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

Angewandte Chemie International Edition, Год журнала: 2023, Номер 63(1)

Опубликована: Ноя. 21, 2023

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 (Tg ), 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 Tg 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

Язык: Английский

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

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(12)

Опубликована: Янв. 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.

Язык: Английский

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Halogenation Strategy of Thiophene Derived Solvent Additives Enables Optimized Morphology for Organic Solar Cells with 19.17% Efficiency

Advanced Functional Materials, Год журнала: 2024, Номер 34(19)

Опубликована: Янв. 14, 2024

Abstract As simple and versatile tools, additives have been widely used to refine active layer morphology played a crucial role in boosting the power conversion efficiency (PCE) of organic solar cells (OSCs). Herein, three novel solvent named Th‐FSi, Th‐ClSi, Th‐BrSi with same backbone 2,5‐bis(trimethylsilyl)thiophene are designed synthesized by substituting different halogens fluorine, chlorine, bromine, respectively. Notably, Th‐ClSi exhibits more significant dipole moment engages non‐covalent interactions small‐molecule acceptor (SMA) L8‐BO, which slight adjustments intermolecular interaction, crystallinity, molecular packing PM6:L8‐BO layer. Consequently, OSCs incorporating outperform their Th‐FSi counterparts photo‐capturing, reduced energy loss, superior exciton dissociation, charge transfer properties, out‐coming yields an enhanced PCE 18.29%. Moreover, integrating near‐infrared absorbing SMA (BTP‐eC9) guest into matrix, absorption spectrum span 880–930 nm, resultant ternary achieve commendable 19.17%, ranking among highest efficiencies reported date is expanded. These findings underscore promise halogenated thiophene‐based as potent avenue for morphological fine‐tuning consequent enhancement OSCs.

Язык: Английский

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All-polymer solar cells with 19% efficiency via introducing pincer-shaped non-covalent bond interactions

Energy & Environmental Science, Год журнала: 2024, Номер 17(12), С. 4216 - 4227

Опубликована: Янв. 1, 2024

Pincer-shaped non-covalent bond interactions are introduced between a small-molecule additive and polymer acceptor, effectively improving the photovoltaic performance mechanical stability of all-polymer solar cells.

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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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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Ameliorated trap density and energetic disorder via a strengthened intermolecular interaction strategy to construct efficient non-halogenated organic solar cells

Energy & Environmental Science, Год журнала: 2024, Номер 17(15), С. 5542 - 5551

Опубликована: Янв. 1, 2024

The efficiency of non-halogenated organic solar cells is improved from 17.1% to 19.4% after dibenzyl ether (DBE) additive treatment. More strikingly, the thick-film devices achieved a champion 17.4%.

Язык: Английский

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Recent Advances in Polymorphism of Organic Solar Cells

Small, Год журнала: 2025, Номер unknown

Опубликована: Янв. 13, 2025

Abstract As organic solar cells (OSCs) achieve notable advancements, a significant consensus has been highlighted that the device performance is intricately linked to active layer morphology. With conjugated molecules being widely employed, intermolecular interactions exert substantial influence over aggregation state and morphology formation, resulting in distinct molecular packing motifs, also known as polymorphism. This phenomenon closely associated with processing conditions exerts profound impact on functional properties. Consequently, understanding mechanisms underlying polymorphism formation establishing definitive correlation between photophysical behavior crucial for driving high‐performance OSCs. In this review, comprehensive synthesis of recent developments provided emphasizing its pivotal role field OSC The thermodynamic kinetic principles governing are examined. Then, representative polymorphisms classified materials, segmenting them into homopolymers, copolymers, IDTT‐ BTP‐based small molecules. Additionally, prevalent strategies evaluated manipulating review culminates an analysis critical effects OSCs, including charge carrier characteristics, photovoltaic efficiency, long‐term stability. By offering novel perspectives practical insights, work seeks guide future efforts morphological optimization high‐efficiency

Язык: Английский

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

Nature Communications, Год журнала: 2025, Номер 16(1)

Опубликована: Янв. 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.

Язык: Английский

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How can we improve the stability of organic solar cells from materials design to device engineering?

Aggregate, Год журнала: 2024, Номер 5(5)

Опубликована: Апрель 22, 2024

Abstract Among a promising photovoltaic technology for solar energy conversion, organic cells (OSCs) have been paid much attention, of which the power conversion efficiencies (PCEs) rapidly surpassed over 20%, approaching threshold potential applications. However, device stability OSCs including storage stability, photostability and thermal remains to be an enormous challenge when faced with practical The major causes instability are rooted in poor inherent properties light‐harvesting materials, metastable morphology, interfacial reactions highly sensitive external stresses. To get rid these flaws, comprehensive review is provided about recent strategies methods improving from active layers, engineering encapsulation techniques high‐performance OSC devices. In end, prospectives next stage development devices satisfactory long‐term afforded community.

Язык: Английский

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