研究目的
Investigating the effect of different chalcogen atoms (O, S, Se) fused into perylene diimide tetramers on the performance of organic solar cells.
研究成果
The embedding of O atom into PDIs is a feasible way to boost photovoltaic performance, with SF-4PDI-O achieving a PCE of 8.904% and a high FF of 0.706, outperforming its S and Se counterparts due to stronger crystallinity, balanced mobilities, and efficient charge transfer.
研究不足
The study focuses on the effect of chalcogen atoms on PDI-based acceptors and their photovoltaic performance, but does not explore other potential modifications or combinations that could further enhance efficiency.
1：Experimental Design and Method Selection:
Designed and synthesized three perylene diimide tetramers annulated by different chalcogen atoms (O, S, Se). Paired with polymeric donor PDBT-T1 to construct OSCs.
2：Sample Selection and Data Sources:
Used SF-4PDI-O, SF-4PDI-S, and SF-4PDI-Se as acceptors with PDBT-T1 as donor.
3：List of Experimental Equipment and Materials:
Utilized chloroform solutions for absorption spectra, cyclic voltammetry for electrochemical properties, and atomic force microscopy for morphology.
4：Experimental Procedures and Operational Workflow:
Fabricated OSCs devices, measured photovoltaic performance, and analyzed active-layer morphology.
5：Data Analysis Methods:
Analyzed data using UV?vis absorption spectroscopy, cyclic voltammetry, and GIWAXS.
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