Review on applications of PEDOTs and PEDOT:PSS in perovskite solar cells

Poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) is the most successful conducting polymer in terms of practical application. It has good film forming ability, high transparency in visible light range, high mechanical flexibility, high electrical conductivity, and good stability in air. PEDOT:PSS has wide applications in many areas. This review summarizes its new applications in perovskite solar cells and approaches to modify the PEDOT:PSS layer for better device performance with the corresponding mechanisms. The most cutting edge progresses in perovskite solar cells with PEDOT:PSS are highlighted.