研究目的
Investigating the effects of trifluoromethylation of end-capping groups on non-fullerene small molecule electron acceptors (NFAs) for solar cells to improve power conversion efficiency.
研究成果
The trifluoromethylation of end-capping groups in non-fullerene acceptors significantly improves the power conversion efficiency of polymer solar cells. The ITCF3 acceptor demonstrated superior optoelectronic properties and device performance compared to ITIC, highlighting the potential of trifluoromethylation in the design of efficient photovoltaic materials.
研究不足
The study is limited to the comparison of ITCF3 and ITIC acceptors with PM6 polymer donor. The effects of trifluoromethylation on other types of acceptors or with different donors were not explored.
1：Experimental Design and Method Selection:
The study involved the synthesis of a trifluoromethylated acceptor ITCF3 and its comparison with a non-fluorinated analogue ITIC. The optoelectronic properties of both acceptors were characterized, and their performance in polymer solar cells (PSCs) was evaluated.
2：Sample Selection and Data Sources:
Commercial chemicals were used for synthesis, and the photovoltaic properties were tested using fabricated PSCs.
3：List of Experimental Equipment and Materials:
Indium tin oxide (ITO) glass, zinc oxide (ZnO), PM6 polymer donor, molybdenum oxide (MoO3), silver (Ag), and chloroform solution for spin coating.
4：Experimental Procedures and Operational Workflow:
The PSCs were fabricated with an inverted device structure, and the active layers were spin-coated and annealed. The photovoltaic performance was tested under AM
5：5G illumination. Data Analysis Methods:
The performance of PSCs was analyzed using current density-voltage (J-V) curves and external quantum efficiency (EQE) measurements. Charge transport properties were investigated using the space charge-limited current (SCLC) method.
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