Cascaded Energy and Charge Transfer Synergistically Prompting 18.7% Efficiency of Layered Organic Solar Cells with 1.48 eV Bandgap

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

Published: Jan. 2, 2025

Abstract Series of layer‐by‐layer organic solar cells (LOSCs) are constructed by sequentially spin‐coating donor layer and acceptor layers. A champion power conversion efficiency (PCE) 18.79% is achieved from the LOSCs with PBQx‐TCl/ITIC/PY‐DT as active layers, which should be one top values among OSCs optical bandgap over 1.48 eV. The middle material ITIC has a complementary photon harvesting range PBQx‐TCl PY‐DT, leading to enhanced Meanwhile, can play vital role in energy charge transfer relay increase exciton utilization transport, confirmed varied FFs normal or inverted ITIC/PY‐DT PY‐DT/ITIC Over 7% PCE improvement employing form cascaded This work may provide an efficient strategy for improving performance LOSCs.

Language: Английский

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Emergence of Low-Cost and High-Performance Nonfused Ring Electron Acceptors

Accounts of Chemical Research, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 20, 2024

ConspectusOrganic solar cells (OSCs) have garnered significant attention in academic and industrial circles due to their advantages such as lightweight, excellent bending performance, the ability be fabricated into semitransparent devices. Since proposal of bulk heterojunction concept by Heeger et al. 1995, conjugated polymer/fullerene pairs gradually emerged optimal choice for active layer materials OSCs. Fullerene derivatives were preferred electron acceptors OSCs because high mobility. However, limitations insufficient light absorption, limited derivative potential, poor energy level tunability, power conversion efficiency (PCE) based on fullerene has encountered a bottleneck approximately 12%, despite continuous updates polymer donor over nearly two decades development, leading gradual decline importance. By contrast, nonfullerene (NFAs) gained dominance this field since first appearing 2015, thanks tunable absorption spectrum, adjustable levels, modifiable chemical structure. Among acceptors, fused-ring (FREAs) ITIC Y6 achieved progress, boosting PCE 20%. This milestone achievement indicates potential commercial applications. synthesis process FREA is complex often constrained low-yield ring-closure reactions, resulting costs.The molecular backbone nonfused ring (NFREAs) composed single bonds, which enables adoption modular mainly via Stille (based organotin reactant) and/or Suzuki organoboron coupling or C–H activation (without prefunctionalization) avoids ring-closing thus making them alternative acceptors. To achieve planar minimize loss conformational rotation, our team innovatively used intramolecular noncovalent interactions replacement traditional covalent bonds. Furthermore, address issues solubility excessive aggregation during film formation NFREAs, we strategically introduced sterically hindered side groups, 2,6-bis(alkyloxy)phenyl diphenylamino, design, effectively mitigating these problems. These innovative design concepts significantly advanced development high-performance NFREAs increasing from research community. The PCEs improved less than 10% close 20% initial discovery. optimizing device fabrication process, 19%, comparable that FREAs. article will delve evolution latest progress aiming provide valuable insights guidance cost-effective NFREA materials.

Language: Английский

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Recent Progress and Applications of NanoIR‐AFM in Morphological Characterization of Organic Solar Cells

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 9, 2024

Abstract Organic solar cells (OSCs) are gaining attention in building‐integrated and agricultural photovoltaics due to their light weight, mechanical flexibility, low‐cost solution processability. To achieve commercial viability, understanding the relationships between active layer material structure, film morphology, photovoltaic performance is crucial. Nanoscale infrared spectroscopy coupled with atomic force microscopy (nanoIR‐AFM) offers an advanced characterization of morphology at high resolution help understand OSC performance. This review outlines recent developments applications nanoIR‐AFM research, detailing its principles, instruments, functions. Strategies enhance morphological by discussed, offering insights into evolution device The highlights challenges faced potential role advancing technology. As continues evolve, it will play a critical development, providing essential technical means for further progress.

Language: Английский

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Regulating Molecular Structure of S,N‐Heteroacene Non‐fullerene Acceptors to Achieve Efficient Photoelectric Properties^†

Chinese Journal of Chemistry, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 16, 2024

Comprehensive Summary The ternary strategy has demonstrated its efficacy in improving charge transport organic solar cells (OSCs). Here, three novel non‐fullerene acceptors, SN6C9‐4F, SN6C9‐4Cl and SN6C10‐4F, based on S,N‐heteroacene linear backbone were designed synthesized. acceptors exhibit excellent molecular coplanarity, high crystallinity possess a deep‐lying lowest unoccupied orbital energy level, which is beneficial for injection field‐effect transistors (OFETs). Notably, the OFET devices all achieved impressive electron mobilities, with SN6C10‐4F achieving up to 0.73 cm 2 ·V –1 ·s , one of highest values among A‐D‐A type small molecules. In addition, OSCs device PBDB‐T:SN6C9‐4F exhibited best power conversion efficiency 12.07% owing optimal morphology enhanced transport. Moreover, incorporation SN6C9‐4F into efficient PM6:L8‐BO binary system form resulted extended absorption range, donor crystallization, improved more balanced transport, ultimately leading an improvement PCE from 17.78% 18.32%. This study highlights potential developing distinct structures Y‐series broaden regulate providing approach enhance OSCs.

Language: Английский

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Endgroup engineering of the third component for high-efficiency ternary organic solar cells

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: unknown, P. 156906 - 156906

Published: Oct. 1, 2024

Language: Английский

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Boosting the Efficiency and Mechanical Stability of Organic Solar Cells Through a Polymer Acceptor by Reducing the Elastic Modulus

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

Published: Feb. 13, 2025

Abstract Organic solar cells (OSCs) are regarded as one of the most promising flexible power sources due to their lightweight and properties, with improvement photovoltaic mechanical performance. To improve current density conversion efficiency (PCE), mPh4F‐TS (TS) PYSe2F‐T (PA) introduced into binary host, PM6/mPh4F‐TT (PM6/TT) third components. It is demonstrated that corresponding ternary devices, in both rigid achieved superior efficiencies (19.6%/17.7% for PM6/TT+TS, 19.2%/17.4% PM6/TT+PA) outperform counterparts (18.3%/16.4%). However, distinct differences performance observed between polymer acceptor small‐molecular (TS). The PM6/TT+PA significantly improved stability devices a lower elastic modulus 3.6 GPa, while PM6/TT+TS resulted opposite effect higher 5.5 GPa. Through in‐depth investigation, clear correlation modulus, crack density, active layer blends successfully established, revealing key role reducing enhancing OSCs. This study provides important guidance development high robustness.

Language: Английский

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Indacenodithiophene‐Based Medium‐Bandgap Guest Acceptor Enables High‐Efficiency Ternary Organic Solar Cells

Macromolecular Rapid Communications, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 14, 2025

The ternary organic solar cells (OSCs) have been proven to be an effective strategy for achieving high power conversion efficiency (PCE), exhibiting substantial potential continuous enhancement of device performance. In this work, a novel nonfullerene acceptor, IDT-FN, is developed utilizing renowned indacenodithiophene (IDT) core and moderately intense electron-withdrawing terminal groups, serving as the third component in OSCs. IDT-FN demonstrates excellent complementary light absorption cascaded energy levels with host materials D18 CH-6F, resulting enhanced photon harvesting charge transport within blend. Therefore, even as-cast manages surpass optimal binary device, superior PCE 17.34% compared latter's 17.08%. Through optimization, devices attain impressive 18.32%, accompanied by open-circuit voltage (Voc) 0.897 V, fill factor 0.745, short-circuit current density (Jsc) 27.41 mA cm-2. This significant success IDT-based medium-bandgap guests achieve state-of-the-art

Language: Английский

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Strategies and Mechanisms To Minimize Energy Loss in Non-Fullerene Bulk Heterojunction Organic Solar Cells: Experimental and Computational Approaches

Energy & Fuels, Journal Year: 2025, Volume and Issue: unknown

Published: March 6, 2025

Language: Английский

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Green synthesis of simple electron acceptors featuring non-covalent conformational locking and their application in ternary polymer solar cells achieving 18.61% efficiency

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 162659 - 162659

Published: April 1, 2025

Language: Английский

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Efficient Organic Solar Cells Fabricated with a High‐Boiling Solvent Via Morphology Modulation Using a Small Molecule Guest Donor

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

Published: April 17, 2025

Abstract It is necessary to employ high‐boiling solvents for the fabrication of large‐area organic solar cells (OSCs). However, controlling morphology achieve suitable phase separation high efficiency challenging when are used. In this study, HD‐1, a small molecular donor introduced, into PM6:BO‐4Cl blend as morphology‐modulating agent. This addition optimizes and enhances charge transport in ternary processed chlorobenzene (CB) solvent. The optimized active layer demonstrates improved dissociation capabilities while effectively suppressing recombination. Small‐area OSCs from CB solution achieves an power conversion (PCE), increasing 18.84% 19.42%. Furthermore, device demonstrated good tolerance thickness, with 300‐nm‐thick film achieving PCE exceeding 17%. Notably, blade‐coated module area 13.5 cm 2 , fabricated air using CB, 16.48%, showing excellent application potential. study presents straightforward effective approach optimizing enhancing fabricate solvent, highlighting its potential large‐scale production practical applications.

Language: Английский

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