Two Donor/Acceptor Copolymers Based on Pentylhexyl-Functionalised Dithienopyrrole for Application in Organic Solar Cells

Arabian Journal for Science and Engineering, Год журнала: 2025, Номер unknown

Опубликована: Янв. 6, 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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High‐Molecular‐Weight Polymer Donors Based on Bithiophene Imide for High‐Efficiency and Durable All‐Polymer Solar Cells

Advanced Materials Technologies, Год журнала: 2025, Номер unknown

Опубликована: Апрель 16, 2025

Abstract High‐molecular‐weight (high‐MW) polymer semiconductors are pivotal in advancing all‐polymer solar cells (all‐PSCs), known for their excellent device stability and mechanical resilience. However, the development of high‐MW donors ( P D s) faces challenges due to scarcity suitable backbones that ensure both high MW optimal solubility, along with well‐controlled miscibility acceptors A s). Herein, a series bithiophene imide (BTI)‐based s number‐average molecular weights ranging from 120.3 145.5 kDa developed, offering improved aggregation property optimized : miscibility. Notably, PBTI‐OD, featuring 2‐octadecyldodecyl side chain on BTI moiety, exhibited superior blending character morphology s, outperforming its 2‐hexyldecyl 2‐decyltetradecyl analogues (PBTI‐HD PBTI‐DT). As result, PBTI‐OD achieved impressive power conversion efficiencies 18.47% 19.20% binary ternary devices, respectively. Furthermore, progressive enhancement robustness is realized PBTI‐HD PBTI‐DT, enabled by longer alkyl higher MW. These results underscore great potential BTI‐based construct highly efficient durable all‐PSCs, paving way next‐generation energy technologies.

Язык: Английский

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High-Performance, Ambient-Processable Organic Solar Cells Achieved by Single Terpene-Based Entirely Eco-Friendly Process

Journal of Materials Chemistry A, Год журнала: 2024, Номер unknown

Опубликована: Янв. 1, 2024

We developed entirely eco-friendly organic solar cells using eucalyptol (Eu) as a single terpene solvent, achieving record-high PCE (15.1%). The Eu processing enables fabrication in air and enhances stability, promising for sustainable production.

Язык: Английский

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