Oligothiophene Additive‐Assisted Morphology Control and Recombination Suppression Enable High‐Performance Organic Solar Cells

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(11)

Published: Jan. 9, 2024

Abstract Tuning the morphology through processing additives represents one of most promising strategies to boost performance organic solar cells (OSCs). However, it remains unclear how oligothiophene‐based solid influence molecular packing and OSCs. Here, two namely 2T 4T, are introduced into state‐of‐the‐art PM6:Y6‐based OSCs understand they film formation process, nanoscale morphology, photovoltaic performance. It is found that additive can improve both donor polymer non‐fullerene acceptor, resulting in lower Urbach energy reduced loss. Furthermore, blend with treatment displays enhanced domain purity a more favorable distribution acceptor materials vertical direction, which enhance charge extraction efficiency while simultaneously suppressing recombination. Consequently, processed realize 18.1% for devices. general applicability demonstrated, an impressive 18.6% PM6:L8‐BO‐based achieved. These findings highlight uncomplicated oligothiophenes have excellent potential fine‐adjustment active layer crucial future development

Language: Английский

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Cost-Effective Cathode Interlayer Material for Scalable Organic Photovoltaic Cells

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(12), P. 8697 - 8705

Published: March 13, 2024

Organic photovoltaic (OPV) cells have demonstrated remarkable success on the laboratory scale. However, lack of cathode interlayer materials for large-scale production still limits their practical application. Here, we rationally designed and synthesized a interlayer, named NDI-Ph. Benefiting from well-modulated work function self-doping effect, NDI-Ph-based binary OPV achieve an excellent power conversion efficiency (PCE) 19.1%. NDI-Ph can be easily 100 g scale with low cost 1.96 $ g–1 using low-cost raw simple postprocessing method. In addition, insensitivity to film thickness enables it maintain high PCE at various coating speeds solution concentrations, demonstrating adaptability high-throughput cell manufacturing. As result, module 21.9 cm2 active area achieves PCEactive 15.8%, underscoring prospects in cells.

Language: Английский

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Optical and electrical losses in semitransparent organic photovoltaics

Joule, Journal Year: 2024, Volume and Issue: 8(2), P. 527 - 541

Published: Jan. 9, 2024

Language: Английский

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Approaching 20% Efficiency in Ortho‐Xylene Processed Organic Solar Cells by a Benzo[a]phenazine‐Core‐Based 3D Network Acceptor with Large Electronic Coupling and Long Exciton Diffusion Length

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(41)

Published: Aug. 13, 2024

Abstract High‐performance organic solar cells often rely on halogen‐containing solvents, which restrict the photovoltaic industry. Therefore, it is imperative to develop efficient materials compatible with halogen‐free solvents. Herein, a series of benzo[ ]phenazine (BP)‐core‐based small‐molecule acceptors (SMAs) achieved through an isomerization chlorination strategy presented, comprising unchlorinated NA1, 10‐chlorine substituted NA2, 8‐chlorine NA3, and 7‐chlorine NA4. Theoretical simulations highlight NA3's superior orbit overlap length tight molecular packing, attributed interactions between end group BP unit. Furthermore, NA3 demonstrates dense 3D network structures record electronic coupling 104.5 meV. These characteristics empower ortho‐xylene ( o ‐XY) processed PM6:NA3 device power conversion efficiency (PCE) 18.94%, surpassing PM6:NA1 (15.34%), PM6:NA2 (7.18%), PM6:NA4 (16.02%). Notably, significantly lower PCE in excessive self‐aggregation NA2 ‐XY. Importantly, incorporation D18‐Cl into binary blend enhances crystallographic ordering increases exciton diffusion donor phase, resulting ternary 19.75% (certified as 19.39%). findings underscore significance incorporating new electron‐deficient units design SMAs tailored for environmentally benign solvent processing OSCs.

Language: Английский

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Regulation of molecular orientation in organic solar cells

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 488, P. 150783 - 150783

Published: March 28, 2024

Language: Английский

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