Cellulose transparent conductive film and its feasible use in perovskite solar cells

A transparent conductive Ag nanowire (AgNW)-regenerated cellulose film (RCF) was prepared and has been proposed to be used as an anode for perovskite solar cells. The HNO₃ treatment was used for solving the dilemma between optical transparency and conductivity caused by the AgNW introduction; in addition, the bonding strength between AgNWs and cellulose film was enhanced substantially via HNO₃ treatment. Accordingly, the AgNW-RCF with a AgNW size of 15 μm × 85 nm and density of 0.36 g m^-2 shows impressive conductivity and transparency, with a sheet resistance of 29 Ω □^-1 and a transmittance of 80% at a wavelength of 550 nm. Perovskite solar cells incorporating such AgNW-RCF anodes exhibited a cell performance with a V _oc of 1.02 V, J _sc of 9.58 mA cm^-2, FF of 45.8% and PCE of 4.49%.