19.7% efficiency binary organic solar cells achieved by selective core fluorination of nonfullerene electron acceptors

Joule, Journal Year: 2024, Volume and Issue: 8(3), P. 835 - 851

Published: Jan. 30, 2024

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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Cost-Effective Cathode Interlayer Material for Scalable Organic Photovoltaic Cells

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(12), P. 8697 - 8705

Published: March 13, 2024

Organic photovoltaic (OPV) cells have demonstrated remarkable success on the laboratory scale. However, lack of cathode interlayer materials for large-scale production still limits their practical application. Here, we rationally designed and synthesized a interlayer, named NDI-Ph. Benefiting from well-modulated work function self-doping effect, NDI-Ph-based binary OPV achieve an excellent power conversion efficiency (PCE) 19.1%. NDI-Ph can be easily 100 g scale with low cost 1.96 $ g–1 using low-cost raw simple postprocessing method. In addition, insensitivity to film thickness enables it maintain high PCE at various coating speeds solution concentrations, demonstrating adaptability high-throughput cell manufacturing. As result, module 21.9 cm2 active area achieves PCEactive 15.8%, underscoring prospects in cells.

Language: Английский

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Recent Progress of Solution‐Processed Thickness‐Insensitive Cathode Interlayers for High‐Performance Organic Solar Cells

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 5, 2025

Abstract Organic solar cells (OSCs) have shown great applications potential in flexible/wearable electronics, indoor photovoltaics and so on. The efficiencies of single‐junction OSCs exceeded 19%, making the commercialization brighter. Large‐area printing fabrication is a key way to OSCs, solution‐processed thickness‐insensitive cathode interlayers (CILs) are urgently needed for large‐area fabrication. High electron mobility interfacial materials (CIMs) critical enable CILs. N‐type self‐doped characteristics can endow organic CIMs with high mobility. Different type n‐type show different applicability conventional inverted OSCs. External dopants further increase hybrid blends. Particularly, ZnO doped dyes achieve superior photoconductivity This review focuses on CILs high‐performance In small molecules polymers, external n‐doped blends as summarized. small‐molecular electrolytes polyelectrolytes, PEI‐/PEIE‐based (including organic‐organic ZnO‐organic) summarized relationships between particular functions chemical structures highlighted. Finally, summary outlook provided.

Language: Английский

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Asymmetric Π‐Bridge Engineering Enables High‐Permittivity Benzo[1,2‐B:4,5‐b′]Difuran‐Conjugated Polymer for Efficient Organic Solar Cells

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(9)

Published: Sept. 13, 2023

Abstract Organic solar cells (OSCs) exhibit complex charge dynamics, which are closely correlated with the dielectric constant (ɛ r ) of photovoltaic materials. In this work, a series novel conjugated copolymers based on benzo[1,2‐b:4,5‐b′]difuran (BDF) and benzotriazole (BTz) is designed synthesized, differ by nature π‐bridge from one another. The PBDF‐TF‐BTz asymmetric furan thiophene demonstrates larger ɛ 4.22 than PBDF‐dT‐BTz symmetric (3.15) PBDF‐dF‐BTz (3.90). also offers more favorable molecular packing appropriate miscibility non‐fullerene acceptor Y6 its counterparts. corresponding PBDF‐TF‐BTz:Y6 OSCs display efficient exciton dissociation, fast transport collection, reduced recombination, eventually leading to power conversion efficiency 17.01%. When introducing fullerene derivative (PCBO‐12) as third component, PBDF‐TF‐BTz:Y6:PCBO‐12 yield remarkable FF 80.11% high 18.10%, highest value among all reported BDF‐polymer‐based OSCs. This work provides an effective approach developing high‐permittivity materials, showcasing promising polymer donor for constructing high‐performance

Language: Английский

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Effect of 1‐Fluoro‐2‐iodobenzene Solvent Additive on the Crystallization of Donors and Acceptors, and Ultrafast Carrier Dynamics in Polymer Solar Cells

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 34(13)

Published: Dec. 15, 2023

Abstract Controlled sequential crystallization of donors and acceptors is a critical factor for achieving enhanced phase separation efficient charge transfer performance in polymer solar cells (PSCs). In this study, comprehensive investigation structurally simple solvent additive, 1‐fluoro‐2‐iodobenzene (OFIB) conducted, which efficiently controls the morphology active layer, resulting fibrous assembly significantly enhancing power conversion efficiency from 16.34% to 18.38% based on PM6:L8‐BO system. Density functional theory, molecular dynamics simulations, grazing incidence small‐ wide‐angle X‐ray scattering techniques reveal that addition OFIB processed blend aligns orientation acceptor molecules, thereby overall π–π stacking layer. establishes nearly equal‐strength interactions with conjugated frameworks both donor materials, benefiting multiple electron conjugation between its iodine atom framework Femtosecond‐timescale photophysical studies demonstrate OFIB‐optimized layer shows reduced exciton losses at donor–acceptor interface. This study offers new perspective mechanism underlying function additives presents research methodology will guide development next‐generation non‐fullerene PSCs.

Language: Английский

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Improving the Thermal Stability of Inverted Organic Solar Cells by Mitigating the Undesired MoO₃ Diffusion toward Cathodes with a High-Ionization Potential Interface Layer

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: March 1, 2025

Understanding the thermal degradation mechanism of organic solar cells (OSCs) and developing strategies to enhance their stability are crucial before they can be commercialized. In this paper, we demonstrated that in a structure-inverted ITO/ZnO/PM6/L8-BO/TCTA/MoO3/Ag cell, thin 4,4′,4″-tris(carbazol-9-yl)-triphenylamine (TCTA) film between MoO3 PM6:L8-BO significantly suppress fast short circuit current (JSC) loss slow but continuous open voltage (VOC) fill factor (FF) decay upon 150 °C annealing. XPS TOF–SIMS results confirm annealing leads formation (MoO3)− at MoO3/PM6/L8-BO interface diffusion through photoactive layer. The diffused act as acceptor-type impurities p-doping layer, increasing charge recombination within layer reducing JSC. addition, accumulation cathode consequently decreases VOC FF. thermally induced interfacial model is supported by detailed drift-diffusion simulations. TCTA-interlayer minimizes diffusion, thereby stabilizing cell performance against TCTA-incorporating showed high PCE over 16% after high-temperature hot-press encapsulation, resulting excellent under 85 °C.

Language: Английский

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2D MXene interface engineering for organic solar cells

Journal of Materials Chemistry C, Journal Year: 2023, Volume and Issue: 11(39), P. 13189 - 13203

Published: Jan. 1, 2023

Organic solar cells (OSCs) have several advantages over conventional inorganic cells, including lower cost and greater flexibility.

Language: Английский

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Advances of batch-variation control for photovoltaic polymers

Nano Energy, Journal Year: 2024, Volume and Issue: 123, P. 109397 - 109397

Published: Feb. 16, 2024

Language: Английский

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The revival of 4H-cyclopenta[2,1-b:3,4-b′]dithiophene (CPDT) driven by low-cost and high-performance nonfused-ring electron acceptors

Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: 12(29), P. 17973 - 17991

Published: Jan. 1, 2024

This review comprehensively summarizes the development history of CPDT-based organic photovoltaic materials, which contributes to a deeper understanding revival CPDT driven by low-cost acceptors.

Language: Английский

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