Research Article

Ambient Air and Hole Transport Layer Free Synthesis: Towards Low Cost CH3NH3PbI3 Solar Cells

Figure 5

(a) curves for TiO2 and TiO2-GO based solar cells. (b) Schematic of complete device along with energy levels overlaid on completed device. (c) SEM image of cross section profile of complete device.
(a)
(b)
(c)