[2PS-081]
Thermal Crosslinking Strategy of the Hole Transport Layer for Enhanced Water Stability in Organic Solar Cells.
발표자김명진 (경북대학교)
연구책임자차효정 (경북대학교)
Abstract
Poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) serves as one of the most common choice for the hole transport layer (HTL) in organic solar cells (OSCs), offering distinct advantages including water processability, optical transparency, and easy commercial availability. However, the hygroscopic nature of the PSS component in PEDOT:PSS can lead to moisture absorption, resulting in the formation of pinholes and charge recombination sites at the interface, which significantly deteriorate device performance and stability. OSC devices with the modified HTL by simple thermal crosslinking method maintained comparable photovoltaic performance to conventional PEDOT:PSS-based ones, while exhibiting significantly enhanced water resistance, operational stability, and mechanical robustness. This approach offers a simple and effective way toward high-efficiency, long-lifetime OSCs.