Improved performance of P3HT:PCBM photovoltaic devices with ITO treated by hydrogen peroxide

The properties of poly(3-hexylthiophene):(6,6)-phenyl C61 butyric acid methyl ester (P3HT:PCBM) organic photovoltaic devices (OPVs) with indium tin oxide (ITO) anode treated by hydrogen peroxide are investigated. The optimized hydrogen peroxide solution has a concentration of 10% and ITO is treated for 15 min. The modification of ITO anode results in an enhancement of the power conversion efficiency (PCE) of the device, which is attributed to the increase of the photocurrent. The performance enhancement is attributed to the work function modification of the ITO substrate through the strong oxygenation of hydrogen peroxide, and then the charge collection efficiency is improved.