Organic photovoltaic cells made from phthalocyanine deckers

Dramatic improvement of organic solar cells conversion efficiency is a significant technical challenge. This includes photon harvesting in the near infrared range of solar spectrum. This work presents a robust organic-inorganic hybrid heterojunction solar cell which possesses the capability to convert near infrared photons. Hybrid bulk heterojunctions were fabricated using rare earth decker phthalocyaninato complexes as electron donors, and new a perylenediimide derivative as electron acceptors. The mixtures of the donators and the acceptors were implanted as the active material into an ITO/TiO2-active material-TiO2/Al cell structure. Conventional solution-based processing was established for the fabrication of these devices. Analysis of the structure, absorption, and photocurrent was done. The photocurrent measurements demonstrated that these devices can harvest photons from UV-VIS to near infrared range. The ITO/TiO2-active material-TiO2/Al structure showed a significant improvement of the conversion efficiency in comparison to conventional bulk heterojunction solar cells.