研究目的
Investigating the effect of an additive solvent, 1,8-diiodooctane (DIO), on the performance of bilayer organic photovoltaic devices using PSiF-DBT as the electron donor material and C60 as the electron acceptor material.
研究成果
The use of DIO as a solvent additive significantly improves the performance of bilayer OPV devices by increasing the interfacial area between donor and acceptor materials and enhancing conductivity. This treatment offers a viable alternative to thermal annealing, with potential advantages for manufacturing scalability.
研究不足
The study is limited to the specific materials (PSiF-DBT and C60) and the solvent additive (DIO) used. The scalability of the solvent additive treatment for large-scale manufacturing was not extensively explored.
1：Experimental Design and Method Selection:
The study involved the preparation of bilayer OPV devices with and without the DIO additive, and with thermal annealing. The performance was evaluated through photovoltaic J-V characteristic curves, charge mobility measurements, and morphological analysis.
2：Sample Selection and Data Sources:
Devices were fabricated with PSiF-DBT as the donor layer and C60 as the acceptor layer. The donor layer was treated with DIO or thermal annealing, and compared to untreated samples.
3：List of Experimental Equipment and Materials:
Atomic Force Microscopy (AFM) for morphological analysis, Photo-CELIV for charge mobility measurements, and advanced microscopy techniques for cross-sectional evaluations.
4：Experimental Procedures and Operational Workflow:
The donor layer was spin-coated from a solution with or without DIO, followed by C60 deposition. Devices were characterized under illumination to measure J-V characteristics.
5：Data Analysis Methods:
The performance parameters (PCE, JSC, VOC, FF) were extracted from J-V curves. Morphological changes were analyzed through AFM and tSEM images.
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