研究目的
Investigating the effect of fullerene substituent on thermal robustness in polymer:fullerene bulk heterojunction solar cells.
研究成果
The substituent of fullerene enhances not only the solubility in solvents but also promotes the migration of the fullerene molecules in polymer:fullerene solid composite. The thermal robustness of the solar cell using unmodified fullerene is better than that using substituted fullerene.
研究不足
The study focuses on the effect of fullerene substituent on thermal robustness but does not explore other factors that may influence the performance of bulk heterojunction solar cells.
1：Experimental Design and Method Selection:
The study examines the effect of fullerene substituent on thermal robustness in bulk heterojunction solar cells using PTB7-Th and C70 or C70-PCBM.
2：Sample Selection and Data Sources:
Solar cells with ITO/PEDOT:PSS/composite/PFN/Al structure are used. The composites are prepared from TMB solution.
3：List of Experimental Equipment and Materials:
Includes PTB7-Th, C70, C70-PCBM, PEDOT:PSS, PFN, and TMB.
4：Experimental Procedures and Operational Workflow:
Composite films are spin-coated on PEDOT:PSS films, followed by thermal annealing at various temperatures. The photovoltaic performance is measured under AM
5：5G 1 sun illumination. Data Analysis Methods:
Current-voltage characteristics are measured, and AFM is used to observe the morphology of the composite films.
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