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, Journal Year: 2022, Volume and Issue: 35(6)

Published: Nov. 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%.

Language: Английский

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

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(12)

Published: Jan. 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.

Language: Английский

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18.2%-efficient ternary all-polymer organic solar cells with improved stability enabled by a chlorinated guest polymer acceptor

Joule, Journal Year: 2023, Volume and Issue: 7(1), P. 221 - 237

Published: Jan. 1, 2023

Language: Английский

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High‐Efficiency and Mechanically Robust All‐Polymer Organic Photovoltaic Cells Enabled by Optimized Fibril Network Morphology

Advanced Materials, Journal Year: 2022, Volume and Issue: 35(9)

Published: Dec. 20, 2022

All-polymer organic photovoltaic (OPV) cells possessing high performance and mechanical robustness are promising candidates for flexible wearable devices. However, developing photoactive materials with good properties so far remains challenging. In this work, a polymer donor PBDB-TF weight-average molecular weight (Mw ) is introduced to enable highly efficient all-polymer OPV featuring excellent reliability. By incorporating the high-Mw as third component into PBQx-TF:PY-IT blend, bulk heterojunction morphology finely tuned more compact π-π stacking distance, affording pathways charge transport well stress dissipation. Hence, based on ternary blend film demonstrate maximum power conversion efficiency (PCE) of 18.2% an outstanding fill factor 0.796. The cell delivers decent PCE 16.5% stability. These results present strategy address boost cells.

Language: Английский

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Over 17.4% Efficiency of Layer‐by‐Layer All‐Polymer Solar Cells by Improving Exciton Utilization in Acceptor Layer

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(28)

Published: March 27, 2023

Abstract Layer‐by‐layer all‐polymer solar cells (LbL all‐PSCs) are prepared with PM6 and PY‐IT by using sequential spin coating method. The exciton dissociation efficiency in acceptor layer near electrode is rather low due to the limited diffuse distance impossible energy transfer from narrow bandgap wide donor. In this study, less incorporated into enhance electrode. A power conversion (PCE) of 17.45% achieved LbL all‐PSCs incorporating 10 wt% layer, which much larger than 16.04% PCE PM6/PY‐IT‐based all‐PSCs. Over 8% enhancement can be realized attributed enhanced utilization layers confirmed quenched photoluminescence (PL) emission PY‐IT:PM6 films. Meanwhile, charge transport optimized PM6, as molecular arrangement. This study indicates that strategy donor has great potential fabricating efficient improving

Language: Английский

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Improved Molecular Ordering in a Ternary Blend Enables All‐Polymer Solar Cells over 18% Efficiency

Advanced Materials, Journal Year: 2022, Volume and Issue: 35(8)

Published: Dec. 3, 2022

Although all-polymer solar cells (all-PSCs) show great commercialization prospects, their power conversion efficiencies (PCEs) still fall behind small molecule acceptor-based counterparts. In blends, the optimized morphology and high molecular ordering are difficult to achieve since there is troublesome competition between crystallinity of polymer donor acceptor during film-formation process. Therefore, it challenging improve performance all-PSCs. Herein, a ternary strategy adopted modulate an blend, in which PM6:PY-82 selected as host blend PY-DT employed guest component. Benefiting from favorable miscibility two acceptors higher regularity PY-DT, matrix features well-defined fibrillar improved ordering. Consequently, champion PM6:PY-82:PY-DT device produces record-high PCE 18.03%, with simultaneously open-circuit voltage, short-circuit current fill factor comparison binary devices. High-performance large-area (1 cm2 ) thick-film (300 nm) all-PSCs also successfully fabricated PCEs 16.35% 15.70%, respectively.Moreover, 16.5 organic module affords encouraging 13.84% when using non-halogenated solvent , showing potential "Lab-to-Fab" transition

Language: Английский

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

Advanced Materials, Journal Year: 2022, Volume and Issue: 35(7)

Published: Nov. 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

Language: Английский

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Prospects and challenges for perovskite-organic tandem solar cells

Joule, Journal Year: 2023, Volume and Issue: 7(3), P. 484 - 502

Published: March 1, 2023

Language: Английский

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Understanding the Role of Removable Solid Additives: Selective Interaction Contributes to Vertical Component Distributions

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(32)

Published: May 11, 2023

Abstract Sequentially deposited organic solar cells (SD‐OSCs) have attracted great attention owing to their ability in achieving a more favorable, vertically phase‐separated morphology avoid the accumulation of counter charges at absorber/transporting layer interfaces. However, processing SD‐OSCs is still quite challenging preventing penetration small‐molecule acceptors into polymer donor via erosion or swelling. Herein, solid additives (SAs) with varied electrostatic potential distributions and steric hinderance are introduced investigate effect evaporation dynamics selective interaction on vertical component distribution. Multiple modelings indicate that π – dominates interactions between aromatic SAs active components. Among them, p ‐dibromobenzene shows stronger while 2‐chloronaphthalene (2‐CN) interacts preferably acceptor. Combining depth‐dependent morphological study aided by multiple X‐ray scattering methods, it concluded can drive stronger‐interaction upward surface, having minor impact overall molecular packing. Ultimately, 2‐CN‐treated devices reduced acceptor concentration bottom surface deliver high power conversion efficiency 19.2%, demonstrating effectiveness applying improve OSCs using proper structure.

Language: Английский

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Hot‐Casting Strategy Empowers High‐Boiling Solvent‐Processed Organic Solar Cells with Over 18.5% Efficiency

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(3)

Published: Aug. 9, 2023

Abstract Most top‐rank organic solar cells (OSCs) are manufactured by the halogenated solvent chloroform, which possesses a narrow processing window due to its low‐boiling point. Herein, based on two high‐boiling solvents, chlorobenzene (CB) and non‐halogenated green ortho‐xylene (OX), preparing active layers with hot solution is put forward enhance performance of OSCs. In situ test morphological characterization clarify that hot‐casting strategy assists in fast synchronous molecular assembly both donor acceptor layer, contributing preferable donor/acceptor ratio, vertical phase separation, stacking, beneficial charge generation extraction. Based PM6:BO‐4Cl, OSCs wide achieve efficiencies 18.03% CB 18.12% OX, much higher than devices processed room temperature solution. Moreover, PM6:BTP‐eC9 deliver remarkable fill factor 80.31% efficiency 18.52% representing record value among binary solvent. This work demonstrates facile manipulate distribution arrangement for boosting solvents.

Language: Английский

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