Spiro-Type Small Molecule Hole Transport Materials in Perovskite Solar Cells
The performance of hole transport materials significantly influences the hole transport and electron-hole recombination in perovskite solar cells,which in turn affects the cells'efficiency.The spiro-type structure has a unique orthogonal molecular conformation.This makes the molecules form good contact on the perovskite film easily.It also leads to uniform charge transport characteristics and a higher glass transition temperature.This material has been widely used as a highly efficient hole transport material skeleton unit in perovskite solar cells.This paper summarizes the advancements in spiro-type hole transport materials,focusing primarily on the optimization of terminal functional groups and spiro-type core regulation in spiro-type small molecule materials.It discusses how changes in molecular structure impact the material's photophysics,electrochemistry,thermal stability,hole transport characteristics,and overall performance in perovskite solar cells.Additionally,this paper forecasts future developments in this area,examining the trends and research directions of high-performance spiral-type hole transport materials.
perovskite solar cellhole transport materialspiro-typephotovoltaic conversion efficiency
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