Small PbS/CdS Core-Shell Quantum Dot Hole Transport Material for Improvement of Low Temperature, Solution Processed Planar Perovskite Solar Cells

A photovoltaic device can include a first charge transporting layer including a plurality of semiconductor nanocrystals in contact with a first electrode, a second charge transporting layer in contact with a second electrode and an absorber layer including a perovskite material between the first charge transporting layer and the second charge transporting layer. The plurality of semiconductor nanocrystals can include a core and a shell, wherein the core has a first semiconductor material and the shell has a second semiconductor material.