High efficiency and high photo-stability zinc-phthalocyanine based planar heterojunction solar cells with a double interfacial layer

摘要

The use of Cul and MoO_3 as a double interfacial layer between indium tin oxide (ITO) and a zinc phthalocyanine (ZnPc) layer improves the power conversion efficiency (η_p) and the photo-stability at the same time in ZnPc based solar cells. Insertion of CuI without MoO_3 increased η_p more than 2 times to 3.3%. However, the photo-stability is lowered even further due to diffusion of Cu. Insertion of the MoO_3 layer between the ITO and CuI prevents the diffusion of Cu under UV illumination to achieve the improved photo-stability and η_p.