Pre‐Endcapping of Hyperbranched Polymers toward Intrinsically Stretchable Semiconductors with Good Ductility and Carrier Mobility

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(19)

Published: Feb. 7, 2024

Abstract The advancement of semiconducting polymers stands as a pivotal milestone in the quest to realize wearable electronics. Nonetheless, endowing semiconductor with stretchability without compromising their carrier mobility remains formidable challenge. This study proposes “pre‐endcapping” strategy for synthesizing hyperbranched (HBSPs), aiming achieve balance between and organic findings unveil that aggregates formed by endcapped network structure not only ensure efficient charge transport but also demonstrate superior tensile resistance. In comparison linear conjugated polymers, HBSPs exhibit substantially larger crack onset strains notably diminished moduli. It is evident surpass counterparts terms both mechanical properties. Among HBSPs, HBSP‐72h‐2.5 out preeminent candidate within field inherently stretchable maintaining 93% its initial even when subjected 100% strain (1.41 ± 0.206 cm 2 V −1 s ). Furthermore, thin film devices remain stable after undergoing repeated stretching releasing cycles. Notably, mobilities are independent directions, showing isotropic behavior. preliminary makes this potential future design materials flexible electronic devices.

Language: Английский

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Insulator Polymer Matrix Construction on All‐Small‐Molecule Photoactive Blend Towards Extrapolated 15000 Hour T₈₀ Stable Devices

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(35)

Published: July 11, 2024

Abstract To boost the stability of all‐small‐molecule (ASM) organic photovoltaic (OPV) blends, an insulator polymer called styrene‐ethylene‐butylene‐styrene (SEBS) as morphology stabilizer is applied into host system small molecules BM‐ClEH:BO‐4Cl. Minor addition SEBS (1 mg/ml in solution) provides a significantly enhanced T 80 value 15000 hours (extrapolated), surpassing doping‐free (0 mg/ml) and heavy doping (10 counterparts (900 hours, 30 hours). The material reproducibility cost‐effectiveness active layer will not be affected by this industrially available polymer, where power conversion efficiency (PCE) can well maintained at 15.02%, which still decent for non‐halogen solvent‐treated ASM OPV. Morphological photophysical characterizations clearly demonstrate SEBS's pivotal effect on suppressing degradation donor blend film's crystallization/aggregation reorganization, protects exciton dynamics effectively. This work pays meaningful attention to stability, performs smart strategy suppress film degradation, releases comprehensive understanding mechanism device performance reduction.

Language: Английский

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Dynamic hydrogen-bonding enables high-performance and mechanically robust organic solar cells processed with non-halogenated solvent

Nature Communications, Journal Year: 2025, Volume and Issue: 16(1)

Published: Jan. 17, 2025

Developing active-layer systems with both high performance and mechanical robustness is a crucial step towards achieving future commercialization of flexible stretchable organic solar cells (OSCs). Herein, we design synthesize series acceptors BTA-C6, BTA-E3, BTA-E6, BTA-E9, featuring the side chains hexyl, 3, 6, 9 carbon-chain ethyl ester end groups respectively. Benefiting from suitable phase separation vertical distribution, PM6:BTA-E3-based OSCs processed by o-xylene exhibit lower energy loss improved charge transport characteristic achieve power conversion efficiency 19.92% (certified 19.57%), which stands as highest recorded value in binary green solvents. Moreover, due to additional hydrogen-bonding provided chain, enhanced stretchability thermal stability. Our work reveals significance dynamic improving photovoltaic performance, robustness, morphological stability OSCs.

Language: Английский

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Synthesis, characterization and performance evaluation of different alkyl chain lengths flame-retardant plasticizers for poly(vinyl chloride) derived from sustainable vanillic acid

European Polymer Journal, Journal Year: 2024, Volume and Issue: 214, P. 113154 - 113154

Published: May 19, 2024

Language: Английский

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Insulating Polymer Mediated Stability and Photovoltaic Performance of Organic Solar Cells: Influence of Molecular Weight

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(48)

Published: Aug. 5, 2024

Abstract Insulating polymers are promising components for constructing high performance organic solar cells (OSCs) due to their advantages including low cost, excellent mechanical properties, and feasibility in morphology modulation. However, few studies have been conducted on the effect of molecular weight insulating corresponding OSCs. In this work, polymethyl methacrylate (PMMA) with different (named as PMMA L H ) incorporated into a range polymer:nonfullerene photovoltaic systems. It is found that although both can suppress energetic disorder nonradiative energy loss, lead enhanced open‐circuit voltage OSCs, distinct property, operational stability well observed. modulate packing host more effectively its superior chain segment mobility during film‐forming process, which drive form ordered therefore performance. On other hand, better miscibility system, especially C5‐16 acceptor, be dispersed stable framework provides properties stability.

Language: Английский

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Binary Organic Solar Cells with over 19 % Efficiency and Enhanced Morphology Stability Enabled by Asymmetric Acceptors

Angewandte Chemie, Journal Year: 2024, Volume and Issue: 136(12)

Published: Jan. 30, 2024

Abstract The simultaneous improvement of efficiency and stability organic solar cells (OSCs) for commercialization remains a challenging task. Herein, we designed asymmetric acceptors DT‐C8Cl DT‐C8BTz with functional haloalkyl chains, in which the halogen atoms could induce noncovalent interactions heteroatoms like O, S, Se, etc ., thus leading to appropriately manipulated film morphology. Consequently, binary devices based on D18: achieved champion power conversion (PCE) 19.40 %. higher PCE be attributed enhanced π–π stacking, improved charge transport, reduced recombination losses. In addition, induced by chains effectively suppress unfavorable morphology evolutions thereby reduce trap density states, thermal storage stability. Overall, our findings reveal that rational design is novel powerful strategy simultaneously enhancing OSCs.

Language: Английский

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Synthesis, performance evaluation, and plasticization dynamics of biobased vanillic acid plasticizer for poly(vinyl chloride)

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 497, P. 154991 - 154991

Published: Aug. 23, 2024

Language: Английский

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A Pyrene‐Fused Dimerized Acceptor for Ternary Organic Solar Cells with 19% Efficiency and High Thermal Stability

Angewandte Chemie, Journal Year: 2023, Volume and Issue: 136(1)

Published: Nov. 21, 2023

Abstract A pyrene‐fused dimerized electron acceptor has been successfully synthesized and subsequently incorporated as the third component in ternary organic solar cells (OSCs). Diverging from traditional acceptors with a linear configuration, this novel displays distinctive “butterfly‐like” structure, comprising two Y‐acceptors wings fused pyrene‐based backbone. The extended π‐conjugated backbone electron‐donating nature of pyrene enable new to show low solubility, elevated glass transition temperature ( T g ), low‐lying frontier energy levels. Consequently, seamlessly integrates into OSCs, enhancing transporting properties, reducing non‐radiative voltage loss, elevating open‐circuit voltage. These merits have enabled OSCs an exceptional efficiency 19.07%, marked improvement compared 17.6% attained binary OSCs. More importantly, high exhibited by helps stabilize morphology photoactive layer thermal‐treated at 70 °C, retaining 88.7% over 600 hours. For comparison, experience decline 73.7% after same duration. results indicate that design incorporation unit is promising strategy development for

Language: Английский

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Toward Flexible and Stretchable Organic Solar Cells: A Comprehensive Review of Transparent Conductive Electrodes, Photoactive Materials, and Device Performance

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 10, 2024

Abstract Flexible and stretchable organic solar cells (FOSCs SOSCs) hold immense potential due to their versatility applicability in emerging areas such as wearable electronics, foldable devices, biointegrated systems. Despite these promising applications, several challenges remain, primarily related the mechanical durability, material performance, scalability required for commercialization. This review comprehensively highlights recent advancements design fabrication of FOSCs SOSCs, with a particular emphasis on key functional layers, including transparent conductive electrodes, interfacial photoactive materials, top electrodes. Innovations design, active layers electrodes improved flexibility, are discussed alongside developments device processes achieve power conversion efficiencies exceeding 19%. Furthermore, addresses remaining challenges, need scalable manufacturing techniques enhanced robustness under strain. Finally, prospects SOSCs analyzed, providing insights into how technologies can contribute development sustainable, high‐performance sources electronic devices other flexible electronics. offers valuable insights, bringing commercialization wearable, closer reality.

Language: Английский

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U‐Shaped Dimeric Acceptors for Balancing Efficiency and Stability in Organic Solar Cells

Advanced Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 27, 2024

Abstract Despite significant improvements in power conversion efficiencies (PCEs) of organic solar cells (OSCs), achieving excellent stability remains a great challenge to their commercial feasibility. Here, U ‐shaped dimeric acceptors (5‐IDT and 6‐IDT) with different molecular lengths are introduced into the binary OSCs as third component, respectively. The introduction component effectively reduces energetic disorder non‐radiative voltage losses improves exciton dissociation charge transport devices. Consequently, PCEs 6‐IDT‐ 5‐IDT‐treated significantly improved 19.32% 19.96%, respectively, which is highest PCE for oligomeric acceptors‐based ternary date. Meanwhile, thermal treated devices dramatically improved, initial efficiency retention increasing from 18% 32% 75%, after 1000 h stress. This mainly attributed ability smaller length 5‐IDT stabilize phase‐separated morphology polymeric donor small acceptor, rather than high glass transition temperature low diffusion coefficient.

Language: Английский

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