| dc.description.abstract | In recent years, solar cells based on organic materials, such as Organic Photovoltaics (OPVs), Dye-Sensitized Solar Cells (DSSCs), and Perovskite Solar Cells (PSCs), have garnered widespread attention and focus. Among these, Perovskite Solar Cells (PSCs) are the most anticipated and have shown tremendous potential for development. Since perovskites were first used as solar cell materials in 2009, their efficiency has increased significantly from an initial 3.9% to the current 26.1%.
This study designed and synthesized two series of hole transport materials (HTMs) and applied them in inverted perovskite solar cells. The first series, named the TCPS series, uses triphenylamine as the donor, carbazole as the π-bridge, and pyridine as the acceptor, with an anchoring group attached at the end. This forms a pyridinium derivative with a ＂Donor → π-conjugated system → Acceptor = Anchoring group＂ structure. The terminal anchoring group, in the form of an enol, extends the overall conjugation length, resulting in improved hole mobility.The second series, referred to as the DE series, uses acetylacetone as the acceptor, with a carbon adjacent to it to design a molecular structure featuring two enol forms. Triphenylamine, serving as the donor, is attached at one end, while different electron-donating groups are introduced at the other end to further extend the conjugation and enhance hole mobility. These two series can also interact with uncoordinated lead ions in the perovskite absorber layer through the enol form to passivate defects. Additionally, they can adsorb onto the ITO substrate through chelation, thereby improving interfacial properties and charge transport efficiency. The impact on device performance is further explored. | en_US |