20.2% Efficiency Organic Photovoltaics Employing a π‐Extension Quinoxaline‐Based Acceptor with Ordered Arrangement

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

Published: June 20, 2024

Organic solar cells, as a cutting-edge sustainable renewable energy technology, possess myriad of potential applications, while the bottleneck problem less than 20% efficiency limits further development. Simultaneously achieving an ordered molecular arrangement, appropriate crystalline domain size, and reduced nonradiative recombination poses significant challenge is pivotal for overcoming limitations. This study employs dual strategy involving development novel acceptor ternary blending to address this challenge. A non-fullerene acceptor, SMA, characterized by highly arrangement high lowest unoccupied orbital level, synthesized. By incorporating SMA guest in PM6:BTP-eC9 system, it observed that staggered liquid-solid transition donor facilitating crystallization ordering maintaining suitable size. Furthermore, optimized vertical morphology bimolecular recombination. As result, device achieved champion 20.22%, accompanied increased voltage, short-circuit current density, fill factor. Notably, stabilized 18.42% attained flexible devices. underscores synergistic approach integrating material innovation techniques optimizing bulk heterojunction photovoltaic performance.

Language: Английский

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Halogenated Nonfused Ring Electron Acceptor for Organic Solar Cells with a Record Efficiency of over 17%

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(4)

Published: Nov. 23, 2023

Abstract Three nonfused ring electron acceptors (NFREAs), namely, 3TT‐C2‐F , 3TT‐C2‐Cl and 3TT‐C2 are purposefully designed synthesized with the concept of halogenation. The incorporation F or/and Cl atoms into molecular structure ( ) enhances π–π stacking, improves mobility, regulates nanofiber morphology blend films, thus facilitating exciton dissociation charge transport. In particular, films based on D18: demonstrate a high an extended diffusion distance, well‐formed network. These factors contribute to devices remarkable power conversion efficiency 17.19%, surpassing that (16.17%) (15.42%). To best knowledge, this represents highest achieved in NFREA‐based up now. results highlight potential halogenation NFREAs as promising approach enhance performance organic solar cells.

Language: Английский

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Optimizing Double‐Fibril Network Morphology via Solid Additive Strategy Enables Binary All‐Polymer Solar Cells with 19.50% Efficiency

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

Published: July 16, 2024

Double-fibril network morphology (DFNM), in which the donor and acceptor can self-assemble into a double-fibril structure, is beneficial for exciton dissociation charge transport organic solar cells. Herein, it demonstrated that such DFNM be constructed optimized all-polymer cells (all-PSCs) with assistance of 2-alkoxynaphthalene volatile solid additives. It revealed incorporation induce stepwise regulation aggregation molecules during film casting thermal annealing processes. Through altering alkoxy additives, both intermolecular interactions molecular miscibility host materials precisely tuned, allows optimization process facilitation self-assembly, thus leading to reinforced packing DFNM. As result, an unprecedented efficiency 19.50% (certified as 19.1%) obtained 2-ethoxynaphthalene-processed PM6:PY-DT-X all-PSCs excellent photostability (T

Language: Английский

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Rapid solidification for green-solvent-processed large-area organic solar modules with >16% efficiency

Energy & Environmental Science, Journal Year: 2024, Volume and Issue: 17(8), P. 2935 - 2944

Published: Jan. 1, 2024

A rapid solidification strategy was developed for simultaneously avoiding the Marangoni effect and suppressing molecular aggregation. The resultant 15.64 cm 2 large-area OSC module exhibited a record power conversion efficiency of 16.03%.

Language: Английский

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Achieving 19.78%‐Efficiency Organic Solar Cells by 2D/1A Ternary Blend Strategy with Reduced Non‐Radiative Energy Loss

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(44)

Published: June 2, 2024

Abstract Reducing non‐radiative energy loss (∆ E nr ) is critical for enhancing the photovoltaic performance of organic solar cells (OSCs). To achieve this, a small molecular donor, LJ1, introduced as third component in host system D: A (D18: BTP‐eC9‐4F). The cascade‐like level alignment D18, and BTP‐eC9‐4F facilitates efficient charge transfer. LJ1's good solubility processing solvent high miscibility with delay precipitation BTP‐eC9‐4F, leading to improved phase morphology blend films. Additionally, LJ1 increases spacing between polymer donor (PD) molecule acceptor (SMA), optimizing film reducing OSCs. Ternary OSCs based on D18:LJ1:BTP‐eC9‐4F power conversion efficiency (PCE) 19.43% reduced ∆ . Notably, ternary device using D18:LJ1:L8‐BO attains an outstanding PCE 19.78%, which one highest OSC. work highlights effectiveness strategy OSC while minimizing

Language: Английский

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Sustainable Solution Processing Toward High‐Efficiency Organic Solar Cells: A Comprehensive Review of Materials, Strategies, and Applications

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

Published: Oct. 25, 2024

Abstract Organic solar cells (OSCs) have emerged as promising candidates for renewable energy harvesting due to their lightweight, flexible, and low‐cost fabrication potential. The efficiency of OSCs is largely determined by the choice solvents, which significantly affect film morphology active layers, intermixed donor‐acceptor domains, overall device performance. Beginning with an introduction importance solvent selection, screening classification emphasizing characteristics based on sustainability, solubility, other additional considerations are explored. Various non‐halogenated highlighting commonly used aromatic biomass‐derived water/alcohol‐based solvents state‐of‐the‐art donor acceptor materials, focusing efficient materials such PM6 D18, high‐performing Y‐series acceptors also presented. Strategies developing high‐performance processed using examined, including engineering additive additive‐free approaches, ternary strategies, layer‐by‐layer techniques. large‐area devices addressed, blade‐coating, slot‐coating, processing Finally, this review outlines future research directions in OSCs, need continuous innovation overcome existing limitations propel OSC technology toward commercial viability.

Language: Английский

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Halogenation Engineering of Solid Additives Enables 19.39% Efficiency and Stable Binary Organic Solar Cells via Manipulating Molecular Stacking and Aggregation of Both Donor and Acceptor Components

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

Published: Oct. 3, 2024

Abstract By selectively interacting with acceptor components, various typed solid additives achieve boosted power conversion efficiency (PCE) in organic solar cells (OSCs). However, due to the efficient active layer being composed of donor and materials, it is difficult obtain desired morphology by manipulating component alone, limiting further improvement PCEs. Herein, two a same backbone thiophene‐benzene‐thiophene (halogen‐free D1‐H) but different halogen substituents (fluorinated D1‐F chlorinated D1‐Cl) are developed probe working mechanism halogenated variation OSCs. Unlike D1‐H continuous charge distributions, D1‐Cl show isolated positive distribution benzene‐core negative thiophene, offering stronger non‐covalent interactions both (PM6) (L8‐BO), especially D1‐Cl. Consequently, D1‐Cl‐treated obtains an optimized phase separation improved molecular packing, boosting PCE 18.59% device stability OSCs, 17.62% for D1‐H‐treated counterparts. Moreover, using D18:L8‐BO D18:BTP‐eC9 as layers, binary OSCs impressive PCEs 19.29% 19.39%, respectively. This work indicates that halogenation engineering can effectively regulate improving elucidates underlying mechanism.

Language: Английский

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Over 18% Efficiency from Halogen‐Free Solvent‐Processed Polymer Solar Cells Enabled by Asymmetric Small Molecule Acceptors with Fluoro‐Thienyl Extended Terminal

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

Published: Jan. 19, 2025

Abstract The potential impact of end‐group (EG) in non‐fullerene acceptor (NFA) on enabling green solvent‐processable polymer solar cells (PSCs) remains underexplored, offering opportunities for advancements environmentally friendly PSC development. Herein, the EG 1′,1′‐dicyanomethylene‐4‐fluoro‐5‐thienyl‐3‐indanone (IC‐FT) is developed by modifying state‐of‐the‐art Y6 derivative NFA, BTP‐4F, resulting two novel NFAs, namely BTP‐FT and BTP‐2FT. Distinctively, this study reveals that it noncovalent F···S interaction, other than commonly believed strong hydrogen bonding F···H plays a key role determining final molecular conformation, as confirmed means 2D NMR Gibbs free energy calculations. asymmetric possesses an upshifted lowest unoccupied orbital level enhances solubility toluene. Consequently, can mitigate phase separation, promote formation nanofibrillar morphology, facilitate exciton dissociation, ultimately enhance performance PSCs, achieving high open circuit voltage 0.900 V power conversion efficiency (PCE) 17.56%. Furthermore, ternary blend PM6:BTP‐FT:BTP‐4F achieves PCE 18.39% devices processed from This offers perspective NFA design high‐efficiency eco‐friendly processable PSCs enriching array electron‐withdrawing EGs molecules.

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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Defect and Donor Manipulated Highly Efficient Electron–Hole Separation in a 3D Nanoporous Schottky Heterojunction

JACS Au, Journal Year: 2023, Volume and Issue: 3(11), P. 3127 - 3140

Published: Oct. 21, 2023

Given the rapid recombination of photogenerated charge carriers and photocorrosion, transition metal sulfide photocatalysts usually suffer from modest photocatalytic performance. Herein, S-vacancy-rich ZnIn2S4 (VS-ZIS) nanosheets are integrated on 3D bicontinuous nitrogen-doped nanoporous graphene (N-npG), forming heterostructures with well-fitted geometric configuration (VS-ZIS/N-npG) for highly efficient hydrogen production. The VS-ZIS/N-npG presents ultrafast interfacial electrons captured by S vacancies in VS-ZIS holes neutralization behaviors extra free N-npG during photocatalysis, which demonstrated situ XPS, femtosecond transient absorption (fs-TA) spectroscopy, transient-state surface photovoltage (TS-SPV) spectra. simulated rearrangement DFT calculations also verify separation tendency carriers. Thus, optimized hierarchical heterojunction 1.0 wt % exhibits a comparably high generation rate 4222.4 μmol g–1 h–1, is 5.6-fold higher than bare 12.7-fold ZIS without vacancies. This work sheds light rational design carrier transfer paths to facilitate provides further hints heterostructure photocatalysts.

Language: Английский

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