Solution-processed MoSx thin-films as hole-transport layers for efficient polymer solar cells

Abstract

Here we employed a simple solution-processed method to prepare MoS_x films as hole-transport layers (HTLs) in polymer solar cells (PSCs). Impressive performance was achieved with a power conversion efficiency (PCE) of 7.50%, which is comparable to those of the conventional devices with PEDOT:PSS HTLs. The surface and optoelectronic characteristics of MoS_x films obtained from different conditions were investigated. The results reveal that the annealing temperature of MoS_x is one of the most important factors on determining the device performance. PSCs based on MoS_x films exhibited much better device stability compared to the counterpart based on PEDOT:PSS, suggesting that the MoS_x film is a promising alternative HTL for PSCs.