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 Voc of 1.02 V, Jsc of 9.58 mA cm−2, FF of 45.8% and PCE of 4.49%.