研究目的
To achieve efficient quaternary organic solar cells through individual nanostructure optimization in donor and acceptor phases.
研究成果
The quaternary strategy of using PC71BM and DR3TBDTT to individually modify the bulk heterojunction morphology of PTB7-Th:FOIC based devices provides a feasible way to realize high-efficient OSCs, achieving a power conversion efficiency of 13.51%. This approach highlights the importance of simultaneous optimization of donor and acceptor phases for enhanced device performance.
研究不足
The study focuses on specific material combinations (PTB7-Th:FOIC with PC71BM and DR3TBDTT) and may not be directly applicable to other material systems. The optimization of PC71BM and DR3TBDTT ratios is crucial, and deviations may lead to inferior performance.
1：Experimental Design and Method Selection:
The study involves the design of quaternary organic solar cells using PTB7-Th:FOIC based blends with PC71BM and DR3TBDTT as additives to optimize the nanostructure of donor and acceptor phases individually.
2：Sample Selection and Data Sources:
The materials used include PTB7-Th, FOIC, PC71BM, and DR3TBDTT, selected for their matching crystallinities, cascade energy levels, and complementary absorption spectra.
3：List of Experimental Equipment and Materials:
Equipment includes GIWAXS for molecular packing analysis, R-SoXS for phase separation analysis, TEM for morphology characterization, and DSC for thermal analysis.
4：Experimental Procedures and Operational Workflow:
The process involves blending the materials in specific ratios, fabricating solar cells with an inverted device structure, and characterizing their performance and morphology.
5：Data Analysis Methods:
The analysis includes evaluating device performance parameters, carrier mobility via SCLC model, and charge dynamics through transient absorption spectroscopy.
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