研究目的
Investigating the synthesis and characterization of vinazene end capped dipyrrolo[2,3-b:2',3'-e]pyrazine-2,6(1H,5H)-dione small molecules as non-fullerene acceptors for bulk heterojunction organic solar cells.
研究成果
The study successfully synthesized and characterized two new low band gap molecules DPDV and DPEV, demonstrating their potential as acceptors in BHJOSCs. Despite moderate photovoltaic performance, the work highlights the need for optimization of film morphology and suggests further applications in perovskite solar cells.
研究不足
The low performance of the devices based on these novel NFAs may be related to a poor mixture between the polymer and the non-fullerene molecules, resulting in films with poor morphology and charge accumulation regions.
1：Experimental Design and Method Selection:
The synthesis involved Heck coupling reaction to create DPDV and DPEV molecules. Photophysical and electrochemical properties were investigated for application in BHJOSCs.
2：Sample Selection and Data Sources:
Materials were synthesized and characterized using NMR, mass spectrometry, UV-Vis absorption, and fluorescence spectroscopy.
3：List of Experimental Equipment and Materials:
Instruments included Bruker NMR spectrometers, Jasco V-550 spectrophotometer, Spex Fluorolog-3 spectrofluorometer, and Autolab PGSTAT10 potentiostat.
4：Experimental Procedures and Operational Workflow:
Synthesis steps included alkylation, Friedel-Crafts acylation, and Heck coupling. Photovoltaic devices were fabricated and tested under AM
5：5G illumination. Data Analysis Methods:
Optical and electrochemical properties were matched with theoretical values. Device performance was evaluated based on JSC, VOC, FF, and PCE.
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