Intrinsically Stretchable Organic Solar Cells and Sensors Enabled by Extensible Composite Electrodes

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(44)

Published: Aug. 7, 2024

Abstract Stretchable electrodes are critical to the development of advanced technologies such as human–machine interaction, flexible sensing, and wearable power supply, making them significant research value. However, current preparation methods for high‐performance stretchable complex inefficient, posing challenges their large‐scale application in realm wearables. To address this need, a straightforward efficient embedding strategy is reported fabricating silver nanowire/thermoplastic elastomer composite (referred Strem‐AT) utilizing viscoelasticity outstanding mechanical properties polymer elastomers achieve extensibility, conductivity, smooth surface. These exhibit excellent tensile behavior, low surface roughness, stable electrical properties, enabling successful integration into sensors intrinsically organic photovoltaic cells (IS‐OPV). When applied human skin joints motion detection, sensor demonstrates remarkable stretchability signal output. Importantly, all‐polymer IS‐OPV exhibits top‐notch conversion efficiency (PCE) >12.5% PCE 80% strain exceeding 50%. Furthermore, even after subjecting high‐strain stretching at 50% 1000 cycles, can retain 76% initial PCE. This study presents multifunctional electrode with high repeatability easy‐to‐scale fabrication photovoltaics.

Language: Английский

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A Three‐in‐One Hybrid Strategy for High‐Performance Semiconducting Polymers Processed from Anisole

Advanced Science, Journal Year: 2024, Volume and Issue: 11(25)

Published: April 22, 2024

Abstract The development of semiconducting polymers with good processability in green solvents and competitive electrical performance is essential for realizing sustainable large‐scale manufacturing commercialization organic electronics. A major obstacle the processability‐performance dichotomy that dictated by lack ideal building blocks balanced polarity, solubility, electronic structures, molecular conformation. Herein, through integration donor, quinoid acceptor units, an unprecedented block, namely TQBT, introduced constructing a serial conjugated polymers. distinct non‐symmetric structure high dipole moment, imparts enhanced solubility anisole—a solvent—to polymer TQBT‐T. Furthermore, PTQBT‐T possess highly rigid planar backbone owing to nearly coplanar geometry quinoidal nature resulting strong aggregation solution localized aggregates film. Remarkably, films spuncast from anisole exhibit hole mobility 2.30 cm 2 V ‐1 s , which record solvent‐processable via spin‐coating, together commendable operational storage stability. hybrid block emerges as pioneering electroactive unit, shedding light on future design strategies high‐performance compatible processing marking significant stride towards ecofriendly

Language: Английский

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Fine‐Tuning Intra/Inter‐Molecular Interaction via Ternary Copolymerization Strategy to Obtain Efficient Polymer Donors

Small, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 5, 2025

Incorporating a third component through ternary copolymerization strategy has proven to be promising and effective approach for further improving the device performance of polymer donors. However, terpolymer donors typically exhibit negative effects on molecular stacking weaken charge transport due irregular distribution skeleton. Herein, two terpolymers PBBQ-5 (5% ff-Qx) PBBQ-10 (10% are developed by introducing difluoro-2-(3-hexyldecyloxy) quinoxaline (ff-Qx) main chain PM6. The introduction ff-Qx unit not only enables possess N···S noncovalent intramolecular interactions that contribute enlarge planarity enhance interaction but also can fine-tuning electrostatic potential (ESP) values related polymers, thereby regulate intermolecular with acceptor force. After blending L8-BO, PBBQ-5:L8-BO-based blend film exhibits appreciated miscibility, desirable phase separation sizes, more ordered packing than analogs. Consequently, an impressive power conversion efficiency (PCE) as high 19.54% is realized in PBBQ-5-based devices, which set new record Qx-based solar cells. work emphasizes drawbacks provides pathway developing high-performance optimizing intra/inter-molecular interaction.

Language: Английский

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Halogen-Free Wide Band Gap Polymer Donors Based on Dicyanobithiophene for Efficient Organic Solar Cells

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 15, 2025

Conjugated polymer donors have always been one of the important components organic solar cells (OSCs), particularly those featuring simple synthetic routes, proper energy levels, and appropriate aggregation behavior. In this work, we employed a nonfused electron-deficient building block, dicyanobithiophene (2CT), for constructing high-performance donors. Combining with side-chain engineering, two novel halogen-free donors, PB2CT-BO PB2CT-HD, were reported. shorter alkyl chains on thiophene π bridges exhibited enhanced packing ordering improved crystallinity. When paired BTP-CN-HD as electron acceptor, PB2CT-BO-based OSC attained an impressive power conversion efficiency (PCE) 14.2% within bulk-heterojunction (BHJ) configuration. Additionally, active layers refined through layer-by-layer (LbL) approach, leading to more organized molecular fibrillar network. Consequently, employing processed LbL approach achieved notable PCE 15.3%. This enhancement is credited reduced loss (Eloss) 0.514 eV formation favorable morphology. study highlights considerable promise 2CT unit in progression high-efficiency Eloss.

Language: Английский

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Morphological Stability of a Quinoxaline-Based Double-Cable Conjugated Polymer under Thermal Stress

ACS Applied Polymer Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 22, 2025

Language: Английский

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