Advantages, challenges and molecular design of different material types used in organic solar cells

Nature Reviews Materials, Journal Year: 2023, Volume and Issue: 9(1), P. 46 - 62

Published: Dec. 15, 2023

Language: Английский

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Isomerization strategy on a non-fullerene guest acceptor for stable organic solar cells with over 19% efficiency

Energy & Environmental Science, Journal Year: 2023, Volume and Issue: 16(7), P. 3119 - 3127

Published: Jan. 1, 2023

Isomeric non-fullerene acceptor guest with large π-conjugation skeleton is used to construct stable organic solar cells efficiencies over 19%.

Language: Английский

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Dithienoquinoxalineimide‐Based Polymer Donor Enables All‐Polymer Solar Cells Over 19 % Efficiency

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(21)

Published: Feb. 22, 2024

All-polymer solar cells (all-PSCs) have been regarded as one of the most promising candidates for commercial applications owing to their outstanding advantages such mechanical flexibility, light weight and stable film morphology. However, compared large amount new-emerging excellent polymer acceptors, development high-performance donor lags behind. Herein, a new D-π-A type donor, namely QQ1, was developed based on dithienoquinoxalineimide (DTQI) A unit, benzodithiophene with thiophene-conjugated side chains (BDTT) D alkyl-thiophene π-bridge, respectively. QQ1 not only possesses strong dipole moment, but also shows wide band gap 1.80 eV deep HOMO energy level -5.47 eV, even without halogen substituents that are commonly indispensable donors. When blended classic acceptor PY-IT, QQ1-based all-PSC delivers an PCE 18.81 %. After introduction F-BTA3 third component, record 19.20 % obtained, highest value reported so far all-PSCs. The impressive photovoltaic performance originates from broad absorption range, reduced loss, compact π-π stacking. These results provide insight in rational design novel nonhalogenated donors further

Language: Английский

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Tunable Donor Aggregation Dominance in a Ternary Matrix of All‐Polymer Blends with Improved Efficiency and Stability

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(15)

Published: July 7, 2023

Abstract Using two structurally similar polymer acceptors in constructing high‐efficiency ternary all‐polymer solar cells is a widely acknowledged strategy; however, the focus thus far has not been on how acceptor(s) would tune aggregation of donors, and furthermore film morphology device performance (efficiency stability). Herein, it reported that matching celebrity acceptor PY‐IT donor PBQx‐TCl results enhanced H ‐ PBQx‐TCl, which can be finely tuned by controlling amount second PY‐IV. Consequently, efficiency‐optimized PY‐IV weight ratio (0.2/1.2) leads to state‐of‐the‐art power conversion efficiency 18.81%, wherein light‐illuminated operational stability also along with well‐protected thermal stability. Such enhancements stabilities attributed optimization desired glass transition temperature target active layer based comprehensive characterization. In addition being high‐power case for cells, these are successful attempt using combined toward optimal morphology, provides theoretical basis construction other types organic photovoltaics beyond cells.

Language: Английский

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Isomerized Green Solid Additive Engineering for Thermally Stable and Eco‐Friendly All‐Polymer Solar Cells with Approaching 19% Efficiency

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(49)

Published: Oct. 12, 2023

Laboratory-scale all-polymer solar cells (all-PSCs) have exhibited remarkable power conversion efficiencies (PCEs) exceeding 19%. However, the utilization of hazardous solvents and nonvolatile liquid additives poses challenges for eco-friendly commercialization, resulting in trade-off between device efficiency operation stability. Herein, an innovative approach based on isomerized solid additive engineering is proposed, employing volatile dithienothiophene (DTT) isomers to modulate intermolecular interactions facilitate molecular stacking within photoactive layers. Through elucidating underlying principles DTT-induced polymer assembly level, a PCE 18.72% achieved devices processed with environmentally benign solvents, ranking it among highest record values all-PSCs. Significantly, such superiorities DTT-isomerized strategy afford excellent compatibility large-area blade-coating techniques, offering promising pathway industrial-scale manufacturing Moreover, these demonstrate enhanced thermal stability extrapolated T80 lifetime 14 000 h, further bolstering their potential sustainable technological advancement.

Language: Английский

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Step-by-Step Modulation of Crystalline Features and Exciton Kinetics for 19.2% Efficiency Ortho-Xylene Processed Organic Solar Cells

Nano-Micro Letters, Journal Year: 2023, Volume and Issue: 16(1)

Published: Nov. 23, 2023

Abstract With plenty of popular and effective ternary organic solar cells (OSCs) construction strategies proposed applied, its power conversion efficiencies (PCEs) have come to a new level over 19% in single-junction devices. However, previous studies are heavily based chloroform (CF) leaving behind substantial knowledge deficiencies understanding the influence solvent choice when introducing third component. Herein, we present case where newly designed asymmetric small molecular acceptor using fluoro-methoxylated end-group modification strategy, named BTP-BO-3FO with enlarged bandgap, brings different morphological evolution performance improvement effect on host system PM6:BTP-eC9, processed by CF ortho-xylene ( o -XY). detailed analyses supported series experiments, best PCE 19.24% for green solvent-processed OSCs is found be fruit finely tuned crystalline ordering general aggregation motif, which furthermore nourishes favorable charge generation recombination behavior. Likewise, can achieved replacing spin-coating blade coating active layer deposition. This work focuses commonly met yet frequently ignored issues building blends demonstrate cutting-edge device performance, hence, will instructive other OSC works future.

Language: Английский

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Solid Additive‐Assisted Selective Optimization Strategy for Sequential Deposited Active Layers to Construct 19.16% Efficiency Binary Organic Solar Cells

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 34(13)

Published: Dec. 21, 2023

Abstract Volatile solid (VS)‐additives are regarded as an effective tool to manipulate morphology of sequential deposited (SD) active layers for improving power conversion efficiencies (PCEs) organic solar cells (OSCs), while the independent effect VS‐additives on donor and acceptor is often overlooked. Herein, a new VS‐additive named 2‐(2‐methoxyphenyl)benzo[ b ]thiophene (BTO) synthesized applied in SD binary PM6/L8‐BO layers. Introducing it into bottom PM6 layer (PM6 + ), BTO has low volatility longer volatilization distance, which prolongs interaction time between L8‐BO /L8‐BO film, leading over‐aggregated L8‐BO. While inserting top (L8‐BO fast evaporation excellent dipole help enhance molecular absorption, crystallinity, ordered packing system. Therefore, optimized with proper phase separation achieved increase exciton dissociation charge transfer properties, restrain recombination energy loss OSCs, yielding impressive PCE over 19%. Furtherly, using D18 instead PM6, SD‐systems offer record‐high 19.16%. The developed selective optimization strategy provides deep insight working mechanism boosting OSCs.

Language: Английский

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Oligomeric Acceptor Enables High‐Performance and Robust All‐Polymer Solar Cells with 17.4% Efficiency

Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 13(20)

Published: April 6, 2023

Abstract Developing efficient and stable all‐polymer solar cells (all‐PSCs) has received increasing attention because of their mechanical robustness for flexible devices. Based on the CH‐series small molecule acceptors, a new polymer acceptor (PZC24) is reported obtains decent power conversion efficiency (PCE) 16.82% when blended with PM6. To further improve performance, an oligomeric (CH‐D1), which possesses same backbone structure as PZC24, proposed synthesized third component all‐PSC system. The creative strategy improves crystallinity molecular packing, can maintain charge transport channels all‐PSCs binary Therefore, PM6:PZC24:CH‐D1 based ternary devices exhibit impressive PCE 17.40%, among highest value all‐PSCs. Compared to PM6:PZC24, device exhibits enhanced photosoaking stability thermal stability, simultaneously. In addition, introduction does not weaken As such, display excellent 15.35%. Importantly, this shows universality in PM6:PY‐IT PM6:PY‐V‐γ improved PCEs over 17%. results provide feasible simultaneously photovoltaic herald bright future

Language: Английский

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Recent progress and prospects of dimer and multimer acceptors for efficient and stable polymer solar cells

Chemical Society Reviews, Journal Year: 2024, Volume and Issue: 53(9), P. 4674 - 4706

Published: Jan. 1, 2024

This review summarizes the recent progress, key design principles and prospects of dimer multimer acceptors for developing polymer solar cells (PSCs) with high efficiency long-term stability.

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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