20.6% Efficiency Organic Solar Cells Enabled by Incorporating a Lower Bandgap Guest Nonfullerene Acceptor Without Open‐Circuit Voltage Loss

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 28, 2025

Abstract Simultaneously mitigating both photovoltage and photocurrent losses is crucial for organic solar cells (OSCs) to approach the Shockley–Queisser limit of ideal efficiency. Incorporating a narrower bandgap nonfullerene acceptor (NFA) as guest component into host donor:NFA system broadens absorption spectrum. However, this can also increase nonradiative decay rate according energy‐gap law. In work, ternary OSCs are constructed by combining narrow AQx‐2F (as NFA) with lower eC9 NFA), significantly enhancing generation without compromising photovoltage. The addition acts crystallization inducer, extending period increasing ordered packing distance. This leads suppressed trap states, elevated dielectric constant, prolonged exciton lifetime, balanced hole/electron transport, reduced recombination loss. Consequently, optimized D18:AQx‐2F:eC9 achieve champion power conversion efficiency (PCE) 20.6% high open‐circuit voltage 0.937 V, short‐circuit current density 27.2 mA cm −2 fill factor 80.8%, validated an independently certified PCE 20.0%, establishing new benchmark bulk heterojunction OSCs. work demonstrates effective method simultaneously mitigate losses, paving way high‐performance

Язык: Английский

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Coordination Cathode Interlayer Enhancing the Stability of Air-Processed Organic Photovoltaics

ACS Applied Materials & Interfaces, Год журнала: 2025, Номер unknown

Опубликована: Март 26, 2025

Moisture in the air can harm photovoltaic performance of organic (OPV) devices due to serious charge recombination induced by moisture. The interface between electron transport layer (ETL) and top electrode is easily invaded moisture since it outermost interlayer device. Here, we report an effective strategy enhance resistance device modifying ETL ZnO nanoparticles (ZnO NPs) with a coordination interlayer. This dramatically strengthens adhesion NPs Ag electrode, thereby reducing invasion at enhancing device's stability air. After introducing interlayer, power conversion efficiency (PCE) unencapsulated increased substantially from 0.1% 16.3% when measured under open-air conditions. Notably, retained 85% 56% initial PCE after 14 days 1 year storage air, respectively.

Язык: Английский

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Suppression of Charge Recombination Induced by Solid Additive Assisting Organic Solar Cells with Efficiency over 20%

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Апрель 3, 2025

A volatile solid additive strategy, which can effectively optimize the morphology of photoactive layer with an ideal domain size and purity, has emerged as a promising approach to improve photovoltaic performance organic solar cells (OSCs). However, precise role additives in modulating charge exciton dynamics, especially recombination process, remains not fully understand. In this study, additive, 1,4-diiodo-2,5-dimethoxybenzene (DIDOB), is developed OSCs conduct comprehensive investigation into its effect on process. As result, PM6:L8-BO-X-based binary OSC processed DIDOB achieves excellent efficiency 19.75% remarkable fill factor 81.9%, owing optimal fiber network morphology, tighter ordered molecular packing, well suppression both bimolecular geminate recombination. Notably, exhibits broad universality other non-fullerene acceptor-based OSCs. Impressively, D18:PM6:L8-BO-based ternary device yielded 20.11% (certified 20.03%). This work highlights process within active provides insights for further development

Язык: Английский

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Efficient Perovskite/Organic Tandem Photovoltaic Devices and Large‐area Modules Featuring Thick‐Film Organic Solar Cells

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Апрель 10, 2025

Abstract Perovskite‐organic tandem solar cells (TSCs) possess significant potential due to their unique features, such as orthogonal processing solvents, tunable bandgap, and infinite molecular designs. However, device performance is often hindered by the limited series current density, which constrained absorption of rear organic cell (OSC). Here, a fine‐grained sub‐cell matching model has been developed that enables rapid screening material combinations based on practical parameters. The indicates increasing thickness OSC layer an effective approach boost efficiency, while also reducing manufacturing challenges for large‐scale production. To mitigate charge collection issues arising from excessive thickness, contact passivation technique self‐assembled monolayer developed, minimizes non‐radiative recombination reduces Schottky barrier at interface, enabling more balanced hole‐electron transport. As result, thick‐film (300 nm) achieved record‐high efficiency 18.08% (certified 17.80%), enhancing TSCs 24.31% 24.00%). Furthermore, large‐area photovoltaic module with exceeding 18.54% (18.48 cm 2 ) demonstrated. knowledge, this represents first demonstration perovskite‐organic TSCs.

Язык: Английский

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Blended solvent for tuning vertical phase separation in layer-by-layer processed thick-film organic solar cells

Science China Chemistry, Год журнала: 2024, Номер unknown

Опубликована: Дек. 25, 2024

Язык: Английский

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