Post-Treatment Free Yttrium Phosphotungstate Anode Interfacial Material for Organic Solar Cells with 20.55% Efficiency

ACS Energy Letters, Journal Year: 2025, Volume and Issue: unknown, P. 2045 - 2051

Published: April 1, 2025

Language: Английский

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Fluorobenzene Side Chain‐Engineered Y6 Derivatives for Enhanced Molecular Stacking and High‐Performance Additive‐Free Organic Solar Cells

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 6, 2025

Abstract Organic solar cells (OSCs) have become a promising photovoltaic technology, achieving high efficiencies over 20%. However, simplifying processing techniques to maintain performance remains significant challenge. This work reports series of Y6‐derived non‐fullerene acceptors (NFAs), namely BTP‐R1F, BTP‐R2F, BTP‐R3F, and BTP‐R5F, featuring fluorinated phenoxyoctyl side chains with varying numbers fluorine atoms. Systematic fluorination has minimal impact on optical absorption energy levels but significantly influences molecular packing morphology. BTP‐R5F exhibit compact honeycomb‐like stacking patterns enhanced π–π interactions, while BTP‐R3F displays looser S‐shaped due severe chain folding, thus hindering charge transport. Additive‐free OSCs processed toluene demonstrate that D18/BTP‐R5F formed well‐defined fiber‐like interpenetrating network, remarkable power conversion efficiency (PCE) 19.06%. study highlights the potential fluorobenzene engineering enhance morphology without any additive, offering pathway toward scalable high‐performance simplified conditions. The findings provide valuable insights for designing next‐generation NFAs efficient reproducible OSCs.

Language: Английский

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3,4-Difluoropyridine based polymer additives for optimizing aggregation and phase separation enable 20.07% efficiency layer-by-layer organic solar cells

Polymer, Journal Year: 2025, Volume and Issue: unknown, P. 128380 - 128380

Published: April 1, 2025

Language: Английский

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Cyanobenzene‐Modified Quinoxaline‐Based Acceptors with Optimal Excitonic Behavior Enable Efficient Organic Solar Cells

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: May 22, 2025

Abstract Cyanogroup (‐CN) is a strongly electron‐withdrawing and highly polar functional group; therefore, cyanation has been extensively utilized to optimize the terminal groups of high‐performance small‐molecule acceptors (SMAs) in organic solar cells (OSCs). Herein, by regulating cyanobenzene substitution central core for first time, four novel SMAs are synthesized, named phCN‐F, phCN‐Cl, 2phCN‐F, 2phCN‐Cl. Theoretical experimental analyses have shown that asymmetric symmetric cyanobenzene‐substitution core, coupled with selective groups, can significantly affect intrinsic excitonic properties molecule. Blends based on molecules possess tighter molecular packing more suitable phase separation facilitate exciton dissociation, charge transport, extraction. The optimal device performance phCN‐F‐based OSC reaches 20.16%, which higher than symmetrically substituted OSCs. Furthermore, devices prepared phCN‐F maintain over 90% their initial efficiency after being heated at 85°C 3000 h, demonstrating excellent thermal stability. This study elucidates potential mechanisms optimizing through providing valuable insights further design record‐breaking SMAs.

Language: Английский

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Recent Advances in Ambient-air-processed Organic Photovoltaics : Devices Design and Printing Technology

Published: May 1, 2025

Language: Английский

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Plasmonic metasurfaces: Light-matter interactions, fabrication, applications and future outlooks

Progress in Materials Science, Journal Year: 2025, Volume and Issue: unknown, P. 101508 - 101508

Published: May 1, 2025

Language: Английский

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