Self‐Induced Bi‐interfacial Modification via Fluoropyridinic Acid For High‐Performance Inverted Perovskite Solar Cells

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

Published: Oct. 31, 2024

Abstract The uncontrolled crystallization of perovskite generates a significant number internal and interfacial defects, posing major challenge to the performance solar cells (PSCs). In this paper, novel bi‐interfacial modification strategy utilizing 5‐fluoropyridinic acid (FPA) is proposed modulate crystal growth provide defect passivation. It demonstrated that FPA self‐deposited at both top bottom interfaces films during thermal annealing. CO N functional groups in serve as chelating agents, binding closely uncoordinated Pb 2+ /Pb clusters, thereby passivating defects reducing charge recombination interfaces. strong chemical interactions between further stabilize Pb‐I framework, promoting formation high‐quality films, confirmed by situ photoluminescence measurements. Consequently, modified inverted PSCs achieved an exceptional power conversion efficiency (PCE) 25.37%. Moreover, devices retained over 93.17% initial after 3000 h continuous illumination under one‐sun equivalent conditions nitrogen atmosphere. This paper presents promising pathway for enhancing stability through self‐induced approach.

Language: Английский

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Simultaneous enhancement of efficiency, stability and stretchability in binary polymer solar cells with a three-dimensional aromatic-core tethered tetrameric acceptor

National Science Review, Journal Year: 2025, Volume and Issue: 12(3)

Published: Jan. 21, 2025

Polymer solar cells (PSCs) leverage blend films from polymer donors and small-molecule acceptors (SMAs), offering promising opportunities for flexible power sources. However, the inherent rigidity crystalline nature of SMAs often embrittle donor in constructed bulk heterojunction structure. To address this challenge, we improved stretchability by designing synthesizing a tethered giant tetrameric acceptor (GTA) with increased molecular weight that promotes entanglement individual SMA units. The key to design is using tetraphenylmethane as linking core create three-dimensional high C2 symmetry structure, which successfully regulates their aggregation relaxation behavior. With GTA acceptor, its PM6 exhibit significantly stretchability, nearly 150% increase crack onset strain value compared PM6:Y6. Moreover, PSCs achieve an efficiency up 18.71% demonstrate outstanding photostability, maintaining >90% initial conversion after operating over 1000 hours. Our findings specifically aligning weights more closely those counterparts, can enhanced without compromising morphological stability or device efficiency.

Language: Английский

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Efficient silver nanowires/cellulose electrothermal material with enhanced stability for printable chameleon-inspired camouflage device

Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: 688, P. 386 - 395

Published: Feb. 22, 2025

Language: Английский

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Constraining the Excessive Aggregation of Non-Fullerene Acceptor Molecules Enables Organic Solar Modules with the Efficiency >16%

ACS Nano, Journal Year: 2024, Volume and Issue: 18(41), P. 28026 - 28037

Published: Oct. 1, 2024

Translating high-performance organic solar cell (OSC) materials from spin-coating to scalable processing is imperative for advancing photovoltaics. For bridging the gap between laboratory research and industrialization, it essential understand structural formation dynamics within photoactive layer during printing processes. In this study, two typical printing-compatible solvents in doctor-blading process are employed explore intricate mechanisms governing thin-film state-of-the-art photovoltaic system PM6:L8-BO. Our findings highlight synergistic influence of both donor polymer PM6 solvent with a high boiling point on L8-BO layer, significantly influencing its morphological properties. The optimized strategy effectively suppresses excessive aggregation slow drying doctor-blading, enhancing crystallization preferential molecular orientation. These improvements facilitate more efficient charge transport, suppress defects recombination, finally enhance upscaling potential. Consequently, PM6:L8-BO OSCs demonstrate power conversion efficiencies 18.42% small-area devices (0.064 cm

Language: Английский

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A comprehensive review of PM6:BTP-eC9 based non-fullerene organic solar cells

Sustainable materials and technologies, Journal Year: 2024, Volume and Issue: 42, P. e01173 - e01173

Published: Nov. 12, 2024

Language: Английский

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Improving Efficiency of Organic Photovoltaics by Manipulating Critical Concentration of Polymer in Bulk‐Heterojunction Solution

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(49)

Published: Aug. 16, 2024

Abstract In the advancement of organic photovoltaics (OPV) toward scale‐up production, how to mitigate batch instability electron‐donating polymers originated from varied molecular weights remains a great challenge. By taking into consideration relationship between weight and relevant critical concentration ( c * ) solution, herein it is demonstrated that aggregation behavior can be tailored through manipulating polymer solution. It interesting note excessive in low‐molecular‐weight fractions circumvented while favorable mixing ratio identified. preparing binary bulk heterojunction film under ‐defined conditions for mixed‐molecular‐weight polymers, notable power conversion efficiency 19.1% devices achieved. Of particular importance linear interrelation established maximum PCE fraction aggregation, validating those straightforward spectra measurements accurately rationally guide photovoltaic donor thereby fully harnessing potent driving force affinity inherent fractions. These findings offer logical framework addressing variability large‐scale production high‐performance OPV devices.

Language: Английский

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