364638.fig.004a
(a)
364638.fig.004b
(b)
364638.fig.004c
(c)
364638.fig.004d
(d)
Figure 4: The performance of a-Si1−xGex:H single-junction cells as a function of the p/i grading width under illumination of AM1.5G light source. The p/i grading width was changed from 0 to 70 nm meanwhile keeping the total thickness of the absorber at 230 nm for all the cells. The lines were drawn to guide the eye.