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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High‐Reproducibility Layer‐by‐Layer Non‐Fullerene Organic Photovoltaics with 19.18% Efficiency Enabled by Vacuum‐Assisted Molecular Drift Treatment

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(11)

Published: Jan. 28, 2024

Abstract The thin film deposition engineering of layer‐by‐layer (LbL) non‐fullerene organic solar cells (OSCs) favors vertical phase distributions donor:acceptor (D:A), effectively boosting the power conversion efficiency (PCE). However, previous strategies mainly aimed at optimizing morphology LbL films, and paid limited attention to reproducibility device performance. To achieve high performance maintain reproducibility, a strategy for hierarchical manipulation in OSCs is developed. A series devices are fabricated by introducing vacuum‐assisted molecular drift treatment (VMDT) donor or acceptor layer individually simultaneously elucidate functionalities this treatment. Essentially, VMDT provides an extended driving force manipulate molecules, resulting well‐defined distribution ordered packing. These enhancements facilitate improvement D:A interface area charge transport channel, ultimately contributing impressive PCEs 19.18% from 18.27% devices. More importantly, using overcomes notorious batch‐dependent heat degradation issues OSCs, leading excellent batch‐to‐batch enhanced stability This reported method promising available industrial laboratory use controllably OSCs.

Language: Английский

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Achieving 19.78%‐Efficiency Organic Solar Cells by 2D/1A Ternary Blend Strategy with Reduced Non‐Radiative Energy Loss

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(44)

Published: June 2, 2024

Abstract Reducing non‐radiative energy loss (∆ E nr ) is critical for enhancing the photovoltaic performance of organic solar cells (OSCs). To achieve this, a small molecular donor, LJ1, introduced as third component in host system D: A (D18: BTP‐eC9‐4F). The cascade‐like level alignment D18, and BTP‐eC9‐4F facilitates efficient charge transfer. LJ1's good solubility processing solvent high miscibility with delay precipitation BTP‐eC9‐4F, leading to improved phase morphology blend films. Additionally, LJ1 increases spacing between polymer donor (PD) molecule acceptor (SMA), optimizing film reducing OSCs. Ternary OSCs based on D18:LJ1:BTP‐eC9‐4F power conversion efficiency (PCE) 19.43% reduced ∆ . Notably, ternary device using D18:LJ1:L8‐BO attains an outstanding PCE 19.78%, which one highest OSC. work highlights effectiveness strategy OSC while minimizing

Language: Английский

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High Mobility Emissive Organic Semiconductors for Optoelectronic Devices

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 10, 2025

High mobility emissive organic semiconductors (HMEOSCs) are a kind of unique semiconducting material that simultaneously integrates high charge carrier and strong emission features, which not only crucial for overcoming the performance bottlenecks current optoelectronic devices but also important constructing high-density integrated devices/circuits potential smart display technologies electrically pumped lasers. However, development HMEOSCs is facing great challenges due to mutually exclusive requirements molecular structures packing modes between solid-state emission. Encouragingly, considerable advances on have been made with continuous efforts, successful integration these two properties within individual currently presents promising research direction in electronics. Representative progress, including design HMEOSCs, exploration their applications photoelectric conversion electroluminescent devices, especially photovoltaic cells, light-emitting diodes, transistors, summarized timely manner. The developing other related lasers, spin transistors discussed. We hope this perspective will boost rapid new mechanism understanding wide different fields entering stage.

Language: 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, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 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

Language: Английский

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Low‐Volatility Fused‐Ring Solid Additive Engineering for Synergistically Elongating Exciton Lifetime and Mitigating Trap Density Toward Organic Solar Cells of 20.5% Efficiency

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 12, 2025

Abstract Volatile solid additives (VSAs) with single or fused‐ring structures have attracted much attention for enhancing power conversion efficiencies (PCEs) of organic solar cells (OSCs). While the working mechanisms high‐volatility single‐ring been well studied, influence low‐volatility VSAs on molecular aggregations and exciton/carrier dynamics remains still unclear. Herein, 3,6‐dibromothieno[3,2‐b]thiophene (3,6TTBr) is selected as a representative VSA to elucidate its mechanism. Via theoretical experimental joint investigation, it found that rigid planar 3,6TTBr molecules adsorb onto terminal units L8‐BO (acceptor), inducing loose space adjacent molecules. The thus favors center‐terminal packing larger interfragment distance, which relieves over‐aggregation induces ordered packing. Consequently, treatment reduces aggregation‐caused quenching, photoluminescence quantum yield exciton lifetime film. combination above properties reduced trap density improved carrier transport in 3,6TTBr‐treated devices contributed PCE 20.1%. To validate broad applicability findings, 1,5‐dibromonaphthalene (1,5‐BN), another solid, explored. 1,5‐BN achieved an impressive 20.5%, verifying validity strategy boosting OSC performances.

Language: Английский

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High‐Performance Fatigue‐Resistant Dual‐ Polyrotaxane Hydrogel Electrolytes for Flexible Aqueous Zinc‐Ion Batteries

Small, Journal Year: 2025, Volume and Issue: unknown

Published: March 3, 2025

Abstract This study presents a novel anti‐fatigue hydrogel electrolyte with slip‐ring structure for next‐generation flexible wearable energy storage systems. Conventional quasi‐solid aqueous zinc‐ion batteries (ZIBs) electrolytes often suffer from mechanical degradation under repeated stress, limiting practical use. To overcome this, dual‐Polyrotaxane (DPR)‐polyacrylic acid (PAA) unique architecture is synthesized, that enhances durability, self‐healing, and adhesion. The interwoven DPR PAA networks distribute stress evenly, ensuring high ionic conductivity while preventing zinc dendrites parasitic reactions uniform deposition during cycling.When applied to quasi‐solid‐state Zn‐MnO₂ battery, this achieves specific capacity of 295 mAh g⁻¹ MnO₂ at 0.5C, retains 147 5C, shows 81.52% retention after 1000 cycles. battery also demonstrates exceptional stability, pairs lasting over 1750 h 5 mA cm⁻ 2 . Furthermore, it maintains reliable operation stresses like pressing, folding, twisting, making ideal applications. work advances design, offering durable, high‐performance solution

Language: Английский

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Synergistically modulating d-band centers of bimetallic elements for activating cobalt atoms and promoting water dissociation toward accelerating alkaline hydrogen evolution

Applied Catalysis B Environment and Energy, Journal Year: 2024, Volume and Issue: 351, P. 123972 - 123972

Published: April 24, 2024

Language: Английский

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Perovskite Solar Cells Dominated by Bimolecular Recombination─How Far Is the Radiative Limit?

ACS Energy Letters, Journal Year: 2024, Volume and Issue: 9(5), P. 2310 - 2317

Published: April 22, 2024

Here, we report an experimental demonstration of perovskite solar cells dominated by bimolecular recombination and critically analyze their performance against radiative limits. To this end, first establish a set quantitative benchmark characteristics expected from that are limited recombination. Transient as well steady-state intensity dependent measurements indicate our indeed operate at such limits with interface passivation comparable to the champion c-Si technology. Further, identify characterization schemes enable consistent back extraction parameters transient optoelectrical electroluminescence measurements. Remarkably, these predict important features dark current density vs voltage (J–V) Suns-VOC measurements, thus validating estimates methodology. Uniquely, work provides coherent interpretation diverse trends ranging J–V, Suns-VOC, steady-state, quantum yield. As such, insights shared in manuscript could have significant implications toward fundamental electronic processes further efficiency optimization Shockley–Queisser

Language: Английский

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Alleviating excessive aggregation of a non-fullerene acceptor by delaying and shortening the crystallization time to reduce the energy loss of ternary organic solar cells

Journal of Materials Chemistry C, Journal Year: 2024, Volume and Issue: 12(11), P. 4142 - 4156

Published: Jan. 1, 2024

PYIT was added to the PM6:Y6 system delay and shorten crystallization time of Y6. The ternary strategy has been successfully proven increase D/A interface area for faster exciton dissociation. E loss decreased (0.559 eV 0.539 eV), PCE increased (15.40% 17.05%).

Language: Английский

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