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• W4313559245 endingPage "122322" @default.
• W4313559245 startingPage "122322" @default.
• W4313559245 abstract "Y-series-based non-fullerene acceptors (NFAs) have achieved significant deliberation by chemists and physicists because the promising optical and photochemical properties associated with high-performance OSCs can be further tuned through end-capped modification. In this work, such modifications of Y-series benzothiadiazole-based NFAs were accomplished theoretically to propose new acceptors for photovoltaic cells (PVCs). The recently synthesized Y-series non-fullerene acceptor m-BTP-PhC6 was taken as a reference acceptor. We designed five new acceptors (BTP1-BTP5) through the structural modification at both ends of acceptor groups and evaluated their performance by applying DFT and TD-DFT. The newly engineered molecules exhibited a narrower bandgap (Eg) than the reference (R) resulting in better intramolecular charge transfer (ICT). Further, the designed acceptors expressed the maximum absorption in the region of 600–800 nm revealing a redshift in their absorption spectrum. Low excitation energy and low exciton binding energy were noted for designed acceptors confirming them as better candidates for high PCE of solar cells. Low reorganizational energy for the mobility of holes and electrons was also observed for the designed molecules, indicating improved charge transfer properties. The newly tailored acceptor BTP4 was found to be the promising candidate among all acceptors because of lower bandgap, lower exciton binding energy, reorganizational energy, and redshift of the absorption spectrum. The complex analysis of BTP4 with donor polymer PTB7-Th and PM6 was executed at the same DFT level. Furthermore, FMOs studies showed relatively rich electron density in the acceptor groups of LUMO as compared to the reference molecule. The overall theoretical results of this study showed that the designed acceptors played a productive and effective role in uplifting the efficiency of fullerene-free energy devices." @default.
• W4313559245 created "2023-01-06" @default.
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• W4313559245 date "2023-04-01" @default.
• W4313559245 modified "2023-10-12" @default.
• W4313559245 title "Tailoring the solar cell efficiency of Y-series based non-fullerene acceptors through end cap modification" @default.
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• W4313559245 doi "https://doi.org/10.1016/j.saa.2023.122322" @default.
• W4313559245 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/36652802" @default.
• W4313559245 hasPublicationYear "2023" @default.
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