Dimerized small-molecule acceptors enable efficient and stable organic solar cells

Joule, Journal Year: 2023, Volume and Issue: 7(2), P. 416 - 430

Published: Feb. 1, 2023

Language: Английский

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Stability of organic solar cells: toward commercial applications

Chemical Society Reviews, Journal Year: 2024, Volume and Issue: 53(5), P. 2350 - 2387

Published: Jan. 1, 2024

Organic solar cells (OSCs) have attracted a great deal of attention in the field clean energy due to their advantages transparency, flexibility, low cost and light weight. Introducing them market enables seamless integration into buildings windows, while also supporting wearable, portable electronics internet-of-things (IoT) devices. With development photovoltaic materials optimization fabrication technology, power conversion efficiencies (PCEs) OSCs rapidly improved now exceed 20%. However, there is significant lack focus on material stability device lifetime, causing severe hindrance commercial applications. In this review, we carefully review important strategies employed improve over past three years from perspectives design engineering. Furthermore, analyze discuss current progress terms air, light, thermal mechanical stability. Finally, propose future research directions overcome challenges achieving highly stable OSCs. We expect that will contribute solving problem OSCs, eventually paving way for applications near future.

Language: Английский

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“N‐π‐N” Type Oligomeric Acceptor Achieves an OPV Efficiency of 18.19% with Low Energy Loss and Excellent Stability

Advanced Science, Journal Year: 2022, Volume and Issue: 9(23)

Published: June 16, 2022

A novel "N-π-N" type oligomeric acceptor of 2BTP-2F-T, constructed by two small non-fullerene (NFA) units linked with a thiophene π bridge is reported. The 2BTP-2F-T not only combines the advantages NFA and polymeric acceptors (PYF-T-o) similar but also exhibits superior characteristics high absorption coefficient electron moblity(µ

Language: Английский

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Design of Non-fused Ring Acceptors toward High-Performance, Stable, and Low-Cost Organic Photovoltaics

Accounts of Materials Research, Journal Year: 2022, Volume and Issue: 3(6), P. 644 - 657

Published: May 25, 2022

ConspectusToward future commercial applications of organic solar cells (OSCs), photovoltaic materials that enable high efficiency, excellent stability, and low cost should be developed. Fused-ring electron acceptors (FREAs) have declared OSCs are capable showing efficiencies over 19%, whereas stability not solved yet. As the counterparts FREAs, non-fused ring (NFREAs) more flexible in molecular design. They better because reduction intramolecular tension via breaking fused backbone advantages with synthetic complexity. However, challenge for NFREAs is relatively lower (around 15% at current stage), which require designs addressing issues conformational unicity effective packing.In this Account, we comprehensively summarize works about carried out our group from three main frameworks, including design efficiency optimization, material cost, stability. First, part existing rotatable single bond will bring problem uncertainty, but it can through proper design, also regulates energy levels, light absorption range, packing mode molecule obtaining higher performance. Thus, part, discuss evolution aspects, skeleton terminal modification, side chain engineering. Many strategies used a skeleton, such as utilizing quinoid effect, introducing functional groups push–pulling using multiple lock. Furthermore, simplifying preferred development tendency. terminal, modification strategy adjusting conjugation length halogen atoms. What more, by to induce appropriate steric hindrance, fix orientation molecules, thus regulating modes. Second, regarding compare synthesis complexities between state-of-the-art FREAs NFREAs. Because processes reduce complex cyclization reactions, routes greatly simplified, obtained minimal steps. Third, analyze workable views intrinsic photostability, thermal Finally, conclude challenges conquered propose perspectives could performed NFREAs, hope pushing toward performance, cost.

Language: Английский

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Linker Engineering of Dimerized Small Molecule Acceptors for Highly Efficient and Stable Organic Solar Cells

ACS Energy Letters, Journal Year: 2023, Volume and Issue: 8(3), P. 1344 - 1353

Published: Feb. 8, 2023

High power conversion efficiency (PCE) and long-term stability are important requirements for commercialization of organic solar cells (OSCs). In this study, we demonstrate efficient (PCE = 18.60%) stable (t80% lifetime > 4000 h) OSCs by developing a series dimerized small-molecule acceptors (DSMAs). We prepared three different DSMAs (DYT, DYV, DYTVT) using linkers (i.e., thiophene, vinylene, thiophene– vinylene– thiophene), to connect their two Y-based building blocks. find that the crystalline properties glass transition temperature (Tg) can be systematically modulated linker selection. A DYV-based OSC achieves highest PCE (18.60%) among DSMA-based owing appropriate backbone rigidity leading an optimal blend morphology high electron mobility. Importantly, also demonstrates excellent operational under 1-sun illumination, i.e., t80% 4005 h.

Language: Английский

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Geometry design of tethered small-molecule acceptor enables highly stable and efficient polymer solar cells

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: May 22, 2023

With the power conversion efficiency of binary polymer solar cells dramatically improved, thermal stability small-molecule acceptors raised main concerns on device operating stability. Here, to address this issue, thiophene-dicarboxylate spacer tethered are designed, and their molecular geometries further regulated via thiophene-core isomerism engineering, affording dimeric TDY-α with a 2, 5-substitution TDY-β 3, 4-substitution core. It shows that processes higher glass transition temperature, better crystallinity relative its individual acceptor segment isomeric counterpart TDY-β, more stable morphology donor. As result, based delivers 18.1%, most important, achieves an extrapolated lifetime about 35000 hours retaining 80% initial efficiency. Our result suggests proper geometry design, can achieve both high

Language: Английский

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Tethered Small‐Molecule Acceptors Simultaneously Enhance the Efficiency and Stability of Polymer Solar Cells

Advanced Materials, Journal Year: 2022, Volume and Issue: 35(2)

Published: Nov. 17, 2022

Abstract For polymer solar cells (PSCs), the mixture of donors and small‐molecule acceptors (SMAs) is fine‐tuned to realize a favorable kinetically trapped morphology thus commercially viable device efficiency. However, thermodynamic relaxation mixed domains within blend raises concerns related long‐term operational stability devices, especially in record‐holding Y‐series SMAs. Here, new class dimeric Y6‐based SMAs tethered with differential flexible spacers reported regulate their aggregation behavior. In blends PM6, it found that they favor an improved structural order relative Y6 counterpart. Most importantly, show large glass transition temperatures suppress domains. high‐performing blend, unprecedented open circuit voltage 0.87 V realized conversion efficiency 17.85%, while those regular Y6‐base devices only reach 0.84 16.93%, respectively. dimer‐based possesses substantially reduced burn‐in loss, retaining more than 80% initial after operating at maximum power point under continuous illumination for 700 h. The tethering approach provides direction develop PSCs high excellent stability.

Language: Английский

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Dimer Acceptor Adopting a Flexible Linker for Efficient and Durable Organic Solar Cells

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(21)

Published: March 22, 2023

Abstract Organic solar cells (OSCs) have advanced rapidly due to the development of new photovoltaic materials. However, long‐term stability OSCs still poses a severe challenge for their commercial deployment. To address this issue, dimer acceptor ( d T9TBO) with flexible linker is developed incorporation into small‐molecule acceptors form molecular alloy enhanced intermolecular packing and suppressed diffusion stabilize active layer morphology. Consequently, PM6 : Y6 T9TBO‐based device displays an improved power conversion efficiency (PCE) 18.41 % excellent thermal negligible decay after being aged at 65 °C 1800 h. Moreover, OSC also exhibits mechanical durability, maintaining 95 its initial PCE bended repetitively 1500 cycles. This work provides simple effective way fine‐tune stabilized morphology overcome trade‐off between stability.

Language: Английский

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Oligomerized Fused‐Ring Electron Acceptors for Efficient and Stable Organic Solar Cells

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(46)

Published: July 12, 2023

Abstract Organic solar cells (OSCs) have attracted wide research attention in the past decades. Very recently, oligomerized fused‐ring electron acceptors (OFREAs) emerged as a promising alternative to small‐molecular/polymeric acceptor‐based OSCs due their unique advantages such well‐defined structures, batch reproducibility, good film formation, low diffusion coefficient, and excellent stability. So far, rapid advances been made development of OFREAs consisting directly/rigidly/flexibly linked oligomers fused ones. In this Minireview, we systematically summarized recent progress OFREAs, including structural diversity, synthesis approach, molecular conformation packing, long‐term Finally, conclude with future perspectives on challenges be addressed potential directions. We believe that Minireview will encourage novel for OSC applications.

Language: Английский

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Trimerized small-molecule acceptors enable high-performance organic solar cells with high open-circuit voltage and prolonged life-time

Energy & Environmental Science, Journal Year: 2023, Volume and Issue: 16(8), P. 3339 - 3349

Published: Jan. 1, 2023

We report a new trimer acceptor (TYT) composed of three Y-based molecules connected by electron-donating spacers. The TYT enables high-performance and stable organic solar cell (OSC) with t 80% lifetime >8000 h under 1 sun illumination.

Language: Английский

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