High-Strength and Excellent Self-Healing Polyurethane Elastomer Based on Rigid Chain Segment Reinforcement

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

Published: Jan. 24, 2025

Owing to their extensive application scope, elastomers that combine high strength and excellent self-healing efficiency have always attracted significant attention are still a contradiction. In this study, novel PU elastomer was prepared by combining rigid poly(amic acid) (PAA) chain segments 3,3-dithiodipropionic dihydrazide (DPH) containing sextuple hydrogen-bonding units disulfide bonds. The exhibited tensile of 50.1 MPa toughness 144.2 MJ/m3. PAA serve as framework, significantly enhancing the mechanical elastomer. Meanwhile, DPH with bonds enabled exhibit an 96.1% after 12 h at 80 °C. Additionally, strong reversible cross-linking arrays in endows it strength, ability, recyclability, allowing be recycled hot pressing dissolution.

Language: Английский

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Enhancing the Thermal Stability of Organic Solar Cells by Locking Morphology with Ethyl Cellulose Additive

Solar RRL, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 5, 2025

The morphology of active layer the organic solar cells (OSCs) tends to transition toward its lowest energy conformation under thermal stress, significantly limiting stability OSCs. In this study, ethyl cellulose (EC) is utilized as an additive in typical PM6:Y6 and other systems. Due strong interaction between hydroxyl groups EC heteroatoms semiconductors, their bulk heterojunction nanomorphology locked, thereby enhancing device stability. Under stress at 65 °C for 1,000 h, incorporating demonstrates excellent nearly without performance loss. Furthermore, compared control device, exhibits improved a range more stringent aging conditions. Additionally, shows broad applicability various systems, effectively This work offers promising approach developing stable structures

Language: Английский

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High Cell to Module Efficiency Remaining Ratio of ≈90% for the 100 cm² Fully Roll‐to‐Roll Gravure Printed Flexible Organic Solar Cells From Non‐Halogenated Solvent

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

Published: March 17, 2025

Abstract The cell‐to‐module (CTM) efficiency remaining ratio from monolithic device to large‐area module indicates the scalability potential for organic solar cells (OSCs). Nowadays, CTM value is still low as area increases larger than 100 cm 2 . In this work, crucial role of solvent in printing, which on one side influenced large homogeneity due ink rheology property, and other impacted phase separation dynamics because vaporization crystalline rate highlighted. films TMB show excessive pure printing line defects vertical direction slow volatilization speed adhesion, while Tol‐based present along surface adhesion are demonstrated. contrast, non‐halogenated solvent, o‐XY exhibited a suitable size excellent homogeneity. Consequently, fully printed 1 FOSCs exhibit an 14.81%. Moreover, with 28–104 gives over 13%, 0.9. Selecting solvents achieve uniformity appropriate morphology >100 modules great importance industrialization FOSCs.

Language: Английский

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Advancing Intrinsically Stretchable Organic Photovoltaics with a Nearly Amorphous Polymer Semiconductor

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

Published: April 7, 2025

Abstract Current state‐of‐the‐art organic photovoltaic (OPV) films, composed of conjugated polymer donors and small molecule acceptors, are often limited by the high brittleness their rigid backbones, which restricts application in wearable devices. In contrast, all‐polymer OPVs have demonstrated enhanced intrinsic stretchability, but further advancements necessary to meet demands. Here, an uncharted strategy is reported enhance mechanical stretchability performance incorporating a nearly‐amorphous polymer, poly(indacenodithiophene‐co‐benzothiadiazole) (IDTBT) into layer‐by‐layer structured active layer. IDTBT possesses fracture strain ≈80%, significantly outperforming well‐known donor polymers like PM6. The incorporation enhances properties, with both optimized at low contents. More importantly, intrinsically stretchable demonstrate superior stability impressive power conversion efficiency 14.2%, highest date this category. Particularly, IDTBT‐strengthened retain 72% initial under tensile 50%, 68% even after being stretched hundreds times 30% strain, demonstrating exceptional stability. This approach underscores potential semiconductors designing highly OPVs, paving way for seamless integration electronics.

Language: Английский

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Organic solar cells: beyond 20%

Science China Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 30, 2025

Language: Английский

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Emerging flexible photovoltaic technology: From materials to devices

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

Published: May 9, 2025

Abstract The third‐generation photovoltaic technologies such as perovskite solar cells and organic cells, have low‐temperature solution‐processing ability, flexibility lightweight, which is expected to be developed into a wearable device that fits the human body. Here, flexible substrates, transparent electrode materials, materials devices for are systematically introduced. First, substrates regarding their suitability provided. Then, research progress of commonly used electrodes reviewed, including poly(3,4‐ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS), metal nanowires, carbon‐based composite materials. Next, we summarize how realize optimize devices, balance power conversion efficiency mechanical stability device. Finally, propose several promising directions intrinsically cells.

Language: Английский

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