Isomerization Engineering of Solid Additives Enables Highly Efficient Organic Solar Cells via Manipulating Molecular Stacking and Aggregation of Active Layer

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(33)

Published: June 20, 2024

Morphology control is crucial in achieving high-performance organic solar cells (OSCs) and remains a major challenge the field of OSC. Solid additive an effective strategy to fine-tune morphology, however, mechanism underlying isomeric solid additives on blend morphology OSC performance still vague urgently requires further investigation. Herein, two based pyridazine or pyrimidine as core units, M1 M2, are designed synthesized explore working OSCs. The smaller steric hindrance larger dipole moment facilitate better π-π stacking aggregation M1-based active layer. M1-treated all-small-molecule OSCs (ASM OSCs) obtain impressive efficiency 17.57%, ranking among highest values for binary ASM OSCs, with 16.70% M2-treated counterparts. Moreover, it imperative investigate whether isomerization engineering works state-of-the-art polymer D18-Cl:PM6:L8-BO-based devices achieve exceptional 19.70% (certified 19.34%), work provides deep insights into design clarifies potential optimizing device through additives.

Language: Английский

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Crossbreeding Effect of Chalcogenation and Iodination on Benzene Additives Enables Optimized Morphology and 19.68% Efficiency of Organic Solar Cells

Advanced Science, Journal Year: 2024, Volume and Issue: 11(23)

Published: March 25, 2024

Abstract Volatile solid additives have attracted increasing attention in optimizing the morphology and improving performance of currently dominated non‐fullerene acceptor‐based organic solar cells (OSCs). However, underlying principles governing rational design volatile remain elusive. Herein, a series efficient are successfully developed by crossbreeding effect chalcogenation iodination for photovoltaic performances OSCs. Five benzene derivatives 1,4‐dimethoxybenzene (DOB), 1‐iodo‐4‐methoxybenzene (OIB), 1‐iodo‐4‐methylthiobenzene (SIB), 1,4‐dimethylthiobenzene (DSB) 1,4‐diiodobenzene (DIB) systematically studied, where widely used DIB is as reference. The on overall property comprehensively investigated, which indicates that versatile functional groups provided various types noncovalent interactions with host materials modulating morphology. Among them, SIB combination sulphuration enabled more appropriate blend, giving rise to highly ordered molecular packing favorable As result, binary OSCs based PM6:L8‐BO PBTz‐F:L8‐BO well ternary PBTz‐F:PM6:L8‐BO achieved impressive high PCEs 18.87%, 18.81% 19.68%, respectively, among highest values

Language: Английский

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A systematic investigation on pyridine derived solid additives inducing fibrillar morphology for highly efficient organic solar cells with over 20 % efficiency

Materials Science and Engineering R Reports, Journal Year: 2025, Volume and Issue: 164, P. 100977 - 100977

Published: March 18, 2025

Language: Английский

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Methylated naphthalene additives with various melting and boiling points enable a win–win scenario of optimizing both cost and efficiency of polymer solar cells

Journal of Materials Chemistry A, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Readily available 2-methylnaphthalene (2-MN) was demonstrated as a volatile solid additive to achieve good win–win situation of optimizing among efficiency, cost and environmental issues.

Language: Английский

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Indacenodithiophene‐Based Medium‐Bandgap Guest Acceptor Enables High‐Efficiency Ternary Organic Solar Cells

Macromolecular Rapid Communications, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 14, 2025

The ternary organic solar cells (OSCs) have been proven to be an effective strategy for achieving high power conversion efficiency (PCE), exhibiting substantial potential continuous enhancement of device performance. In this work, a novel nonfullerene acceptor, IDT-FN, is developed utilizing renowned indacenodithiophene (IDT) core and moderately intense electron-withdrawing terminal groups, serving as the third component in OSCs. IDT-FN demonstrates excellent complementary light absorption cascaded energy levels with host materials D18 CH-6F, resulting enhanced photon harvesting charge transport within blend. Therefore, even as-cast manages surpass optimal binary device, superior PCE 17.34% compared latter's 17.08%. Through optimization, devices attain impressive 18.32%, accompanied by open-circuit voltage (Voc) 0.897 V, fill factor 0.745, short-circuit current density (Jsc) 27.41 mA cm-2. This significant success IDT-based medium-bandgap guests achieve state-of-the-art

Language: Английский

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Balanced Crystallization Enhances Morphology and Efficiency in Binary Organic Solar Cells

Small, Journal Year: 2025, Volume and Issue: unknown

Published: April 21, 2025

Abstract Achieving high‐performance organic solar cells (OSCs) relies heavily on precise morphology optimization, a challenging task due to the intrinsic differences in crystallization kinetics and interfacial compatibility between polymer donors small‐molecule acceptors. In this work, 2,7‐dibromonaphthalene (DBN) is introduced as an innovative solid additive that uniquely regulates both donor acceptor phases within PM6:Y6 system. Unlike conventional liquid additives, which often induce excessive Y6 crystallization, DBN achieves balanced enhancing molecular order PM6 while mitigating over‐aggregation Y6. This dual‐phase effect improves light absorption, exciton generation dissociation, charge transport, reduces recombination losses. As result, OSCs treated with achieved remarkable power conversion efficiency (PCE) of 18.5%, open‐circuit voltage ( V OC ) 0.848 V, high short‐circuit current density J SC 28.15 mA cm −2 , enhanced fill factor (FF) 77.7%. Adding anti‐reflection MgF 2 layer further boosts 19.0%, setting new benchmark for binary devices. study establishes promising regulator presents robust strategy control, advancing development photovoltaic applications.

Language: Английский

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Asymmetric π‐Bridge Strategy Regulating Film‐Forming Kinetics for Over 19% Efficiency Organic Solar Cells

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

Published: Aug. 16, 2024

Abstract Blending morphologies are critical to bulk‐heterojunction (BHJ) organic solar cells (OSCs) realize satisfactory photovoltaic performance. Therefore, rationally manipulating film‐forming kinetics is of great importance building suitable phase‐separations balance exciton dissociation and charge transport. Herein, by employing a unilateral π ‐bridge approach, new acceptor, WA6 reported optimize the process active layers their microstructures. Meanwhile, possible influencing factors proposed, including intermolecular electrostatic interactions donor/acceptor compatibility in vital solution‐to‐film transformation stage. Beneficial from appropriate fibrous phase‐separation, PM6:WA6 based refined exciton/charge properties, leading 15.39% high efficiency much greater than control device on counterpart acceptor without ‐bridge. Furthermore, can serve as efficient guest component well, achieved 19.21% resultant ternary cells. This study provides feasible approach modulate molecular aggregation procedure, for construction high‐performance OSCs with eligible blending morphologies.

Language: Английский

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Chalcogen Atoms Regulate the Organic Solar Cell Performance of B–N-Based Polymer Donors

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(17), P. 22265 - 22273

Published: April 18, 2024

Donor polymers play a key role in the development of organic solar cells (OSCs). B–N-based polymer donors, as new types materials, have attracted lot attention due to their special characteristics, such high E(T1), small ΔEST, and easy synthesis, they can be processed with real green solvents. However, relationship between chemical structure device performance has not been systematically studied. Herein, chalcogen atoms that regulate OSCs donors were Fortunately, substitution halogen atom did affect E(T1) ΔEST character polymer. The absorption energy levels regulated by O, S, Se substitution. PBNT-TAZ:Y6-BO-based demonstrated power conversion efficiency 15.36%. Moreover, layer-by-layer method was applied further optimize performance, PBNT-TAZ/Y6-BO-based yielded PCE 16.34%. Consequently, we how modulated electronic properties polymers. Detailed systematic structure–performance relationships are important for next-generation materials.

Language: Английский

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A Low‐Cost 3D Spirobifluorene‐Based Acceptor for High‐Performance Ternary Organic Solar Cells

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

Published: Oct. 2, 2024

Abstract The advantages of 3D materials as guest components ternary organic solar cells (TOSCs) are being realized, showing great potential in improving device performance. However, the correlation between their distinctive structure and performance remains largely unexplored. Herein, a acceptor named SF‐HR is cost‐effectively synthesized utilizing twisted spirofluorene core. shows an edge‐on oriented packing but not disordered aggregation other molecules. When introduced into D18:Y6 binary system, can induce more predominant face‐on finer domain size blend, which facilitates exciton dissociation multi‐direction charge transport. Besides, exhibits complementary absorption cascaded energy levels with D18 Y6, contributing to improvement short‐circuit current density ( J sc ) open‐circuit voltage V oc ), respectively. Accordingly, optimized achieves higher 0.893 V, 27.13 mA cm −2 , fill factor (FF) 77.8%, respectively, than that host device, yielding excellent efficiency 18.85%. This success demonstrates utilization crystalline material component represents promising strategy for achieving state‐of‐the‐art OSCs, conducive understanding relationship from new perspective.

Language: Английский

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Efficient Ternary Organic Solar Cells with Suppressed Nonradiative Recombination via B‒N based Polymer Donor

iScience, Journal Year: 2024, Volume and Issue: 28(1), P. 111682 - 111682

Published: Dec. 24, 2024

Organic solar cells (OSCs) have developed rapidly in recent years. However, the energy loss (E loss) remains a major obstacle to further improving photovoltaic performance. To address this issue, ternary strategy has been employed precisely tune E and boost efficiency of OSCs. The B‒N-based polymer donor proved process high E(T1) small ΔE ST characters, which can inhibition CT state recombination. Herin, PBNT-BDD was incorporated into state-of-the-art PM6:L8-BO binary construct Together with optimal morphology, device affords an impressive power conversion 18.95% improved open-circuit voltage (V oc), short-circuit density (J sc), reduced comparison ones, is highest PCE for B‒N materials-based device. This work broadens selection guest materials toward realizing performance

Language: Английский

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