研究目的
Investigating the correlation between the alkyl chain length of amine molecules and the defect passivation efficacy in perovskite solar cells.
研究成果
The study demonstrated that modulation of the alkyl chain lengths in amine additives enhances the defect passivation efficacy at grain boundaries and/or on the surface of perovskite films, leading to improved photovoltaic performance. The blade-coated PSCs achieved a power conversion efficiency of 21.5% with a very small voltage loss.
研究不足
The study focuses on the correlation between alkyl chain length and defect passivation efficacy but does not explore the impact of other molecular structures or the long-term stability of the passivated perovskite solar cells.
1：Experimental Design and Method Selection:
The study involved tailoring the perovskite ink formulation with a trace amount of unilateral alkylamine additive (UAA) molecules featuring different alkyl-chain lengths.
2：Sample Selection and Data Sources:
Triple-cation Cs
3：05FA70MA25PbI3 perovskite films were prepared by blade-coating a UAA-modified perovskite ink over a pre-heated ITO glass substrate. List of Experimental Equipment and Materials:
The study used ITO glass substrate, PTAA, C60, BCP, and Cu for the inverted p-i-n PSCs structure.
4：Experimental Procedures and Operational Workflow:
The perovskite films were modified with UAA molecules and characterized using surface SEM images, XRD patterns, and photovoltaic performance measurements.
5：Data Analysis Methods:
The study analyzed the trap density of states (tDOS) and carrier recombination lifetimes using thermal admittance spectroscopy (TAS) and transient photovoltage (TPV) measurements.
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