A series of low-cost donor–π–donor structured hole-transport materials have been developed. Among them, DTP-FOS exhibits superior performance to spiro-OMeTAD, achieving higher power conversion efficiency and enhanced operational stability.
This review explores different paths to replace traditional HTMs, it discusses recent advancements in conjugated organic-HTMs, organic-SAMs and polymeric-HTMs, aiming to improve the efficiency and stability of lead and tin-based PSCs.
The methoxy-substituted terthienyl (DTP) core structure was formed by introducing a methoxy-group into a terthienyl unit, which can optimize the HOMO energy level alignment, increase hole mobility and improve film forming properties.
A tailored design of asymmetric hole-transporting materials (HTMs) is reported with the synthesis of a family of new HTMs based on the use of the 5H-dithieno[3,2-b:2′,3′-d]pyran (DTP) moiety endowed with donor p-methoxytriphenylamines.
Efficient conventional perovskite solar cells with organic dopant-free HTMs are collected. It is showed that both the chemical structure of HTMs and interfacial materials play significant roles in efficiency, and their effects are discussed.