研究目的
To fabricate efficient and platinum-free dye-sensitized solar cells (DSSCs) using polyaniline/graphene nanocomposites as counter electrode materials.
研究成果
PANi/GR composites are electrochemically stable and possess high catalytic activity towards the reduction reaction at counter electrodes. The optimal graphene content in the composite was found to be 9%, achieving a PCE of 7.45%, slightly lower than Pt-based DSSCs (7.63%). These findings suggest that PANi/GR nanocomposites are viable alternatives to Pt in DSSCs.
研究不足
The study notes that graphene sheets tend to agglomerate at high concentrations, which can obliterate the morphology of nanocomposites and limit the PCE of DSSCs. Additionally, the PCE of PANi/GR-based DSSCs is slightly lower than that of Pt-based DSSCs.
1：Experimental Design and Method Selection:
The study involved the synthesis of PANi/graphene nanocomposites via in-situ polymerization of aniline in graphene acidic dispersion. The morphology was analyzed using SEM, and electrochemical performance was evaluated through Tafel tests.
2：Sample Selection and Data Sources:
Graphene with an average sheet thickness of 8 nm and surface area of 100 m2/g was used. The nanocomposites were prepared with varying graphene contents (3% to 15%).
3：List of Experimental Equipment and Materials:
SEM for morphology analysis, Tafel test setup for electrochemical performance, and standard DSSC fabrication materials including TiO2, FTO substrates, and isopropanol.
4：Experimental Procedures and Operational Workflow:
The nanocomposites were synthesized, characterized, and then used to fabricate DSSCs. The photovoltaic performance of these DSSCs was evaluated under standard conditions.
5：Data Analysis Methods:
The electrochemical performance was analyzed using Tafel curves, and photovoltaic parameters were derived from J-V characteristics.
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