enhanced Spectral Response and Improved Film Quality

Table 1

Comparison of cell performance for tandem solar cells, having the 0.24 μm thick a-Si:H top cell stacked with different bottom absorbers.

Bottom; absorber	(V)	(mA/cm^2)	FF (%)	Eff. (%)	(mA/cm^2)
					Top	Bot.	Total
0.9 μm μc-:H	1.33	10.18	69.7	9.44	11.28	11.39	22.67
1.4 μm μc-Si:H	1.34	10.39	72.0	10.07	11.27	11.00	22.27