Achieving 20% Toluene-Processed Binary Organic Solar Cells via Secondary Regulation of Donor Aggregation in Sequential Processing

Nano-Micro Letters, Год журнала: 2025, Номер 17(1)

Опубликована: Апрель 1, 2025

Sequential processing (SqP) of the active layer offers independent optimization donor and acceptor with more targeted solvent design, which is considered most promising strategy for achieving efficient organic solar cells (OSCs). In SqP method, favorable interpenetrating network seriously depends on fine control bottom swelling. However, choice solvent(s) both have been mostly based a trial-and-error manner. A single often cannot achieve sufficient yet not excessive swelling, has long difficulty in high OSCs. Herein, two new isomeric molecules are introduced to fine-tune nucleation crystallization dynamics that allows judicious over swelling layer. The strong non-covalent interaction between molecule materials provides an excellent driving force optimize swelling-process. Among them, dipole moment promotes earlier PM6 extended time during SqP, improving bulk morphology vertical phase segregation. As result, champion efficiencies 17.38% 20.00% (certified 19.70%) achieved PM6/PYF-T-o (all-polymer) PM6/BTP-eC9 devices casted by toluene solvent.

Язык: Английский

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Optimizing bicontinuous network morphology by precisely regulating alkyl sulfur group side-chain for organic solar cells

Dyes and Pigments, Год журнала: 2025, Номер unknown, С. 112713 - 112713

Опубликована: Фев. 1, 2025

Язык: Английский

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Dual Side Chain Functionalization of Small Molecule Acceptors Affords High‐Performance Organic Solar Cells With Refined Blend Morphology

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Апрель 21, 2025

Abstract Regulating blend morphology in photoactive films is essential for enhancing the power conversion efficiency (PCE) of organic solar cells (OSCs). However, achieving precise control over remains a significant challenge due to difficulty simultaneously controlling thermodynamic and kinetic parameters that govern formation. In this study, series new small‐molecule acceptors (SMAs) employing dual side chain functionalization strategy designed incorporates trifluoromethyl (CF 3 ) phenyl (Ph) groups: SMA‐CH , SMA‐CF (with CF group), SMA‐Ph‐CF both groups). This approach successfully enables delicate tuning development high‐performance OSCs (PCE = 18.5%). enhances compatibility SMAs with hydrophobic D18 polymer donor, promoting formation intermixed donor/acceptor domains efficient charge generation. Meanwhile, improves SMA aggregation crystallinity, facilitating strong interconnected assembly transport. As result, binary based on D18:SMA‐Ph‐CF achieve significantly higher PCE 18.5%, compared 14.3% D18:SMA‐CH 16.5% D18:SMA‐CF OSCs. These results highlight importance optimizing

Язык: Английский

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Highly Planar Tetramer Acceptor Constructed by Vinyl Linkage Enables Organic Solar Cells with Outstanding Efficiency

Chemistry of Materials, Год журнала: 2025, Номер unknown

Опубликована: Апрель 28, 2025

Язык: Английский

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