研究目的
To synthesize new random copolymers comprised of different molar ratios of alkoxyphenylene and alkoxynaphthalene to optimize the HOMO and LUMO levels for high efficiency organic photovoltaics.
研究成果
The introduction of binary solvent additives (ODT + CN) significantly enhances the device efficiencies of organic photovoltaics based on random copolymers by optimizing the bicontinuous donor:acceptor morphology in the active layer, leading to minimized bimolecular recombination and balanced electron/hole mobility ratio.
研究不足
The study focuses on the enhancement of device efficiency through the use of binary solvent additives and does not explore the potential of other morphological control methods or the application of these copolymers in different device architectures.
1：Experimental Design and Method Selection:
The synthesis of random copolymers via Stille coupling reactions and the fabrication of thin film OPVs using a conventional device structure.
2：Sample Selection and Data Sources:
Polymers and PC70BM were mixed to form the bulk heterojunction (BHJ) and spin-coated onto PEDOT:PSS layers.
3：List of Experimental Equipment and Materials:
LCS-100 series small area solar simulator, UV-ozone cleaner, spin coater, thermal evaporator.
4：Experimental Procedures and Operational Workflow:
Cleaning of ITO substrates, spin-coating of PEDOT:PSS, preparation of polymer:PC70BM solution with additives, spin-coating of active layer, methanol treatment, and deposition of Al electrode.
5：Data Analysis Methods:
J–V curves measurement, atomic force microscopy (AFM) for surface morphology analysis, and external quantum efficiency (EQE) measurements.
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