Engineering crystalline structures of two-dimensional MoS2 sheets for high-performance organic solar cells

The effects of different local crystalline structures on two-dimensional (2D) MoS2 sheets are studied to provide new insights into how the local characteristics affect the performance of organic solar cells (OSCs) and how to tailor the local characteristics towards high-performance devices. UV-ozone post-treatment of 2D MoS2 sheets led to incorporation of oxygen atoms into the lattice of the sheets. The incorporated oxygen in 2D MoS2 sheets significantly improved the performance of OSCs, where 2D MoS2 sheets were used as hole transport layers.