研究目的
To design and synthesize a new non-halogenated A–D–A architecture non-fullerene small molecular acceptor (NF-SMA) based on indacenodithieno[3,2-b]selenophene as the central unit and thiophene-fused IC as a terminal group for high performance organic solar cells.
研究成果
The synergistic strategy of using an indacenodithieno[3,2-b]selenophene core unit and thiophene-containing IC end group is effective in enhancing the PCE of non-halogenated NF-SMAs, achieving a record PCE of 13.71% for binary organic solar cells with thiophene-containing terminal groups.
研究不足
The study focuses on binary organic solar cells and does not explore tandem or multi-junction devices. The synthesis of selenophene-based materials can be expensive and complex.
1：Experimental Design and Method Selection:
The study involved the synthesis of a new NF-SMA (TSeTIC) and its comparison with a similar NF-SMA (TTTIC). The photovoltaic performance of devices based on these acceptors was evaluated.
2：Sample Selection and Data Sources:
The samples included TSeTIC and TTTIC, with PM6 as the donor material. Data were collected from photovoltaic device measurements, absorption spectra, and mobility tests.
3：List of Experimental Equipment and Materials:
Instruments used included atomic force microscopy (AFM), transmission electron microscopy (TEM), grazing incidence X-ray diffraction (GIXD), and space charge-limited current method for mobility measurements.
4：Experimental Procedures and Operational Workflow:
The synthesis of TSeTIC involved several steps including Suzuki coupling, nucleophilic addition, and Knoevenagel condensation. Device fabrication and characterization followed standard procedures.
5：Data Analysis Methods:
Data were analyzed using DFT calculations, CV curves for energy levels, and GIXD for molecular packing behavior.
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