Recent progress on reactively sputtered metal oxide PV interlayers is presented. A strong correlation between initial material composition and annealing condition to the microstructure of the films is given, leading to pronounced device improvements. A new crystalline MoOx system employed for efficient hole extraction is shown to lead to prolonged OPV lifetimes1, and a new crystalline TiOx layer is shown to lead to efficient electron extraction. In order to meet the requirements on scalable OPV development, the up-scaling of the metal oxides from Roll-to-Roll (R2R) vacuum processing is discussed.
1 Ahmadpour et al, ACS Appl. Energy Mater. 2, 420 (2019)