研究目的
Investigating the effects of different central bridging atoms (C, Si, and Ge) in tricyclic-fused donor units of polymer acceptors on the performance and mechanical robustness of all-polymer solar cells.
研究成果
The study demonstrated that central bridging atoms significantly affect the crystallinity, charge mobility, and mechanical robustness of polymer acceptors. The PF2-DTSi-based all-PSCs achieved a high PCE of 10.77% and excellent mechanical robustness, making them suitable for practical applications in flexible devices.
研究不足
The study is limited to the investigation of polymer acceptors with C, Si, and Ge as central bridging atoms. The mechanical robustness was only tested up to 1,200 bending cycles at a bending radius of ~4 mm.
1：Experimental Design and Method Selection:
The study involved the synthesis of three polymer acceptors with different central bridging atoms and their characterization. The photovoltaic performance was evaluated using all-PSCs with a device structure of ITO/PEDOT:PSS/PM6:PF2-DTX/PFN-Br/Al.
2：Sample Selection and Data Sources:
The polymer acceptors were synthesized by Stille-coupling polymerization. The active layers were prepared from a spin-coated binary blend solution of chloroform:chloronaphthalene.
3：List of Experimental Equipment and Materials:
The study utilized GIWAXS for crystallinity analysis, AFM and TEM for morphology investigation, and a pseudo free-standing tensile test system for mechanical robustness evaluation.
4：Experimental Procedures and Operational Workflow:
The photovoltaic devices were fabricated and optimized under the same conditions. The mechanical properties of the active layers were measured using a tensile test system.
5：Data Analysis Methods:
The data were analyzed using statistical techniques and software tools for GIWAXS, AFM, TEM, and tensile test measurements.
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