Hybrid Photoconductive Cathode Interlayer Materials Composed of Perylene Bisimide Photosensitizers and Zinc Oxide for High Performance Polymer Solar Cells

Abstract

Hybrid photoconductive materials based on zinc oxide (ZnO) doped with perylene bisimide (PBI) dye molecules have emerged as new promising cathode interlayer materials for inverted polymer solar cells (i-PSCs). Such interlayers show increased conductivity under light irradiation (working condition of i-PSCs) due to enhanced electron mobility and carrier density, enabling high performance devices at interlayer thickness of up to 100 nm. Such increased interlayer thickness is desired for roll-to-roll processing techniques to facilitate mass production of photovoltaic modules.