Comparison of metal oxides as anode buffer layer for small molecule organic photovoltaic cells

▶ MoO3 and WO3 thin films used as anode buffer layer in photovoltaic devices. ▶ The function of MoO3 and WO3 was discussed and the thickness of them was optimized. ▶ The morphology of optimum thickness of anode buffer layers was compared. ▶ The optoelectrical properties of organic photovoltaic devices were investigated. ▶ Higher power conversion efficiency was obtained by the MoO3 film as buffer layer.