Diluted Ternary Heterojunctions to Suppress Charge Recombination for Organic Solar Cells with 21% Efficiency

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

Published: Feb. 17, 2025

Abstract As an exitonic photovoltaic device, organic solar cells (OSCs) consist of electron donating and accepting components in their photoactive layer, which the molecular interactions between donor acceptor can significantly affect nanoscale morphology as well performance OSCs. In this work, by diluting with having opposite electrostatic potentials to promote structural order via strengthened intermolecular interactions, study shows that polymeric diluent is more effective due its long‐ranged conjugated backbone compared small diluent. The ternary heterojunction made C5‐16:L8‐BO binary acceptors diluted D18 strongest order, benefiting from strong L8‐BO C5‐16. enhanced within layer prepared layer‐by‐layer deposition p‐type n‐type heterojunctions contributes light absorption, improved charge transport, inhibited recombination. result, OSC based on (PY‐IT diluted)/L8‐BO:C5‐16 (D18 diluted) dual fibrils obtains unprecedented power conversion efficiency 21.0% (certified value 20.25%), one highest certified PCE up date.

Language: Английский

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Recent Progress in Dimerized Small-Molecular Acceptors for Organic Solar Cells

Molecules, Journal Year: 2025, Volume and Issue: 30(7), P. 1630 - 1630

Published: April 6, 2025

Organic solar cells (OSCs) have witnessed significant advancements in recent years, largely propelled by innovations material design and device engineering. Among the emerging materials, dimerized small-molecule acceptors (DSMAs) garnered considerable attention due to their unique advantages. For instance, DSMAs can directly inherit excellent optoelectronic properties of corresponding monomers. Moreover, relatively larger molecular weight effectively suppress diffusion active layer, thereby enhancing stability OSCs. Compared polymer acceptors, a well-defined structure, which is free from batch-to-batch variability, greatly reproducibility devices. This review comprehensively summarizes progress for OSCs, with focus on two primary linkage configurations: conjugative non-conjugative connections. Additionally, impact various connection positions (including core-unit, end-group, side-chain sites) packing, properties, performance systematically reviewed. The highlights critical role addressing key challenges such as photodegradation morphological instability, while balancing power conversion efficiency long-term stability. By consolidating breakthroughs identifying future research directions, this work aims provide valuable insights into rational DSMAs, paving way development high-performance commercially viable

Language: Английский

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Organic solar cells: beyond 20%

Science China Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 30, 2025

Language: Английский

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Synthesis of Ether-Bonded Perylene Diimide Oligomers without Noble-Metal Catalysts for Organic Solar Cells

Dyes and Pigments, Journal Year: 2025, Volume and Issue: unknown, P. 112892 - 112892

Published: May 1, 2025

Language: Английский

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Progress in organic solar cells: Materials, challenges, and novel strategies for niche applications

APL Energy, Journal Year: 2025, Volume and Issue: 3(2)

Published: May 13, 2025

Organic solar cells (OSCs) are emerging as a viable alternative, and complementary niche of applications, to the conventional silicon-based photovoltaics due their unique attributes, including flexibility, lightweight, semitransparency, ease processing. Recent breakthroughs in non-fullerene acceptors advanced polymer donors have led power conversion efficiencies exceeding 20%, closing gap with traditional technologies. These advancements driven by innovations material design engineering, enhanced understanding device morphology, improvements fabrication architectures, well state-of-the-art characterization techniques. Despite these achievements, significant challenges remain, such improving long-term stability under environmental stress, upscaling OSCs from lab-scale devices large-area modules through printing technologies, achieving cost-effective scalability for mass production. This review also highlights OSCs’ transformative potential applications semi-transparent photovoltaic windows, flexible/wearable electronics, agricultural systems, paving way alternative sustainable multifunctional energy solutions.

Language: Английский

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Non‐Halogenated Solvent Processed Ternary All‐Polymer Solar Cell with PCE of 18.55% Enabled by Two Compatible Polymer Acceptors^†

Chinese Journal of Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: May 29, 2025

Comprehensive Summary Herein, a theory‐guided ternary construction case on boosting power conversion efficiency (PCE) for all‐polymer solar cell (all‐PSC) is reported, where guest acceptor's characteristics include high miscibility with host polymer acceptor, significantly larger optical bandgap, and improved luminescence. Consequently, only 10 wt% PFFO‐Th (third component) addition, the PCE of binary control promoted to 18.55% from 16.69%, 11.1% relative increase, demonstrating great effectiveness this strategy. Besides, realized at state‐of‐the‐art level all‐PSCs processed by ortho ‐xylene, widely acknowledged green non‐ halogenated solvent field. This study shares new thought designing high‐performance photovoltaic devices reduced energy losses favorable charge dynamics, which would nourish future development all‐PSCs, even other organic electronics.

Language: Английский

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