Controlling the Third Component Distribution Toward High‐Efficient Ternary Organic Solar Cells

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

Published: March 4, 2025

Abstract Ternary organic solar cells (T‐OSCs) based on energy transfer can significantly boost the light absorption efficiency, thereby improving their power conversion efficiency (PCE). However, uncontrolled distribution of third component in bulk heterojunction (BHJ) device often results low ( E FRET ), and also tends to compromise interpenetrating network structure active layer. Herein, a localized deposition strategy is proposed establish with controlled (CDBHJ). Take PM6:Y6:IBC‐F for example, IBC‐F serves as donor PM6 acceptor. Compared BHJ‐based devices, proportion within phase increases from 25.1% 72.7%, enhancing 46.5% 66.8% CDBHJ‐based devices. Furthermore, improves crystallization separation kinetics during film‐forming process. Thus, exhibits superior exciton generation, diffusion, dissociation process, along higher more balanced charge transport. Consequently, achieves PCE 18.29%, which ranks among best PM6:Y6‐based T‐OSCs. This work demonstrates effectiveness controlling component, presenting an innovative pathway development highly efficient

Language: Английский

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

Science, Journal Year: 2025, Volume and Issue: 387(6732), P. 381 - 387

Published: Jan. 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.

Language: Английский

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Simultaneously Improving Stretchability and Efficiency of Flexible Organic Solar Cells by Incorporating a Copolymer Interlayer in Active Layer

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(46)

Published: June 26, 2024

Abstract Mechanical stretchability is a vital criterion for the wearable application of organic solar cells (OSCs), while excessive rigidity fused‐ring small molecular acceptors make photovoltaic film hard to meet stretchable requirements. Herein, an effective strategy developed construct intrinsically active layer by inserting copolymer PM6 ‐b‐ PYSe as interlayer between layer‐by‐layer processed D18 and BTP‐eC9. The shunts penetration BTP‐eC9 facilitates appropriate phase separation, favoring enhanced crack onset strain 17.69% compared D18/BTP‐eC9 (9.67%). Combining with optimal energy levels, prolonged carrier lifetime, suppressed bimolecular recombination aroused incorporation PM6‐ b ‐PYSe, D18/PM6‐ ‐PYSe/BTP‐eC9‐based OSC yields encouraging efficiency 17.97%. In particular, device demonstrates excellent mechanical property, which can retain over 80% after 4000 bending cycles. This work provides simultaneously enhance intrinsic performance flexible OSCs.

Language: Английский

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Dimerized small-molecule acceptors with electron withdrawing linker for efficient organic solar cells

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 160416 - 160416

Published: Feb. 1, 2025

Language: Английский

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Highly mechanically stable and intrinsically stretchable large-area organic photovoltaics using nanoporous bulk-heterojunction

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: unknown, P. 156116 - 156116

Published: Sept. 1, 2024

Language: Английский

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Device Performance of Emerging Photovoltaic Materials (Version 5)

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 26, 2024

Abstract This 5th annual “ Emerging PV Report” highlights the latest advancements in performance of emerging photovoltaic (e‐PV) devices across various e‐PV research areas, as documented peer‐reviewed articles published since August 2023. Updated graphs, tables, and analyses are provided, showcasing several key parameters, including power conversion efficiency, open‐circuit voltage, short‐circuit current, fill factor, light utilization stability test energy yield. These parameters presented functions bandgap average visible transmittance for each technology application contextualized using benchmarks such detailed balance efficiency limit.

Language: Английский

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Tetramerized Small‐Molecule Acceptor for Organic Solar Cells with Enhanced Efficiency, Stability, and Mechanical Robustness: Impact of Chain Length and Dispersity Effects

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 1, 2024

Abstract Discrete dimer or multimer acceptors have enhanced the stability of organic solar cells (OSCs) due to their slow diffusion kinetics resulting from large molecular sizes. However, development with chain length longer than trimers has been challenging, which often require multistep reactions low synthetic yield. In this study, a new discrete tetramer acceptor (TetA) using one‐pot reaction and subsequent purification processes is developed. During purification, (DA) trimer (TA) are also obtained. The OSCs for TetA demonstrate higher power conversion efficiency (PCE) 16.14% those shorter lengths, such as monomer (MA, 12.85%), DA (14.31%), TA (15.10%). Additionally, despite having similar number‐average weight, TetA‐based exhibit significantly PCE (16.14%) compared based on mixture (MixA) dispersity (10.72%). Furthermore, highest photostability mechanical robustness among series. For example, superior ( t 70% lifetime = 2180 h under 1‐sun illumination) (crack‐onset strain (COS) 8%) MA 220 h, COS 2%), MixA 745 6%).

Language: Английский

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Toward Flexible and Stretchable Organic Solar Cells: A Comprehensive Review of Transparent Conductive Electrodes, Photoactive Materials, and Device Performance

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 10, 2024

Abstract Flexible and stretchable organic solar cells (FOSCs SOSCs) hold immense potential due to their versatility applicability in emerging areas such as wearable electronics, foldable devices, biointegrated systems. Despite these promising applications, several challenges remain, primarily related the mechanical durability, material performance, scalability required for commercialization. This review comprehensively highlights recent advancements design fabrication of FOSCs SOSCs, with a particular emphasis on key functional layers, including transparent conductive electrodes, interfacial photoactive materials, top electrodes. Innovations design, active layers electrodes improved flexibility, are discussed alongside developments device processes achieve power conversion efficiencies exceeding 19%. Furthermore, addresses remaining challenges, need scalable manufacturing techniques enhanced robustness under strain. Finally, prospects SOSCs analyzed, providing insights into how technologies can contribute development sustainable, high‐performance sources electronic devices other flexible electronics. offers valuable insights, bringing commercialization wearable, closer reality.

Language: Английский

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High‐Performance Intrinsically‐Stretchable Organic Solar Cells Enabled by Electron Acceptors with Flexible Linkers

Angewandte Chemie International Edition, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 27, 2025

Abstract Intrinsically stretchable organic solar cells (IS‐OSCs) are emerging as promising candidates for powering next‐generation wearable electronics. However, developing molecular design strategies to achieve both high efficiency and mechanical robustness in IS‐OSCs remains a significant challenge. In this work, we present novel approach by synthesizing dimerized electron acceptor (DY‐FBrL) that enables rigid OSCs with power conversion (PCE) of 18.75 % crack‐onset strain (COS) 18.54 %. The enhanced PCE stretchability DY‐FBrL‐based devices attributed its extended π‐conjugated backbone elongated side chains. Furthermore, introduce an innovative polymerized (PDY‐FL), synthesized via the polymerization DY‐FBrL. While PDY‐FL‐based exhibit slightly lower 14.13 %, they significantly higher COS 23.45 representing one highest PCEs reported acceptors containing only flexible linkers. Consequently, fabricated using DY‐FBrL PDY‐FL notable 14.31 11.61 respectively. Additionally, device improves progressively from Y6 (strain at 80% =11 %), =23 =31 %). This study presents strategy tailoring structures, offering new pathway develop high‐performance properties.

Language: Английский

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Molecular Design of Dimeric Acceptor Enables Binary Organic Solar Cells with 19.78% Efficiency and Enhanced Stability

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

Published: March 3, 2025

Abstract The development of organic solar cells (OSCs) with high efficiency and stability is highly desirable to facilitate its commercial applications. Although dimeric acceptors distinctive advantages have been widely studied, high‐performance binary OSCs based on such molecules rarely achieved. In this work, a new acceptor (DY‐FL) constructed by simultaneously optimizing the linking sites units, as well building blocks. Thanks effective molecular design, DY‐FL provides improved stacking for fibrous morphology favorable exciton/charge dynamics. Consequently, DY‐FL‐based render superior power conversion (PCE) 19.78%, representing record‐breaking acceptors. Importantly, devices display significantly enhanced operational under external stimuli light heat, in comparison their small molecule (Y‐F)‐based counterpart. These findings highlight significance blocks modes, providing insight into design strategy state‐of‐the‐art OSCs.

Language: Английский

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