研究目的
Investigating the effectiveness of tri?uoromethylation as a strategy for designing ultra-narrow band-gap nonfullerene acceptors (NFAs) to enhance the power conversion efficiency (PCE) of organic solar cells (OSCs).
研究成果
Tri?uoromethylation is an effective strategy for designing ultra-narrow band-gap NFAs, leading to high-performance OSCs with a record PCE of 15.59%. The single-crystal structure of BTIC-CF3-g provides insights into the molecular packing and charge transport mechanisms, offering a pathway for further improvements in OSC efficiency.
研究不足
The study focuses on the synthesis and characterization of tri?uoromethylated NFAs, with limited discussion on the scalability and cost-effectiveness of the synthesis process for industrial applications.
1：Experimental Design and Method Selection:
The study involved the synthesis of tri?uoromethylated NFAs and their characterization through various spectroscopic and crystallographic techniques.
2：Sample Selection and Data Sources:
The NFAs were synthesized with different substitution end groups (fluorine, chlorine, and tri?uoromethyl) to study their effects on the optical and electronic properties.
3：List of Experimental Equipment and Materials:
Instruments used include UV-vis spectrophotometer, cyclic voltammetry (CV), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), and single-crystal X-ray diffraction.
4：Experimental Procedures and Operational Workflow:
The NFAs were synthesized via Knoevenagel condensation reactions, followed by device fabrication and performance testing.
5：Data Analysis Methods:
The data were analyzed to determine the optical band gaps, energy levels, and photovoltaic performance of the NFAs.
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