研究目的
To synthesize a novel polyethylene glycol-functionalized fullerene derivative (C60-PEGA) and evaluate its performance as an electron transport layer (ETL) in inverted bulk heterojunction polymer solar cells (inverted BHJ-PSCs).
研究成果
The novel polyethylene glycol-modified fullerene derivative (C60-PEGA) was successfully synthesized and applied as an ETL in inverted BHJ-PSCs, achieving a PCE of 9.25%, which is higher than that of the ZnO-based device (8.61%). The improved performance is attributed to the increased electron mobility and effective electron transport facilitated by the reduced work function of ITO via C60-PEGA modification.
研究不足
The study focuses on the synthesis and application of C60-PEGA as an ETL in inverted BHJ-PSCs. The limitations include the specific conditions under which the devices were fabricated and tested, and the comparison was made only with ZnO ETL.
1：Experimental Design and Method Selection:
A novel polyethylene glycol-functionalized fullerene derivative (C60-PEGA) was synthesized via a one-step nucleophilic addition reaction. The molecular structure was confirmed by NMR, FT-IR, and XPS.
2：Sample Selection and Data Sources:
C60-PEGA was applied as an ETL in inverted BHJ-PSCs with the active layer of PTB7-Th: PC71BM.
3：List of Experimental Equipment and Materials:
Materials included C60, zinc acetate dihydrate, PTB7-Th, and PC71BM. Equipment included a Keithley 2400 source measurement unit and a standard xenon-lamp-based solar simulator.
4：Experimental Procedures and Operational Workflow:
The synthesis of C60-PEGA, fabrication of inverted BHJ-PSC devices, and characterization of the devices were performed.
5：Data Analysis Methods:
The performance of the devices was evaluated based on photovoltaic parameters such as PCE, Jsc, Voc, and FF.
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