Precisely Controlling Polymer Acceptors with Weak Intramolecular Charge Transfer Effect and Superior Coplanarity for Efficient Indoor All‐Polymer Solar Cells with over 27% Efficiency

Advanced Materials, Год журнала: 2024, Номер 36(32)

Опубликована: Май 28, 2024

Abstract Indoor photovoltaics (IPVs) are garnering increasing attention from both the academic and industrial communities due to pressing demand of ecosystem Internet‐of‐Things. All‐polymer solar cells (all‐PSCs), emerging as a sub‐type organic photovoltaics, with merits great film‐forming properties, remarkable morphological light stability, hold promise simultaneously achieve high efficiency long‐term operation in IPV's application. However, dearth polymer acceptors medium‐bandgap has impeded rapid development indoor all‐PSCs. Herein, highly efficient acceptor (PYFO‐V) is reported through synergistic effects side chain engineering linkage modulation applied for all‐PSCs operation. As result, PM6:PYFO‐V‐based all‐PSC yields highest 27.1% under LED condition, marking value binary date. More importantly, blade‐coated devices using non‐halogenated solvent ( o ‐xylene) maintain an over 23%, demonstrating potential industry‐scale fabrication. This work not only highlights importance fine‐tuning intramolecular charge transfer effect intrachain coplanarity developing high‐performance but also provides strategy

Язык: Английский

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Coplanar Dimeric Acceptors with Bathochromic Absorption and Torsion‐Free Backbones through Precise Fluorination Enabling Efficient Organic Photovoltaics with 18.63% Efficiency

Advanced Science, Год журнала: 2025, Номер unknown

Опубликована: Янв. 20, 2025

Abstract Giant dimeric acceptors (GDAs), a sub‐type of acceptor materials for organic solar cells (OSCs), have garnered much attention due to the synergistic advantages their monomeric and polymeric acceptors, forming well‐defined molecular structure with giant weight high efficiency stability. In this study, first time, two new GDAs, DYF‐V DY2F‐V are designed synthesized OSC operation, by connecting one vinylene linker mono‐/di‐fluorinated end group on Y‐series monomers, respectively. After fluorination, both exhibit bathochromic absorption denser packing modes stronger intramolecular charge transfer effect torsion‐free backbones. Through precise DYF‐V‐based devices highest performance 18.63% among GDA‐based OSCs, outperforming its non‐fluorinated counterpart, DY‐V‐based ones (16.53%). Theoretical morphological results demonstrate that proper fluorination in strengthens intra/intermolecular interactions enhanced crystallinity, superior phase segregation, less energy disorder, which is beneficial fast exciton dissociation, rapid carrier transport, suppressed recombination. The work demonstrates GDAs rigid coplanar backbones effective broader photon harvesting, packing, robust stability OSCs.

Язык: Английский

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Triplet State Suppression for Energy Loss Reduction in 20% Nonhalogenated Solvent Processed Binary Organic Solar Cells

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 16, 2025

Abstract Boosting power conversion efficiency (PCE) of organic solar cells (OSCs) has been restricted by its undesirably high energy loss, especially for those nonhalogenated solvent‐processed ones. Here,a dichloro‐methoxylated terminal group in an asymmetric small molecular acceptor design, which realizes a significantly reduced non‐radiative loss (0.179 eV) compared to symmetric counterpart (0.202 eV), is reported. Consequently, the device improved up 20% PM6:BTP‐eC9‐4ClO, without sacrificing photon harvest or charge transport ability control system PM6:BTP‐eC9. Further characterizations reveal BTP‐eC9‐4ClO's blend film demonstrates suppressed triplet state formation, enabled enhanced electron delocalization. In addition, BTP‐eC9‐4ClO found be thermally stabler than BTP‐eC9, and thus providing stability, whose T80 value reaches > 7800 h under 80 °C anneal N 2 via linear extrapolation. This work represents state‐of‐the‐art performance binary OSCs with certified results (19.45%).

Язык: Английский

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Modulating Aggregation Behavior by Ternary Strategies for Efficient and Stable Thick‐Film Organic Solar Cells

Small, Год журнала: 2024, Номер unknown

Опубликована: Окт. 12, 2024

Abstract Functional third components targeted to improve a specific property of organic solar cells is an effective strategy. However, introducing component simultaneously efficiency and stability achieve good performance in thick‐film devices has rarely been reported. Herein, low diffusion IDCN ID2CN are reported power conversion (PCE) 18.08% high short‐circuit current ( J SC ) 27.82 mA cm −2 , one the highest values based on PM6:Y6. They increase light harvesting range 400–500 nm while enhancing energy transfer via Förster resonance (FRET). A tightly ordered molecular arrangement achieved by modulating preaggregation film formation kinetics Y6, which enhance exciton dissociation charge transport. Moreover, low‐diffusion can effectively restrict Y6 morphology stability, T 90 lifetime increased from 689 1545 h. In 300 devices, PM6:ID2CN:Y6 achieves PCE 15.01%, much higher than PM6:Y6's 12.83%, demonstrating great potential devices.

Язык: Английский

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Outside-bay methoxy-modified perylenediimide dimeric acceptors: Synthesis and importance of central vinylene linker

Materials Today Communications, Год журнала: 2025, Номер unknown, С. 111779 - 111779

Опубликована: Янв. 1, 2025

Язык: Английский

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Star‐Shaped Beta‐Substituted Porphyrins with Four DPP Arms for Organic Solar Cells

Asian Journal of Organic Chemistry, Год журнала: 2025, Номер unknown

Опубликована: Март 10, 2025

Abstract Porphyrins are a very important class of chromophores that have been widely applied in many fields. In recent years, the porphyrins functionalized at meso‐positions made much progress photovoltaic fields, including photodetectors, dye‐sensitized solar cells (DSSCs) and organic (OSCs). order to explore relationship between new chemical structures properties porphyrins, herein, two star‐shaped β ‐substituted 4 ‐EDPP‐Por ‐DPP‐Por with four DPP arms linked 2, 8, 12, 18‐ ‐positions porphyrin core by ethynylenes single‐bonds, respectively, designed synthesized for OSCs. The exhibit absorption spectra, energy level arrangements, molecular configurations different from those A−D‐A‐type molecules previously meso‐positions. power conversion efficiencies (PCEs) all‐small‐molecule (ASM‐OSCs) based on active layers ‐EDPP‐Por:Y6 ‐DPP‐Por:Y6 5.64 % 6.96 %, respectively. This study enriches diversity optoelectronic materials provides practical approach developing small molecule donor optoelectronics.

Язык: Английский

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Rational design and DFT-based study of non-fullerene acceptors for high-performance organic solar cells: End-cap and Core modifications for enhanced charge transfer

Computational and Theoretical Chemistry, Год журнала: 2025, Номер unknown, С. 115209 - 115209

Опубликована: Март 1, 2025

Язык: Английский

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End-Group Modulation in a High Electron Mobility Y-Series Nonfullerene Acceptor Achieved Based on the DFT Method

ACS Omega, Год журнала: 2025, Номер unknown

Опубликована: Апрель 13, 2025

The joining of Y6 has effectively promoted the power conversion efficiency (PCE) organic solar cells, and impact its end-group modification on PCE is significant. Here, eight different groups are introduced to modify Y6, forming acceptors named V1, V2, V3, V4, V5, V6, V7, R. excited states, light absorption properties, intermolecular electron transfer discussed by density functional theory. state, average local ionization energy, Hirshfeld population, potential, affinity, mobility also calculated. Results show that V7 obtains largest red-shift in UV-visible spectra (787.55 nm). V5 have better electronic coupling while exhibiting leading (0.9577 0.4383 cm2 V-1 s-1). Acceptors with rigid skeletons, good planarity, minimal steric hindrance, locally uniform ALIE distributions potential achieve higher mobility. These results indicate precise engineering can regulate acceptors, thereby increasing PCE.

Язык: Английский

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Simultaneously improving efficiency and stability of organic solar cells by enhancing molecular crystallinity and intermolecular interactions

Science China Materials, Год журнала: 2024, Номер unknown

Опубликована: Авг. 23, 2024

Язык: Английский

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A-A′-A structured methoxy-modified perylenediimide dimeric acceptors at the outside-bay position: Synthesis, spectroscopic property and photovoltaic application

Materials Today Communications, Год журнала: 2024, Номер 41, С. 110977 - 110977

Опубликована: Ноя. 13, 2024

Язык: Английский

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