1,5-Diiodocycloctane: a cyclane solvent additive that can extend the exciton diffusion length in thick film organic solar cells

Energy & Environmental Science, Journal Year: 2024, Volume and Issue: 17(5), P. 1916 - 1930

Published: Jan. 1, 2024

The addition of cyclane 1,5-diiodocycloctane (DICO) provides critical roles in extending exciton diffusion length within active layer, consequently contributing to the improvement power conversion. efficiency thick film organic solar cells.

Language: Английский

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Cyano-functionalized pyrazine: an electron-deficient unit as a solid additive enables binary organic solar cells with 19.67% efficiency

Energy & Environmental Science, Journal Year: 2024, Volume and Issue: 17(10), P. 3365 - 3374

Published: Jan. 1, 2024

A strong electron-deficient unit CNPz as a solid additive was developed in PTQ10/ m -BTP-PhC6 binary organic solar cells. high PCE of 19.67% achieved with significant increase the J SC and FF (81.8%).

Language: 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, Journal Year: 2024, Volume and Issue: 34(19)

Published: Jan. 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.

Language: Английский

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Designing a Novel Wide Bandgap Small Molecule Guest for Enhanced Stability and Morphology Mediation in Ternary Organic Solar Cells with over 19.3% Efficiency

Advanced Science, Journal Year: 2024, Volume and Issue: 11(23)

Published: April 3, 2024

Abstract In this study, a novel wide‐bandgap small molecule guest material, ITOA, designed and synthesized for fabricating efficient ternary organic solar cells (OSCs) ITOA complements the absorbance of PM6:Y6 binary system, exhibiting strong crystallinity modest miscibility. optimizes morphology by promoting intensive molecular packing, reducing domain size, establishing preferred vertical phase distribution. These features contribute to improved well‐balanced charge transport, suppressed carrier recombination, exciton dissociation. Consequently, significantly enhanced efficiency 18.62% device is achieved, accompanied increased short‐circuit current density ( J SC ), fill factor (FF), open‐circuit voltage V OC ). Building on success, replacing Y6 with BTP‐eC9 leads an outstanding PCE 19.33% OSCs. Notably, introduction expedites formation optimized morphology, resulting in impressive 18.04% without any postprocessing. Moreover, exhibits operational stability under maximum power point (MPP) tracking. This comprehensive study demonstrates that rationally can optimize reduce energy loss, streamline fabrication process, essential achieving high OSCs, paving way practical commercial applications.

Language: Английский

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Dual Function of the Third Component in Ternary Organic Solar Cells: Broaden the Spectrum and Optimize the Morphology

Small, Journal Year: 2024, Volume and Issue: 20(24)

Published: Jan. 29, 2024

Abstract Ternary organic solar cells (T‐OSCs) have attracted significant attention as high‐performance devices. In recent years, T‐OSCs achieved remarkable progress with power conversion efficiency (PCE) exceeding 19%. However, the introduction of third component complicates intermolecular interaction compared to binary blend, resulting in poor controllability active layer and limiting performance improvement. To address these issues, dual‐functional components been developed that not only broaden spectral range but also optimize morphology. this review, effect on expanding absorption is first discussed. Second, extra functions are introduced, including adjusting crystallinity molecular stack layer, regulating phase separation purity, altering orientation donor or acceptor. Finally, a summary current research provided, followed by discussion future directions.

Language: Английский

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The Development of Quinoxaline‐Based Electron Acceptors for High Performance Organic Solar Cells

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(33)

Published: June 19, 2024

In the recent advances of organic solar cells (OSCs), quinoxaline (Qx)-based nonfullerene acceptors (QxNFAs) have attracted lots attention and enabled recorded power conversion efficiency approaching 20%. As an excellent electron-withdrawing unit, Qx possesses advantages many modifiable sites, wide absorption range, low reorganization energy, so on. To develop promising QxNFAs to further enhance photovoltaic performance OSCs, it is necessary systematically summarize reported far. this review, all focused are classified into five categories as following: SM-Qx, YQx, fused-YQx, giant-YQx, polymer-Qx according molecular skeletons. The design concepts, relationships between structure optoelectronic properties, intrinsic mechanisms device discussed in detail. At end, kind materials summed up, direction prospected, challenges faced by given, constructive solutions existing problems advised. Overall, review presents unique viewpoints conquer challenge thus boost OSCs development toward commercial applications.

Language: Английский

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Selenophene‐fused Perylene Diimide‐Based Cathode Interlayer Enables 19 % Efficiency Binary Organic Solar Cells via Stimulative Charge Extraction

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(37)

Published: July 2, 2024

Abstract The cathode interlayer is crucial for the development of organic solar cells (OSCs), but research on simple and efficient materials lagging behind. Here, a donor‐acceptor (D–A) typed selenophene‐fused perylene diimide (PDI) derivative (SePDI3) developed as material (CIM) OSCs, non‐fused PDI (PDI3) used control CIM comparison. Compared to PDI3, SePDI3 shows stronger self‐doping effect better crystallinity, resulting in charge transport ability. Furthermore, interaction between L8‐BO can form an extraction channel, leading superior behavior. Finally, benefitting from significantly enhanced capacity, SePDI3‐based device displays champion PCE 19.04 % with ultrahigh fill factor 81.65 binary OSCs based PM6 : active layer, which one top efficiencies reported date novel CIMs. Our work prescribes facile effective fusion strategy develop high‐efficiency CIMs OSCs.

Language: Английский

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Regulating Crystallinity Mismatch Between Donor and Acceptor to Improve Exciton/Charge Transport in Efficient Organic Solar Cells

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(11)

Published: Jan. 15, 2024

Abstract Achieving a more balanced charge transport by morphological control is crucial in reducing bimolecular and trap‐assisted recombination enhancing the critical parameters for efficient organic solar cells (OSCs). Hence, facile strategy proposed to reduce crystallinity difference between donor acceptor incorporating novel multifunctional liquid crystal small molecule (LCSM) BDTPF4‐C6 into binary blend. first LCSM based on tetrafluorobenzene unit features low phase transition temperature strong self‐assembly ability, conducive regulating active layer morphology. When introduced as guest PM6 : Y6 binary, it exhibits better compatibility with primarily resides within because of similarity‐intermiscibility principle. Moreover, systematic studies revealed that could be used seeding agent enhance its crystallinity, thereby forming favourable suppressed recombination. Intriguingly, dual Förster resonance energy transfer was observed host acceptor, resulting an improved current density. This study demonstrates approach balance mobilities offers new insights boosting efficiency single‐junction OSCs beyond 20 %.

Language: Английский

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Three‐in‐One Strategy Enables Single‐Component Organic Solar Cells with Record Efficiency and High Stability

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

Published: Feb. 7, 2024

Abstract Single‐component organic solar cells (SCOSCs) with covalently bonding donor and acceptor are becoming increasingly attractive because of their superior stability over traditional multicomponent blend (OSCs). Nevertheless, the efficiency SCOSCs is far behind state‐of‐the‐art OSCs. Herein, by combination advantages three‐component single‐component devices, this work reports an innovative three‐in‐one strategy to boost performance SCOSCs. In strategy, three independent components (PM6, D18, PYIT) linked together create a new active layer based on ternary conjugated block copolymer (TCBC) PM6‐D18 ‐b‐ PYIT facile polymerization. Precisely manipulating component ratios in polymer chains able broaden light utilization, promote charge dynamics, optimize, stabilize film morphology, contributing simultaneously enhanced Ultimately, PYIT‐based device exhibits power conversion (PCE) 14.89%, which highest reported Thanks aggregation restriction each chain entanglement system, SCOSC displays significantly higher than corresponding two‐component (PM6‐D18:PYIT) (PM6:D18:PYIT). These results demonstrate that promising for developing stability.

Language: Английский

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Optimizing Molecular Crystallinity and Suppressing Electron‐Phonon Coupling in Completely Non‐Fused Ring Electron Acceptors for Organic Solar Cells

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(22)

Published: March 19, 2024

Abstract High open‐circuit voltage ( V oc ) organic solar cells (OSCs) have received increasing attention because of their promising application in tandem devices and indoor photovoltaics. However, the lack a precise correlation between molecular structure stacking behaviors wide band gap electron acceptors has greatly limited its development. Here, we adopted an asymmetric halogenation strategy (AHS) synthesized two completely non‐fused ring (NFREAs), HF‐BTA33 HCl‐BTA33. The results show that AHS significantly enhances dipoles suppresses electron‐phonon coupling, resulting enhanced intramolecular/intermolecular interactions decreased nonradiative decay. As result, PTQ10 : realizes power conversion efficiency (PCE) 11.42 % with 1.232 V, higher than symmetric analogue F‐BTA33 (PCE=10.02 %, =1.197 V). Notably, HCl‐BTA33 achieves highest PCE 12.54 1.201 due to long‐range ordered π–π packing surface electrostatic thereby facilitating exciton dissociation charge transport. This work not only proves NFREAs is simple effective for achieving both high , but also provides deeper insights design low cost NFREAs.

Language: Английский

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