Photoelectric and flexible poly(styrene-<i>b</i>-ethylene/butylene-<i>b</i>-styrene)-zinc porphyrin–graphene hybrid composite: synthesis, performance, and mechanism

Tang, Shumei; Xu, Yu; Su, Gehong; Bao, Jianjun; Zhang, Aiming

doi:10.1039/c8ra07003b

Cited by 10 publications

(3 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Owing to its soft nature and excellent aging resistance, SEBS has been widely used and can be easily accessible. [ 47 ] Figure 1c presented the stress–strain curve of SEBS ( M n = 153 kg mol −1 ) primarily used in this research. The fracture strain is as high as ≈1050% and two orders of magnitude higher than that of neat PM6, indicating that SEBS exhibits a remarkable ductility.…”

Section: Resultsmentioning

confidence: 99%

“…Owing to its soft nature and excellent aging resistance, SEBS has been widely used and can be easily accessible. [47] Figure 1c The fracture strain is as high as ≈1050% and two orders of magnitude higher than that of neat PM6, indicating that SEBS exhibits a remarkable ductility. The elastic modulus of SEBS is determined to be 1.3 MPa, which is two to three orders of magnitude lower than those of common conjugated polymers.…”

Section: Mechanical Properties Of Ternary Blend Filmsmentioning

confidence: 96%

See 1 more Smart Citation

Thermoplastic Elastomer Tunes Phase Structure and Promotes Stretchability of High‐Efficiency Organic Solar Cells

et al. 2021

View full text Add to dashboard Cite

the power conversion efficiencies (PCEs) of OSCs show rapid increase and the values have increased to over 18%. [16][17][18][19][20][21][22][23][24] However, owing to the brittle nature of small molecules, [25] the mechanical properties of polymer:NF-SMA blends are generally insufficient and can hardly meet the requirement of stretchable electronics. [26,27] The mechanical imperceptibility of OSCs requires low stiffness and high extensibility for wearable and portable applications. The human skin exhibits a ductility of about 30%, which is the benchmark for skin-wearable devices. [28] Studies have been carried out to determine the mechanical properties of nonfullerene OSCs [29][30][31] and drive the development of stretchable OSCs. [32][33][34][35] For instance, the fracture strain of the well-known PTB7-Th:(3,9-bis(2-methylene-(3-(1,1dicyanomethylene)-indanone))-5,5,11,11tetrakis(4-hexylphenyl)-dithieno[2,3-d:2′,3′-d′]-s-indaceno[1,2-b:5,6-b′]dithiophene) (ITIC) blend films decreased dramatically with the increase of ITIC, and the blend films became significantly stiffer as a result of increased elastic modulus. [26,36] Therefore, methods should be adopted to improve the stretchability and reduce the stiffness of OSCs based on polymer:NF-SMA blends.As the mechanical performance of polymer:NF-SMA blends are often poor, a representative high-efficiency Top-performance organic solar cells (OSCs) consisting of conjugated polymer donors and nonfullerene small molecule acceptors (NF-SMAs) deliver rapid increases in efficiencies. Nevertheless, many of the polymer donors exhibit high stiffness and small molecule acceptors are very brittle, which limit their applications in wearable devices. Here, a simple and effective strategy is reported to improve the stretchability and reduce the stiffness of highefficiency polymer:NF-SMA blends and simultaneously maintain the high efficiency by incorporating a low-cost commercial thermoplastic elastomer, polystyrene-block-poly(ethylene-ran-butylene)-block-polystyrene (SEBS). The microstructure, mechanical properties, and photovoltaic performance of PM6:N3 with varied SEBS contents and the molecular weight dependence of SEBS on microstructure and mechanical properties are thoroughly characterized. This strategy for mechanical performance improvement exhibits excellent applicability in some other OSC blend systems, e.g., PBQx-TF:eC9-2Cl and PBDB-T:ITIC. More crucially, the elastic modulus of such complex ternary blends can be nicely predicted by a mechanical model. Therefore, incorporating thermoplastic elastomers is a widely applicable and cost-effective strategy to improve mechanical properties of nonfullerene OSCs and beyond.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Mechanical Properties Of Ternary Blend Filmsmentioning

confidence: 96%

Thermoplastic Elastomer Tunes Phase Structure and Promotes Stretchability of High‐Efficiency Organic Solar Cells

et al. 2021

View full text Add to dashboard Cite

show abstract

“…[ 4 ] One of the promising strategies to reinforce the mechanical robustness of PSCs is incorporating elastomers (i.e., poly(dimethylsiloxane) (PDMS) and styrene–ethylene–butylene–styrene (SEBS)) into the P D :SMA blend films. [ 5 ] These elastomers can increase the stretchability of the blend films due to their higher stretchability (>100–200%) compared to rigid conjugated materials. For example, Chen et al demonstrated that the addition of poly(dimethylsiloxane‐ co ‐methyl phenethylsiloxane) elastomer in all‐polymer blends effectively increased the stretchability of blend films.…”

Section: Introductionmentioning

confidence: 99%

Poly(dimethylsiloxane)‐block‐PM6 Polymer Donors for High‐Performance and Mechanically Robust Polymer Solar Cells

et al. 2023

View full text Add to dashboard Cite

High power conversion efficiency (PCE) and stretchability are the dual requirements for the wearable application of polymer solar cells (PSCs). However, most efficient photoactive films are mechanically brittle. In this work, highly efficient (PCE = 18%) and mechanically robust (crack‐onset strain (COS) = 18%) PSCs are acheived by designing block copolymer (BCP) donors, PM6‐b‐PDMSx (x = 5k, 12k, and 19k). In these BCP donors, stretchable poly(dimethylsiloxane) (PDMS) blocks are covalently linked with the PM6 blocks to effectively increase the stretchability. The stretchability of the BCP donors increases with a longer PDMS block, and PM6‐b‐PDMS19k:L8‐BO PSC exhibits a high PCE (18%) and 9‐times higher COS value (18%) compared to that (COS = 2%) of the PM6:L8‐BO‐based PSC. However, the PM6:L8‐BO:PDMS12k ternary blend shows inferior PCE (5%) and COS (1%) due to the macrophase separation between PDMS and active components. In the intrinsically stretchable PSC, the PM6‐b‐PDMS19k:L8‐BO blend exhibits significantly greater mechanical stability PCE80% ((80% of the initial PCE) at 36% strain) than those of the PM6:L8‐BO blend (PCE80% at 12% strain) and the PM6:L8‐BO:PDMS ternary blend (PCE80% at 4% strain). This study suggests an effective design strategy of BCP PD to achieve stretchable and efficient PSCs.

show abstract

Transient, Image‐Guided Gel‐Dissection for Percutaneous Thermal Ablation

Liu,

Russo,

Ellis

et al. 2024

Adv Healthcare Materials

View full text Add to dashboard Cite

Image‐guided tumor ablative therapies are mainstay cancer treatment options, but often require intra‐procedural protective tissue displacement to reduce the risk of collateral damage to neighboring organs. Standard of care (SoC) strategies, such as hydrodissection (fluidic injection), are limited by rapid diffusion of fluid and poor retention time, risking injury to adjacent organs, increased cancer recurrence rates from incomplete tumor ablations, and limited patient qualification. Herein, we developed “gel‐dissection,” a technique leveraging injectable hydrogels for longer‐lasting, shapeable, and transient tissue separation, empowering clinicians with improved ablation operation windows and greater control. A rheological model was designed to understand and tune gel‐dissection parameters. In swine models, gel‐dissection achieved 24 times longer‐lasting tissue separation dynamics compared to saline, with 40% less injected volume. Gel‐dissection achieved anti‐dependent dissection between free‐floating organs in the peritoneal cavity and clinically significant thermal protection, with the potential to expand minimally invasive therapeutic techniques, especially across locoregional therapies including radiation, cryoablation, endoscopy, and surgery.This article is protected by copyright. All rights reserved

show abstract

Photoelectric and flexible poly(styrene-b-ethylene/butylene-b-styrene)-zinc porphyrin–graphene hybrid composite: synthesis, performance, and mechanism

Abstract: Stretchable and flexible photoelectric materials are highly desirable for the development of artificial intelligence products.

Cited by 10 publications

References 41 publications

Thermoplastic Elastomer Tunes Phase Structure and Promotes Stretchability of High‐Efficiency Organic Solar Cells

Thermoplastic Elastomer Tunes Phase Structure and Promotes Stretchability of High‐Efficiency Organic Solar Cells

Poly(dimethylsiloxane)‐block‐PM6 Polymer Donors for High‐Performance and Mechanically Robust Polymer Solar Cells

Transient, Image‐Guided Gel‐Dissection for Percutaneous Thermal Ablation

Contact Info

Product

Resources

About