研究目的
Investigating the design and synthesis of a new “Y-series” non-fullerene acceptor with an asymmetric electron-deficient-core for enhancing the performance of organic solar cells.
研究成果
The study successfully demonstrated the design and synthesis of a new asymmetric Y-series non-fullerene acceptor, Y21, which achieved a high PCE of 15.4% in organic solar cells. This work provides a new molecular design strategy to modify the DA’D core, offering a pathway to further enhance the performance of organic solar cells.
研究不足
The study focuses on the modification of the DA’D core in Y-series NFAs, which, while innovative, may have limitations in terms of scalability and cost-effectiveness due to the complexity of the synthesis process. Additionally, the performance of the devices may be further optimized by exploring other donor materials or device architectures.
1：Experimental Design and Method Selection:
The study involved the design and synthesis of a new non-fullerene acceptor, Y21, with an asymmetric electron-deficient-core. The methodology included Stille coupling reaction, double intramolecular Cadogan reductive cyclization, Vilsmeier-Haack reaction, and Knoevenagel condensation reaction.
2：Sample Selection and Data Sources:
The materials used included PM6 as the donor material and Y21 as the acceptor material.
3：List of Experimental Equipment and Materials:
The synthesis involved various chemical reagents and solvents, with characterization by 1H NMR, 13C NMR, and high-resolution mass spectrum.
4：Experimental Procedures and Operational Workflow:
The photovoltaic devices were fabricated with an inverted device structure of ITO/ZnO/active layer/MnO3/Ag. The active layer was optimized by varying D/A ratio, processing additive concentration, and annealing temperatures.
5：Data Analysis Methods:
The performance of the devices was evaluated through current density versus voltage characteristics, EQE curves, and charge transport properties measured by the space-charge-limited current method.
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