Tuning of the Polymeric Nanofibril Geometry via Side-Chain Interaction toward 20.1% Efficiency of Organic Solar Cells

Journal of the American Chemical Society, Год журнала: 2024, Номер unknown

Опубликована: Дек. 2, 2024

Constructing fibril morphology has been believed to be an effective method of achieving efficient exciton dissociation and charge transport in organic solar cells (OSCs). Despite emerging endeavors on the fibrillization semiconductors via chemical structural design or physical manipulation, tuning geometry, i.e., width length, for tailored optoelectronic properties remains studied depth. In this work, a series alkoxythiophene additives featuring varied alkyl side chains connected thiophene are designed modulate growth aggregates cutting-edge polymer donors PM6 D18. Molecular dynamics simulations morphological characterizations reveal that these preferentially locate near entangle with donors, which enhance conjugated backbone stacking form nanofibrils expanding from 12.6 21.8 nm length increasing 98.3 232.7 nm. This nanofibril structure is feasible acquire simultaneously. By integrating L8-BO as donor acceptor layers pseudo-bulk heterojunction (p-BHJ) OSCs layer-by-layer deposition, improvement power conversion efficiency (PCE) 18.7% 19.8% observed, contributed by enhanced light absorption, transport, reduced recombination. The versatility also verified D18:L8-BO OSCs, PCE 19.3% 20.1%, among highest values reported OSCs.

Язык: Английский

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20.6% Efficiency Organic Solar Cells Enabled by Incorporating a Lower Bandgap Guest Nonfullerene Acceptor Without Open‐Circuit Voltage Loss

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 28, 2025

Abstract Simultaneously mitigating both photovoltage and photocurrent losses is crucial for organic solar cells (OSCs) to approach the Shockley–Queisser limit of ideal efficiency. Incorporating a narrower bandgap nonfullerene acceptor (NFA) as guest component into host donor:NFA system broadens absorption spectrum. However, this can also increase nonradiative decay rate according energy‐gap law. In work, ternary OSCs are constructed by combining narrow AQx‐2F (as NFA) with lower eC9 NFA), significantly enhancing generation without compromising photovoltage. The addition acts crystallization inducer, extending period increasing ordered packing distance. This leads suppressed trap states, elevated dielectric constant, prolonged exciton lifetime, balanced hole/electron transport, reduced recombination loss. Consequently, optimized D18:AQx‐2F:eC9 achieve champion power conversion efficiency (PCE) 20.6% high open‐circuit voltage 0.937 V, short‐circuit current density 27.2 mA cm −2 fill factor 80.8%, validated an independently certified PCE 20.0%, establishing new benchmark bulk heterojunction OSCs. work demonstrates effective method simultaneously mitigate losses, paving way high‐performance

Язык: Английский

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Extending Exciton Diffusion Length via an Organic‐Metal Platinum Complex Additive for High‐Performance Thick‐Film Organic Solar Cells

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 6, 2025

The long exciton diffusion length (LD) plays an important role in promoting dissociation, suppressing charge recombination, and improving the transport process, thereby performance of organic solar cells (OSCs), especially thick-film OSCs. However, limited LD hinders further improvement device as film thickness increases. Here, organic-metal platinum complex, namely TTz-Pt, is synthesized served a solid additive into D18-Cl:L8-BO system. addition TTz-Pt enhanced crystallinity blends, reduced energy disorder, trap density, decreased non-radiative recombination binding energy, which conducive to prolonging TTz-Pt-treated film, facilitating dissociation process along with inhibiting recombination. Consequently, D18:L8-BO:IDIC (100 nm) exhibits champion power conversion efficiency (PCE) 20.12% (certified 19.54%), one highest PCEs reported for OSCs date. Remarkably, record-breaking PCE 18.84% yielded active layer 300 nm. Furthermore, superior universality This work provides simple universal approach extending by introducing complex achieve highly efficient

Язык: Английский

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Inverted organic solar cells with an in situ-derived SiOxNy passivation layer and power conversion efficiency exceeding 18%

Nature Photonics, Год журнала: 2025, Номер unknown

Опубликована: Янв. 9, 2025

Язык: Английский

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Perspective on Flexible Organic Solar Cells for Self-Powered Wearable Applications

ACS Applied Materials & Interfaces, Год журнала: 2025, Номер unknown

Опубликована: Янв. 15, 2025

The growing advancement of wearable technologies and sophisticated sensors has driven the need for environmentally friendly reliable energy sources with robust mechanical stability. Flexible organic solar cells (OSCs) have become promising substitutes traditional solutions thanks to their remarkable flexibility high power conversion efficiency (PCE). These unique properties allow flexible OSCs seamlessly integrate diverse devices substrates, making them an excellent choice powering various electronic by efficiently harvesting energy. This review summarizes recent achievements in from perspective self-powered applications. It discusses advancements materials, including substrates transparent electrodes, evaluates performance criteria, compares PCEs rigid counterparts. Subsequently, novel applications are explored. Finally, a summary perspectives on current challenges obstacles facing wearables provided, aiming inspire further research toward practical implementations.

Язык: Английский

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A dendritic hexamer acceptor enables 19.4% efficiency with exceptional stability in organic solar cells

Nature Communications, Год журнала: 2025, Номер 16(1)

Опубликована: Янв. 20, 2025

Язык: Английский

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Naphthalene diimide-based cathode interlayer material enables 20.2% efficiency in organic photovoltaic cells

Science China Chemistry, Год журнала: 2024, Номер 67(12), С. 4194 - 4201

Опубликована: Авг. 30, 2024

Язык: Английский

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Binary Organic Solar Cells with >19.6% Efficiency: The Significance of Self-Assembled Monolayer Modification

ACS Energy Letters, Год журнала: 2024, Номер 9(9), С. 4209 - 4217

Опубликована: Авг. 1, 2024

Improving the uniformity and density of self-assembled monolayers (SAMs) is crucial to elevate photovoltaic performance organic solar cells (OSCs). Herein, we introduced small molecules 1-hydroxybenzotriazole (HOBT) modulate distribution electrical properties (4-(7H-dibenzo[c,g]carbazol-7-yl)butyl)phosphonic acid (4PADCB) on indium tin oxide (ITO) transparent electrodes in an innovative manner. The hydroxyl group HOBT interacts with phosphate SAMs, while steric repulsion exerted by backbone efficiently regulates SAMs. This led a more uniform dense SAMs ITO. Furthermore, HOBT-modified have improved crystallization vertical phase separation upper active layer. Consequently, PM6:BTP-eC9 binary OSCs based exhibit impressive PCE 19.66%. Our work presents effective strategy for regulating SAM morphology offers promising approach advancing OSCs.

Язык: Английский

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Local Dipole Modulation Toward High Fill Factor in Organic Solar Cells

Advanced Materials, Год журнала: 2024, Номер 36(41)

Опубликована: Авг. 12, 2024

Abstract Dipole moment arrangement in organic semiconductors plays a critical role affecting the intermolecular packing, determining optoelectronic properties and device performance. Here, to get desired fill factor (FF) values solar cells (OSCs), local dipole of non‐fullerene acceptors (NFAs) is modulated by changing molecular asymmetries. Two NFAs, AA‐1 AA‐2 are designed synthesized, which have different substitutions alkyl alkoxyl groups. The unidirectional asymmetry creates distinct dipoles, while bidirectional mitigates variation. Despite minimal impact on monomolecular properties, significantly influences terminal group packing modes film state. This, turn, enhances relative dielectric constant, prolongs exciton lifetime, reduces sub‐bandgap defect states. Consequently, PBDB‐TF:AA‐2‐based OSCs achieve an exceptional FF 0.830 power conversion efficiency (PCE) 18.3%, with ternary reaching PCE 19.3%. This work highlights potential modulation material design ideal for high‐performance OSCs.

Язык: Английский

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Equally high efficiencies of organic solar cells processed from different solvents reveal key factors for morphology control

Nature Energy, Год журнала: 2024, Номер unknown

Опубликована: Дек. 4, 2024

Abstract The power conversion efficiency of organic solar cells (OSCs) is exceeding 20%, an advance in which morphology optimization has played a significant role. It generally accepted that the processing solvent (or mixture) can help optimize morphology, impacting OSC efficiency. Here we develop OSCs show strong tolerance to range solvents, with all devices delivering high efficiencies around 19%. By investigating solution states, film formation dynamics and characteristics processed films both experimentally computationally, identify key factors control is, interactions between side chains acceptor materials as well donor materials. Our work provides new understanding on long-standing question effective guides design towards practical applications, where green solvents are required for large-scale processing.

Язык: Английский

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