Fig. 2
From: High Weight-Specific Power Density of Thin-Film Amorphous Silicon Solar Cells on Graphene Papers
Fabrication procedures of the solar cell based on graphene paper. (a) Addition of reduced graphene oxide sheet in the aqueous solution of cetyltrimethylammonium bromide. (b) Dispersion of the mixture solution. (c) Centrifugation of the graphene solution. (d) Collection of the supernatant with well dispersed graphene flakes. (e) Addition of carbon nanotubes to the supernatant. (f) Vaccum filtration of the solutions over the through-hole anodic aluminum oxide membrane to obtain graphene paper on the anodic aluminum oxide filter. (g) Separation of graphene paper from the anodic aluminum oxide filter after drying. (h) a-Si:H solar cells fabricated on the graphene paper substrate demonstrate excellent flexibility by wrapping around the glass rod