Binary Organic Solar Cells Breaking 19% via Manipulating the Vertical Component Distribution

Advanced Materials, Год журнала: 2022, Номер 34(33)

Опубликована: Июнь 24, 2022

The variation of the vertical component distribution can significantly influence photovoltaic performance organic solar cells (OSCs), mainly due to its impact on exciton dissociation and charge-carrier transport recombination. Herein, binary devices are fabricated via sequential deposition (SD) D18 L8-BO materials in a two-step process. Upon independently regulating spin-coating speeds each layer deposition, optimal SD device shows record power conversion efficiency (PCE) 19.05% for single-junction OSCs, much higher than that corresponding blend casting (BC) (18.14%). Impressively, this strategy presents excellent universality boosting devices, exemplified by several nonfullerene acceptor systems. mechanism studies reveal with preferred components possesses high crystallinity, efficient splitting, low energy loss, balanced charge transport, resulting all-around enhancement performances. This work provides valuable approach high-efficiency shedding light understanding relationship between distribution.

Язык: Английский

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Fibrillization of Non‐Fullerene Acceptors Enables 19% Efficiency Pseudo‐Bulk Heterojunction Organic Solar Cells

Advanced Materials, Год журнала: 2022, Номер 35(6)

Опубликована: Ноя. 24, 2022

The structural order and aggregation of non-fullerene acceptors (NFA) are critical toward light absorption, phase separation, charge transport properties their photovoltaic blends with electron donors, determine the power conversion efficiency (PCE) corresponding organic solar cells (OSCs). In this work, fibrillization small molecular NFA L8-BO assistance fused-ring solvent additive 1-fluoronaphthalene (FN) to substantially improve device PCE is demonstrated. Molecular dynamics simulations show that FN attaches backbone as bridge enhance intermolecular packing , inducing 1D self-assembly into fine fibrils a compact polycrystal structure. incorporated pseudo-bulk heterojunction (P-BHJ) active layer D18 donor, enhanced transport, collection properties, leading from 16.0% an unprecedented 19.0% in D18/L8-BO binary P-BHJ OSC, featuring high fill factor 80%. This work demonstrates strategy for fibrillating NFAs performance OSCs.

Язык: Английский

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19.10% Efficiency and 80.5% Fill Factor Layer‐by‐Layer Organic Solar Cells Realized by 4‐Bis(2‐Thienyl)Pyrrole‐2,5‐Dione Based Polymer Additives for Inducing Vertical Segregation Morphology

Advanced Materials, Год журнала: 2022, Номер 35(6)

Опубликована: Ноя. 22, 2022

The morphology plays a key role in determining the charge generation and collection process, thus impacting performances of organic solar cells (OSCs). limited selection pool additives to optimize OSCs, especially for emerging layer-by-layer (LbL) impeding improvements photovoltaic performances. Herein, new method using conjugated polymers as improving LbL-OSCs is reported. Four PH, PS, PF, PCl are developed with different side chains. These exhibit poor donor materials BHJ devices, due unsuitable energy level alignment unfavorable molecular interactions. By contrast, they can be served efficient PM6 fibril matrix facilitating penetration BTP-eC9 forming an intertwined D/A bicontinuous network vertical segregation. Such optimized by chain engineering, which enables progressive improvement separation collection. As result, adding small amount additive, contributes champion PCE 19.10% high FF 80.5%.

Язык: Английский

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Interface Engineering for Highly Efficient Organic Solar Cells

Advanced Materials, Год журнала: 2023, Номер 36(16)

Опубликована: Март 3, 2023

Organic solar cells (OSCs) have made dramatic advancements during the past decades owing to innovative material design and device structure optimization, with power conversion efficiencies surpassing 19% 20% for single-junction tandem devices, respectively. Interface engineering, by modifying interface properties between different layers OSCs, has become a vital part promote efficiency. It is essential elucidate intrinsic working mechanism of layers, as well related physical chemical processes that manipulate performance long-term stability. In this article, advances in engineering aimed pursue high-performance OSCs are reviewed. The specific functions corresponding principles summarized first. Then, anode layer, cathode layer interconnecting devices discussed separate categories, engineering-related improvements on efficiency stability analyzed. Finally, challenges prospects associated application emphasis large-area, high-performance, low-cost manufacturing.

Язык: Английский

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High-Efficiency Ternary Organic Solar Cells with a Good Figure-of-Merit Enabled by Two Low-Cost Donor Polymers

ACS Energy Letters, Год журнала: 2022, Номер 7(8), С. 2547 - 2556

Опубликована: Июль 13, 2022

Here, we combine two donor polymers with a relatively short synthesis method and fabricate ternary organic solar cells (OSCs) high efficiency decent figure-of-merit. A series of characterizations show that the optimal morphology blend is result coupling competition PTQ10 PTVT-T, where molecular packing phase separation motif broken but strong aggregation PTVT-T suppressed, resulting in efficient charge transport collection, as well suppressed bimolecular recombination. Moreover, previously reported solvent-vapor-assisted casting method, taken an understanding-guided optimization, pushes system's to 19.11%. Furthermore, PTVT-T-containing systems clearly better light soaking thermal stability than binary control system, benefiting from durable polymer matrix. Our work provides useful approach for developing efficient, stable, low-cost OSCs based on state-of-the-art donor/acceptor through design.

Язык: Английский

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Donor–acceptor mutually diluted heterojunctions for layer-by-layer fabrication of high-performance organic solar cells

Nature Energy, Год журнала: 2024, Номер 9(2), С. 208 - 218

Опубликована: Янв. 9, 2024

Язык: Английский

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High-speed sequential deposition of photoactive layers for organic solar cell manufacturing

Nature Energy, Год журнала: 2022, Номер 7(11), С. 1087 - 1099

Опубликована: Окт. 27, 2022

Язык: Английский

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Recent advances in dopant-free organic hole-transporting materials for efficient, stable and low-cost perovskite solar cells

Energy & Environmental Science, Год журнала: 2022, Номер 15(9), С. 3630 - 3669

Опубликована: Янв. 1, 2022

This article reviews important advances in dopant-free organic hole-transporting materials for efficient and stable perovskite solar cells since 2020.

Язык: Английский

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In situandex situinvestigations on ternary strategy and co-solvent effects towards high-efficiency organic solar cells

Energy & Environmental Science, Год журнала: 2022, Номер 15(6), С. 2479 - 2488

Опубликована: Янв. 1, 2022

High efficiencies for organic solar cells are achieved. Two different morphology change paths revealed with both in situ and ex measurements.

Язык: Английский

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Solid Additive-Assisted Layer-by-Layer Processing for 19% Efficiency Binary Organic Solar Cells

Nano-Micro Letters, Год журнала: 2023, Номер 15(1)

Опубликована: Апрель 10, 2023

Morphology is of great significance to the performance organic solar cells (OSCs), since appropriate morphology could not only promote exciton dissociation, but also reduce charge recombination. In this work, we have developed a solid additive-assisted layer-by-layer (SAA-LBL) processing fabricate high-efficiency OSCs. By adding additive fatty acid (FA) into polymer donor PM6 solution, controllable pre-phase separation forms between and FA. This intermixed facilitates diffusion acceptor Y6 during LBL processing, due good miscibility fast-solvation FA with chloroform solution dripping. Interestingly, results in desired refined phase-separated domain vertical phase-separation structure better balance transport /collection dissociation. Consequently, binary single junction OSCs based on PM6:Y6 blend reach champion power conversion efficiency (PCE) 18.16% SAA-LBL which can be generally applicable diverse systems, e.g., PM6:L8-BO-based devices thick-film devices. The efficacy confirmed PM6:L8-BO, where record PCEs 19.02% 16.44% are realized for 100 250 nm active layers, respectively. work provides simple effective way control demonstrates promising methodology boosting industrial manufacturing

Язык: Английский

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