Polymer-like tetramer acceptor enables stable and 19.75% efficiency binary organic solar cells

Nature Communications, Journal Year: 2025, Volume and Issue: 16(1)

Published: Feb. 20, 2025

Abstract Limited by large batch differences and inferior polymerization degree of current polymer acceptors, the potential high efficiency stability advantages all-polymer solar cells (all-PSCs) cannot be fully utilized. Alternatively, largely π-extended structurally definite oligomer acceptors are effective strategies to realize overall performance acceptors. Herein, we report a linear tetramer acceptor namely 4Y-BO with identical molecular skeleton comparable molecular-weight relative control PY-BO. The shows refined film-forming kinetics improved ordering, offering uniform crystallinity donor hence well-defined fibrous heterojunction textures. Encouragingly, PM6:4Y-BO devices achieve an up 19.75% (certified efficiency:19.58%), surpassing that PM6:PY-BO device (15.66%) ranks highest among based on More noticeably, thermal stability, photostability mechanical flexibility collectively enhanced for devices. Our study provides important approach fabricating stable organic photovoltaics.

Language: Английский

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Diphosphonic acid-modified PEDOT:PSS for enhanced stability and efficiency in organic solar cells: Achieving 19.5% PCE through PSS erosion mitigation and interface Optimization

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 161453 - 161453

Published: March 1, 2025

Language: Английский

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200 nm Ultrathin Freestanding Organic Photovoltaics

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

Published: March 31, 2025

Ultrathin organic photovoltaics (OPVs) have great application prospects in the field of wearable electronics, such as electronic tattoos, skins, etc. In this study, we report substrate-free ultrathin OPVs with a thickness approximately 200 nm. The freestanding OPV devices achieve power conversion efficiency 11.6% and power-per-weight ratio 109.4 W g–1, weight 1.06 g m–2. can self-adhere to various surfaces complex curved structures, ensuring excellent conformity. Notably, demonstrate remarkable mechanical flexibility, maintaining 90% their initial after 1000 compression-stretching cycles are capable bending radius less than 2 μm. These attributes make crucial advancement expanding landscape for electronics other special applications ultraflexible ultralight requests.

Language: Английский

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Rational Regulation of Layer‐by‐Layer Processed Active Layer via Trimer‐Induced Pre‐Swelling Strategy for Efficient and Robust Thick‐Film Organic Solar Cells

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

Published: May 8, 2025

Abstract Thick‐film (>300 nm) organic solar cells (OSCs) have garnered intensifying attention due to their compatibility with commercial roll‐to‐roll printing technology for the large‐scale continuous fabrication process. However, uncontrollable donor/acceptor (D/A) arrangement in thick‐film condition, restricted exciton splitting and severe carrier traps significantly impede photovoltaic performance operability. Herein, combined layer‐by‐layer deposition technology, a twisted 3D star‐shaped trimer (BTT‐Out) is synthesized develop trimer‐induced pre‐swelling (TIP) strategy, where BTT‐Out incorporated into buried D18 donor layer enable of OSCs. The integrated approach characterizations reveal that exceptional configuration spontaneous self‐organization behavior could pre‐swell network facilitate acceptor's infiltration accelerate formation D/A interfaces. This enhancement triggers elevated polarons amplified hole‐transfer kinetics, which essential augmented efficiency. Furthermore, regulated swelling process can initiate favorable self‐assembly L8‐BO acceptors, would ameliorate transport channels mitigate traps. As result, TIP‐modified thin‐film OSC devices achieve champion 20.3% (thin‐film) 18.8% (thick‐film) upgraded stability, among one highest performances reported

Language: Английский

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Implementing High‐Throughput Screening of Organic Solar Cells using Transfer Learning Based on Fine‐Tuning Neural Network Strategy

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

Published: May 19, 2025

Abstract In organic solar cells (OSCs), traditional ensemble learning models have advanced the development of photovoltaic materials, reducing reliance on labor‐intensive trial‐and‐error methods. However, these suffer from insufficient generalization and poor transferability, leading to low accuracy in predicting power conversion efficiency (PCE) for new materials. this work, a transferable neural network‐based framework is established predict PCEs binary OSCs. Specifically, 1431 sets donor (excluding PM6):acceptor data are collected train validate four network model. These achieved Pearson correlation coefficients ( r ) ranging 0.75 0.84. Subsequently, dataset containing 113 PM6:acceptor pairs used test their abilities. The exhibited significantly decreased 0.55–0.60, whereas model maintained above 0.80. Additionally, two electron acceptors differing only alkyl chain branching points synthesized. predicted similar both acceptors. Conversely, different PCEs, consistent with experimental results. This work demonstrates that developed predictive offers substantial advantages accurately

Language: Английский

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Development of an efficient thiophene additive achieving 19.13 % power conversion efficiency in organic solar cells through enhanced intermolecular interaction strategies

Journal of Power Sources, Journal Year: 2025, Volume and Issue: 651, P. 237535 - 237535

Published: June 5, 2025

Language: Английский

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