Molecular interaction induced dual fibrils towards organic solar cells with certified efficiency over 20%

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Aug. 10, 2024

The nanoscale fibrillar morphology, featuring long-range structural order, provides abundant interfaces for efficient exciton dissociation and high-quality pathways effective charge transport, is a promising morphology high performance organic solar cells. Here, we synthesize thiophene terminated non-fullerene acceptor, L8-ThCl, to induce the fibrillization of both polymer donor host that surpasses 20% efficiency milestone After adding original weak less continuous nanofibrils donors, i.e. PM6 or D18, are well enlarged refined, whilst acceptor L8-BO also assembles into with enhanced order. By adapting layer-by-layer deposition method, order can be retained significantly boost power conversion efficiency, specific values 19.4% 20.1% PM6:L8-ThCl/L8-BO:L8-ThCl D18:L8-ThCl/L8-BO:L8-ThCl devices, latter being certified 20.0%, which highest reported so far single-junction

Language: Английский

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Over 19.2% efficiency of layer-by-layer organic photovoltaics enabled by a highly crystalline material as an energy donor and nucleating agent

Energy & Environmental Science, Journal Year: 2024, Volume and Issue: 17(14), P. 5173 - 5182

Published: Jan. 1, 2024

By introducing highly crystalline material D18A into donor layer acting as energy and nucleating agent, an optimal PCE of 19.25% was achieved for PM1 : D18A/L8-BO based OPVs.

Language: Английский

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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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Modulation of charge migration and ink flow dynamics exceeding 19% efficiency for blade-coating pseudo-planar heterojunction organic solar cells

Energy & Environmental Science, Journal Year: 2024, Volume and Issue: 17(18), P. 6799 - 6810

Published: Jan. 1, 2024

This work presents a novel charge migration strategy to efficiently engineer active layer morphology for PPHJ OSCs by firstly integrating SBC with NIL technique, which can improve transport/collection and phase separation behavior.

Language: Английский

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High‐Performance Photoactive Polymers: Innovations in Ternary Polymerization for Solar Applications

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

Published: Feb. 2, 2025

Abstract In recent years, polymer solar cells (PSCs) have achieved rapid progress, with power conversion efficiencies (PCEs) reaching up to 20.25%, driven by significant advancements in device fabrication and active‐layer materials. The ternary polymerization strategy has proven be a straightforward effective approach for developing high‐performance photoelectric polymers incorporating third monomer into the backbone. This incorporation effectively optimizes intrinsic properties, including UV–vis absorption, energy levels, solubility, crystallinity, morphology, charge transfer, mechanical robustness, batch‐to‐batch reproducibility, stability. review highlights latest designing photoactive copolymers (both donors acceptors), particular focus on stability, potential applications commercial development. aim is provide valuable guidance development of materials using strategy.

Language: Английский

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Layered All‐Polymer Solar Cells with Efficiency of 18.34% by Employing Alloyed Polymer Donors

Small, Journal Year: 2025, Volume and Issue: 21(11)

Published: Feb. 7, 2025

Abstract A series of layered all‐polymer solar cells (LA‐PSCs) with the normal or inverted structure are prepared by employing a sequential spin‐coating method PBQx‐TCl, PM1 as polymer donor, and PY‐DT acceptor. The power conversion efficiency (PCE) LA‐PSCs can be improved from 17.20% to 18.34% incorporating 30 wt.% into PBQx‐TCl layer, resulting simultaneously increased J SC 25.35 mA cm −2 , V OC 0.971 FF 74.49%. PCE improvement also achieved PBQx‐TCl:PM1 donor layers. mixed prefer form alloyed states in LA‐PSCs, which confirmed gradually s more content Meanwhile, photogenerated excitons layers dissociated at interface between PM1, especially for located near ITO electrode. exciton dissociation provide an additional channel improving utilization efficiency, positive external quantum spectral difference (∆EQE) values Over 6.6% realized using layer.

Language: Английский

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Thickness Insensitive Organic Solar Cells with High Figure‐of‐Merit‐X Enabled by Simultaneous D/A Interpenetration and Stratification

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(35)

Published: June 14, 2024

Abstract Low cost and printing friendly fabrication of organic solar cells (OSCs) require thick‐film devices with simply structured photoactive molecules. Thus, achieving high power conversion efficiency (PCE) for non‐fused ring acceptor‐based thickness is great significance. Herein, by transforming traditional blend casting method to emerging sequential deposition (SD) method, D18:A4T‐16 active exhibits large improvement from 8.02% 14.75% in 300 nm thick devices. Systematic morphological photophysical characterizations showcase the effectiveness SD processing sufficient donor/acceptor interpenetration vertical stratification, which eliminates dilemma charge generation/transport films. Meanwhile, D18 bottom layer proven helpful realizing fast evaporation postdeposited poor solvent, resulting naturally thickened well‐regulated crystallization. Furthermore, a new index emphasize based on nonfused acceptors, called figure‐of‐merit‐X (FoM‐X), has been defined. The processed herein, nm, 500 800 thicknesses possess leading FoM‐X values.

Language: Английский

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Layer‐by‐Layer All‐Polymer Solar Cells Approaching 19% with Dual‐Donor Modulation of an Interpenetrating Network

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

Published: Sept. 13, 2024

Abstract All‐polymer systems are promising for commercial applications because the lower diffusivity of polymers helps to inhibit large‐scaled phase separation and obtain excellent stability. Achieving a fine‐tuned morphology active layer with an appropriate vertical has long been major goal in obtaining efficient all‐polymer solar cells (all‐PSCs). Herein, through synergistic effect layer‐by‐layer (LBL) structure dual donor strategy, high performance stable all‐PSCs prepared by constructing interpenetrating network. The introduction third component PTzBI‐dF suppresses excessive aggregation reduces exciton recombination. formation favorable p‐i‐n adjust distribution improve Ultimately, fine optimization, PBQx‐T‐Cl:PTzBI‐dF/PY‐IT achieves PCE 18.83%. This research demonstrates simple effective way construct high‐performance OSCs desirable distribution.

Language: Английский

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Improving the Efficiency of Layer-by-Layer Organic Photovoltaics to Exceed 19% by Establishing Effective Donor–Acceptor Interfacial Molecular Interactions

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

Published: March 3, 2025

The power conversion efficiency of layer-by-layer organic solar cells (LOSCs) has reached an impressive level by utilizing sequential processing (SqP) for the individual deposition and regulation both donor acceptor materials. However, fundamental understanding phase separation in LOSCs remains contentious, hindering rational design due to ambiguous contribution stratification or beneficial vertical segregation morphology. Here, we systematically investigate utility solvent effects on drying kinetics understand how interaction between upper bottom layers affects formation donor/acceptor (D/A) interface its impact performance LOSCs. Particularly emphasizing substantial layer establishment effective D/A rather than significant LOSCs, this facilitates utilization blend casting SqP, introducing adequate interface, which contributes a superior 19.05%. Ultimately, provide three rules enhancing LOSCs: (1) appropriate selection solvents material ensure desired crystalline orientation, (2) strongly polar volatile capable dissolving form interfacial interaction, (3) sufficient interfaces.

Language: Английский

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High-performance organic solar cells enabled by the p-i-n structure and ternary strategy

Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: 12(37), P. 24862 - 24871

Published: Jan. 1, 2024

The layer-by-layer (LBL) strategy is an efficient way to improve the power conversion efficiency (PCE) of organic solar cells (OSCs) due their superiorities in vertical component distribution.

Language: Английский

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