Polymer Donor with a Simple Skeleton and Minor Siloxane Decoration Enables 19% Efficiency of Organic Solar Cells

Advanced Materials, Год журнала: 2024, Номер 36(16)

Опубликована: Янв. 18, 2024

Abstract Development of polymer donors with simple chemical structure and low cost is great importance for commercial application organic solar cells (OSCs). Here, side‐chain random copolymer PMQ‐Si605 a simply 6,7‐difluoro‐3‐methylquinoxaline‐thiophene backbone 5% siloxane decoration side chain synthesized in comparison its alternating PTQ11. Relative to molecular weight ( M n ) 28.3 kg mol −1 PTQ11, the minor beneficial achieving higher up 51.1 . In addition, can show stronger aggregation ability faster charge mobility as well more efficient exciton dissociation active layer revealed by femtosecond transient absorption spectroscopy. With L8‐BO‐F acceptor, based OSCs display power conversion efficiency (PCE) 18.08%, much than 16.21% PTQ11 devices. another acceptor BTP‐H2 optimize photovoltaic performance PMQ‐Si605, further elevated PCEs 18.50% 19.15% be achieved binary ternary OSCs, respectively. Furthermore, layers are suitable processing high humidity air, an important factor massive production OSCs. Therefore, on promising, affording high‐performing candidate.

Язык: Английский

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Intrinsically Stretchable Organic Photovoltaic Cells with Improved Mechanical Durability and Stability via Dual‐Donor Polymer Blending

Advanced Functional Materials, Год журнала: 2024, Номер 34(29)

Опубликована: Фев. 8, 2024

Abstract Intrinsically stretchable organic photovoltaic cells (OPVs) have garnered significant attention as crucial devices for powering next‐generation wearable electronics. Despite the rapid power conversion efficiency gains in champion OPVs, their brittle stretchability has failed to meet demands of Internet Things era, severely hindering further development and practical applications. In this regard, a new dual‐donor polymer blending strategy is demonstrated constructing intrinsically OPVs by designing novel high‐molecular–weight conjugated PM6‐HD. This PM6 derivative featuring long alkyl chains can reach sufficiently high molecular weight thus exhibits fracture strain exceeding 90%, which ≈12 times higher than benchmark PM6. Synergistic optimization mechanical properties performance polymer:small molecule all‐polymer systems constructed from physical blends PM6‐HD achieved. Crucially, resulting OPV demonstrates excellent stability, with record PCE 80% 50.3% retention above even after 1000 cycles cyclic stretching at strains. work contributes advancement technology opens up possibilities its integration into electronic devices.

Язык: Английский

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High efficiency and thermally stable ternary all-polymer solar cells achieved by alloyed vinyl-linked polymerized small-molecule acceptors

Nano Energy, Год журнала: 2024, Номер 122, С. 109338 - 109338

Опубликована: Янв. 25, 2024

Язык: Английский

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Sequentially Deposited Elastomer‐Based Ternary Active Layer for High‐Performance Stretchable Organic Solar Cells

Advanced Functional Materials, Год журнала: 2024, Номер 34(22)

Опубликована: Фев. 6, 2024

Abstract Stretchable organic solar cells (OSCs) with high power conversion efficiency and good mechanical deformation are promising as sources for wearable electronics. However, synergistic improvement of both photovoltaic ductility is challenging state‐of‐the‐art polymer donor: non‐fullerene acceptor (NFA)‐based active layers. Here, a high‐performance stretchable OSC 16.54% crack‐onset strain 26.38% by synergetic optimization film microstructure sequentially deposited ternary layer consisting donor poly[2,6‐(4,8‐bis(5‐(2‐ethylhexyl‐3‐fluoro)thiophen‐2‐yl)‐benzo[1,2‐b:4,5‐b']dithiophene))‐alt‐5,5'‐(5,8‐bis(4‐(2‐butyloctyl)thiophen‐2‐yl)dithieno[3',2':3,4;2'',3'':5,6]benzo[1,2‐c][1,2,5]thiadiazole)] (D18), an NFA 2,2'‐((2Z,2'Z)‐((12,13‐bis(2‐ethylhexyl)‐3,9‐diundecyl‐12,13‐dihydro‐[1,2,5]thiadiazolo[3,4‐e]thieno[2'',3'':4',5']thieno[2',3':4,5]pyrrolo[3,2‐g]thieno[2',3':4,5]thieno[3,2‐b]indole‐2,10‐diyl)bis(methanylylidene)bis(5,6‐difluoro‐3‐oxo‐2,3‐dihydro‐1H‐indene‐2,1‐diylidene))dimalonitrile) (Y6), elastomer polystyrene‐block‐poly(ethylene‐ran‐butylene)‐block‐polystyrene (SEBS) reported. Adding low‐content solvent additive para‐xylene into main carbon disulfide induces high‐density fibers networks low crystallinity in bottom D18 layer, this further suppresses the large phase separation between Y6 SEBS top layer. Moreover, incorporating solid 1,3‐dibromo‐5‐chlorobenzene better compatibility can promote dispersions to form smaller ordered domains matrix. Finally, optimal shows significantly higher stretchability, resulting efficiency‐stretchability factor 4.36%, which among best values OSCs.

Язык: Английский

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Unveiling the Strain‐induced Microstructural Evolution and Morphology‐Stretchability Correlations of Intrinsically Stretchable Organic Photovoltaic Films

Advanced Energy Materials, Год журнала: 2024, Номер 14(18)

Опубликована: Фев. 9, 2024

Abstract The progress of stretchable and wearable photovoltaics relies heavily on intrinsically active layer films. Nevertheless, there is a paucity research clarifying the connections between their microstructure, performance, adaptation to large strain in polymer electronic current study utilizes multiple synchrotron X‐ray scattering methods collectively examine correlations morphology stretchability, as well microstructural evolution induced by stretching three sample cases highly ternary blend These blends contain over 30% weight elastomer, such styrene‐ethylene‐butylene‐styrene block copolymer, integrated into high‐performance polymer:nonfullerene small molecule mixture. Specifically, real‐time changes these durable organic photovoltaic films with elastomers are monitored when subjected tensile through situ scattering. experiments demonstrate that polymeric can effectively lower degree crystallinity deform crystallites semiconductor molecules. elastomeric component aids stress dispersion during stretching, thereby improving durability This provides new recommendations for advancing optoelectronic devices.

Язык: Английский

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Self‐Healing Elastic Electronics: Materials Design, Mechanisms, and Applications

Advanced Functional Materials, Год журнала: 2024, Номер 34(27)

Опубликована: Март 3, 2024

Abstract Traditional electronic devices inevitably undergo degradation over time due to deformation, fatigue, or mechanical damage, ultimately resulting in device failure. To overcome this issue, researchers have pioneered the field of elastic electronics, incorporating higher tensile properties strain resistance into devices. Elastic materials, especially self‐healing elastomers (SHEs) are regarded as a crucial component offering potential for restoring functionality and prolonging lifespan SHEs possess remarkable ability tolerate significant deformation utilize intrinsic dynamic chemical bonds autonomously repair themselves from varying degrees damage. The acquisition is key development electronics has attracted global attention. This review offers comprehensive overview current advancements electronics. First, various mechanisms present elastomeric material systems summarized. Second, design strategies constructing based on reviewed detail, with particular emphasis covalent non‐covalent bonds. Subsequently, optoelectronic applications Finally, challenges prospects that lie ahead order foster further rapidly growing outlined.

Язык: Английский

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High-performance intrinsically stretchable organic solar cells based on flexible spacer incorporated dimerized small-molecule acceptors

Nano Energy, Год журнала: 2024, Номер 125, С. 109541 - 109541

Опубликована: Март 26, 2024

Язык: Английский

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Mechanically robust and stretchable organic solar cells plasticized by small-molecule acceptors

Science, Год журнала: 2025, Номер 387(6732), С. 381 - 387

Опубликована: Янв. 23, 2025

Emerging wearable devices would benefit from integrating ductile photovoltaic light-harvesting power sources. In this work, we report a small-molecule acceptor (SMA), also known as non–fullerene (NFA), designed for stretchable organic solar cell ( s -OSC) blends with large mechanical compliance and performance. Blends of the organosilane-functionalized SMA BTP-Si4 polymer donor PNTB6-Cl achieved conversion efficiency (PCE) >16% ultimate strain (ε u ) >95%. Typical SMAs suppress OSC blend ductility, but addition enhances it. Although is less crystalline than other SMAs, it retains considerable electron mobility highly miscible essential enhancing ε . Thus, -OSCs PCE > 14% operating normally under various deformations (>80% retention an 80% strain) were demonstrated. Analysis several SMA-polymer revealed general molecular structure–miscibility–stretchability relationships designing blends.

Язык: Английский

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Thorough Optimization for Intrinsically Stretchable Organic Photovoltaics

Advanced Materials, Год журнала: 2023, Номер 36(11)

Опубликована: Дек. 15, 2023

Abstract The development of intrinsically stretchable organic photovoltaics ( is ‐OPVs) with a high efficiency significance for practical application. However, their efficiencies lag far behind those rigid or even flexible counterparts. To address this issue, an advanced top‐illuminated OPV designed and fabricated, which has performance, through systematic optimizations from material to device. First, the stretchability active layer largely increased by adding low‐elastic‐modulus elastomer styrene‐ethylene‐propylene‐styrene tri‐block copolymer (SEPS). Second, conductivity opaque electrode are enhanced conductive polymer/metal (denoted as M‐PH1000@Ag) composite strategy. Third, optical electrical properties sliver nanowire transparent improved solvent vapor annealing High‐performance ‐OPVs successfully fabricated structure, provides record‐high 16.23%. Additionally, incorporating 5–10% elastomer, balance between achieved. This study valuable insights into device high‐efficiency ‐OPVs, low‐cost production excellent stretchability, indicates potential future applications OPVs.

Язык: Английский

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Establishing Co‐Continuous Network of Conjugated Polymers and Elastomers for High‐Performance Polymer Solar Cells with Extreme Stretchability

Advanced Energy Materials, Год журнала: 2024, Номер 14(26)

Опубликована: Май 13, 2024

Abstract High power conversion efficiency (PCE) and mechanical robustness are prerequisites for wearable applications of organic solar cells (OSCs). However, stretchability present active systems (i.e., crack‐onset strain (COS) < 30%) should be improved. While introducing elastomers into is considered a simple method improving stretchability, the inclusion typically results in decrease PCE OSC with limited enhancement due to lack interconnected electrical pathways. In this study, it developed efficient intrinsically stretchable (IS)‐OSCs exceptional robustness, by constructing co‐continuous networks conjugated polymers (D18) (SEBS) within layers. It demonstrated that blend film specific ratio (40:60 w/w) D18:SEBS crucial forming structures, establishing well‐connected channels. Consequently, D18 0.4 :SEBS 0.6 /L8‐BO OSCs achieve 16‐times higher (COS = 126%) than based on D18/L8‐BO 8%), while achieving 4‐times (12.13%) compared SEBS‐rich layers (D18 0.2 0.8 /L8‐BO, 3.15%). Furthermore, ‐based IS‐OSCs preserve 86 90% original PCEs at 50% after 200 stretching/releasing cycles 15% strain, respectively, demonstrating highest among reported IS‐OSCs.

Язык: Английский

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