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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Sequential Deposition of Multicomponent Bulk Heterojunctions Increases Efficiency of Organic Solar Cells

Advanced Materials, Год журнала: 2023, Номер 35(12)

Опубликована: Янв. 18, 2023

Constructing tandem and multi-blend organic solar cells (OSCs) is an effective way to overcome the absorption limitations of conventional single-junction devices. However, these methods inevitably require tedious multilayer deposition or complicated morphology-optimization procedures. Herein, sequential utilized as simple method fabricate multicomponent OSCs with a double-bulk heterojunction (BHJ) structure active layer further improve photovoltaic performance. Two efficient donor-acceptor pairs, D18-Cl:BTP-eC9 PM6:L8-BO, are sequentially deposited form D18-Cl:BTP-eC9/PM6:L8-BO double-BHJ layer. In OSCs, light significantly improved, optimal morphology also retained without requiring more optimization involved in quaternary blends. Compared blend devices, energy loss (Eloss ) reduced by rationally matching each donor appropriate acceptor. Consequently, power conversion efficiency (PCE) improved from 18.25% for 18.69% PM6:L8-BO based binary 19.61% OSCs. contrast, D18-Cl:PM6:L8-BO:BTP-eC9 exhibited dramatically PCE 15.83%. These results demonstrate that strategy, relatively processing procedure, can potentially enhance device performance lead widespread use.

Язык: Английский

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Molecular interaction induced dual fibrils towards organic solar cells with certified efficiency over 20%

Nature Communications, Год журнала: 2024, Номер 15(1)

Опубликована: Авг. 10, 2024

The nanoscale fibrillar morphology, featuring long-range structural order, provides abundant interfaces for efficient exciton dissociation and high-quality pathways effective charge transport, is a promising morphology high performance organic solar cells. Here, we synthesize thiophene terminated non-fullerene acceptor, L8-ThCl, to induce the fibrillization of both polymer donor host that surpasses 20% efficiency milestone After adding original weak less continuous nanofibrils donors, i.e. PM6 or D18, are well enlarged refined, whilst acceptor L8-BO also assembles into with enhanced order. By adapting layer-by-layer deposition method, order can be retained significantly boost power conversion efficiency, specific values 19.4% 20.1% PM6:L8-ThCl/L8-BO:L8-ThCl D18:L8-ThCl/L8-BO:L8-ThCl devices, latter being certified 20.0%, which highest reported so far single-junction

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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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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Electrostatic force promoted intermolecular stacking of polymer donors toward 19.4% efficiency binary organic solar cells

Nature Communications, Год журнала: 2023, Номер 14(1)

Опубликована: Окт. 9, 2023

Conjugated polymers are generally featured with low structural order due to their aromatic and irregular units, which limits light absorption charge mobility in organic solar cells. In this work, we report a conjugated molecule INMB-F that can act as molecular bridge via electrostatic force enhance the intermolecular stacking of BDT-based polymer donors toward efficient stable Molecular dynamics simulations synchrotron X-ray measurements reveal electronegative adsorb on electropositive main chain increase donor-donor interactions, leading enhanced shortened π-π distance consequently transport ability. Casting non-fullerene acceptor layer top modified donor fabricate cells layer-by-layer deposition evidences significant power conversion efficiency boosts range photovoltaic systems. A 19.4% (certified 18.96%) is realized PM6/L8-BO binary devices, one highest reported efficiencies material system. The by also leads six-fold enhancement operational stability

Язык: Английский

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Refined molecular microstructure and optimized carrier management of multicomponent organic photovoltaics toward 19.3% certified efficiency

Energy & Environmental Science, Год журнала: 2023, Номер 16(5), С. 2262 - 2273

Опубликована: Янв. 1, 2023

Molecular microstructure and carrier management were optimized correlated, double-channel recombination suppression enabled a record certified efficiency of 19.3% for asymmetric acceptor-based organic photovoltaics.

Язык: Английский

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Ternary All‐Polymer Solar Cells with Efficiency up to 18.14% Employing a Two‐Step Sequential Deposition

Advanced Materials, Год журнала: 2022, Номер 35(7)

Опубликована: Ноя. 22, 2022

Abstract Achieving a finely tuned active layer morphology with suitable vertical phase to facilitate both charge generation and transport has long been the main goal for pursuing highly efficient bulk heterojunction all‐polymer solar cells (all‐PSCs). Herein, solution address above challenge via synergistically combining ternary blend strategy layer‐by‐layer (LbL) procedure is proposed. By introducing synthesized polymer acceptor ( P A ), PY‐Cl, higher crystallinity into designed host PY‐SSe‐V, distribution molecular ordering of LbL‐type all‐PSCs can be improved in comparison PM6/PY‐SSe‐V binary all‐PSCs. The formation superior microstructure not only promote extraction properties but also reduce energetic disorder non‐radiative recombination loss, thus improving all three photovoltaic parameters simultaneously. Consequently, PM6/(PY‐SSe‐V:PY‐Cl) show best efficiency 18.14%, which among highest values reported date This work provides facile effective obtaining high‐efficiency

Язык: Английский

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Recent Developments of Polymer Solar Cells with Photovoltaic Performance over 17%

Advanced Functional Materials, Год журнала: 2023, Номер 33(14)

Опубликована: Янв. 22, 2023

Abstract With the emergence of ADA'DA‐type (Y‐series) non‐fullerene acceptors (NFAs), power conversion efficiencies (PCEs) organic photovoltaic devices have been constantly refreshed and gradually reached 20% in recent years (19% for single junction tandem device). The possess specific design concept, which greatly enrich NFA types excellent compatibility with many donor materials. It is gratifying to note that previously underperforming materials combine these regulated shine again. Nowadays, concept modular widely used research donors, injecting new vitality into field photovoltaics. Furthermore, also promote multicomponent devices, bilayer processing solvent engineering, additive engineering. Herein, latest progresses polymer solar cells efficiency over 17% are briefly reviewed from aspects active material design, interface development, device technology. At last, opportunities challenges commercialization future discussed.

Язык: Английский

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Over 18% Efficiency of All‐Polymer Solar Cells with Long‐Term Stability Enabled by Y6 as a Solid Additive

Advanced Materials, Год журнала: 2023, Номер 35(28)

Опубликована: Апрель 6, 2023

Morphology control greatly influences the power conversion efficiency (PCE) and long-term stability of all-polymer solar cells (all-PSCs); however, it remains challenging owing to their complex crystallization behavior. Herein, a small amount Y6 (2 wt%) is introduced as solid additive into PM6:PY-DT blend. remained inside active layer interacted with PY-DT form well-mixed phase. Increased molecular packing, enlarged phase separation size, decreased trap density are observed for Y6-processed The corresponding devices showed simultaneously improved short-circuit current fill factor, achieving high PCE over 18% excellent stability, T80 lifetime 1180 h an extrapolated T70 9185 at maximum point tracking (MPP) conditions under continuous one-sun illumination. This Y6-assisted strategy successfully applied other blends, demonstrating its universality all-PSCs. work paves new way fabrication all-PSCs superior stability.

Язык: Английский

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