Figure 2
(a) Schematic of a nanowire solar cell consisting of InP substrate (p-type at the bottom and n-type on top), an insulating SiO2 layer and an ITO cover. (b) shows an SEM image of the nanowires deposited on the Si3N4 membrane after the X-ray experiment. (c) is an SEM image of the standing nanowire in (b) which is highlighted by a grey rectangle. The view is at an angle of 45°. (d) shows two lying nanowires of the sample [cf. circle in (b)]. Here, the diameter was measured to be about 300 nm at the body and 360 nm at the head. The length is about 2.6 µm. |