2019 Volume 88 Issue 10 Pages 673-677
Inverted organic photovoltaic cells (OPV) reveal high durability and efficient performance by introducing a uniform, air-stable, and low-temperature chemical bath deposited amorphous compact titanium oxide (TiOx) as the electron collection layer. For the last several decades, Kanazawa University had been developing fabrication processes for the inverted OPVs and has investigated mechanisms for the improvement of durability. Herein, in the first half, we introduce the fabrication process of inverted OPVs and demonstrate our developed TiOx layer by chemical bath deposition. In the second half, we also investigate the inner structure in a bulk heterojunction by a solvent treatment and the molecular orientation control method for highly efficient OPVs.