Layer‐by‐Layer Organic Solar Cells Enabled by 1,3,4‐Selenadiazole‐Containing Crystalline Small Molecule with Double‐Fibril Network Morphology

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

Published: March 27, 2024

A double-fibril network of the photoactive layer morphology is recognized as an ideal structure facilitating exciton diffusion and charge carrier transport for high-performance organic solar cells (OSCs). However, in layer-by-layer processed OSCs (LbL-OSCs), polymer donors small molecule acceptors (SMAs) are separately deposited, it challenging to realize a fibril pure SMAs with absence tight interchain entanglement polymers. In this work, crystalline (SMDs), named TDZ-3TR SeDZ-3TR, were designed introduced into L8-BO acceptor solution, forcing phase separation molecular fibrilization. SeDZ-3TR showed higher crystallinity lower miscibility than TDZ-3TR, enabling more driving force favor better fibrilization L8-BO. On other hand, two donor polymers PM6 D18 different widths lengths put together optimize layer. The simultaneously optimization layers resulted impressive power conversion efficiency (PCE) 19.38 % LbL-OSCs.

Language: Английский

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Pressure‐Controlled Nanoimprint Lithography Achieves over 20% Efficiency in Organic Solar Cells

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

Published: Feb. 9, 2025

Abstract Nanoimprint lithography (NIL) offers unprecedented control over active layer morphology in organic solar cells (OSCs), yet optimal processing conditions remain critical for maximizing device performance. Here, pressure‐dependent NIL fabrication of ordered interdigitated heterojunction structures is demonstrated D18/L8‐BO‐based OSCs, achieving exceptional performance through systematic pressure optimization. At an 50 bar, devices exhibit record‐setting metrics: 20.08% power conversion efficiency, 27.34 mA cm −2 short‐circuit current density, and 80.34% fill factor. The NIL‐patterned layers form well‐defined, solvent‐resistant nanopillar arrays (8.7–29 nm height) with enhanced light‐harvesting capabilities. Detailed characterization reveals improved molecular ordering both donor acceptor phases, while advanced spectroscopy demonstrates accelerated charge transfer dynamics reduced exciton dissociation diffusion times. This pressure‐optimized strategy simultaneously enhances the optical, morphological, electronic properties establishing a promising pathway toward commercial‐scale photovoltaic technology.

Language: Английский

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Allyl-terminated Small Molecule Donors Effectively Regulate Miscibility to Improve the Performance of Organic Solar Cells

Journal of Materials Chemistry C, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Optimization of small molecule donor morphology in OSCs: allyl group-driven enhancements H35 for superior PCEs 15.21% (ASM) and 10.78% (SMD:PA) via improved miscibility, domain structure, charge transfer.

Language: Английский

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Flexible near-infrared organic photodetectors for emergent wearable applications

Wearable electronics., Journal Year: 2024, Volume and Issue: 1, P. 53 - 77

Published: May 13, 2024

With the evolution of Industry 4.0, next-generation wearable devices have come under spotlight, where organic electronics are playing an important role due to their flexible form factor, high performance, and integration capability. Designed conform soft dynamic surfaces, photodetectors (OPDs) integrated arrays stand out for application potential in non-invasive biosensing bio-imaging, with inherent advantages mitigating motion artifacts – a notable limitation traditional, rigid photodetector systems. Leveraging near-infrared (NIR) spectrum's capability deep skin penetration minimal scattering human tissues, NIR OPDs especially capable precise diagnostics enhanced signal quality. The adaptable factor further broadens applications human-environment interaction, marking shift towards more responsive intelligent technologies. This review summarizes latest challenges breakthroughs OPDs, emphasizing effective strategies toward high-performance device units We discuss remaining outlook on vast reshaping our interaction surroundings.

Language: Английский

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Fine-tuning the hierarchical morphology of multi-component organic photovoltaics via a dual-additive strategy for 20.5% efficiency

Energy & Environmental Science, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

The dual-additive strategy forms balanced crystallization and phase separation, with a record efficiency of 20.52% (certified 19.92%) achieved.

Language: Английский

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Efficient and Photostable Organic Solar Cells Achieved by Alloyed Dimer Acceptors with Tailored Linker Structures

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

Published: June 27, 2024

Abstract High power conversion efficiency (PCE) and long‐term stability are prerequisites for commercialization of organic solar cells (OSCs). Herein, two dimer acceptors (DYTVT DYTCVT) developed with different properties through linker engineering, study their effects as alloy‐like on the photovoltaic performance photostability OSCs. These ternary OSCs effectively combine advantages both acceptors. DYTVT, characterized by its high backbone planarity, ensures elevated electron mobility glass‐transition temperature ( T g ), leading to efficient charge transport enhanced Conversely, DYTCVT, significant dipole moment electrostatic potential, enhances compatibility alloy donors refines blend morphology, facilitating generation in Consequently, D18:DYTVT:DYTCVT exhibit higher PCE (18.4%) compared D18:MYT (monomer acceptor, = 16.5%), D18:DYTVT (PCE 17.4%), D18:DYTCVT 17.0%) Furthermore, owing (133 °C) than MYT 80 DYTCVT 120 °C), have significantly t 80% lifetime 4250 h under 1‐sun illumination) 40 h) 2910 h).

Language: Английский

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“Double‐Gene” Small Molecule as Guest Component Promotes the Efficiency of Organic Solar Cells Beyond 19.5%

Angewandte Chemie International Edition, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 3, 2025

Abstract Introduction of a guest component into the active layer is simple yet effective approach to enhance performance organic solar cells (OSCs). Despite various components successfully employed in OSCs, efficient require deliberate design and ingenious inspiration, which still remains big challenge for developing high OSCs. In this work, we propose concept “structural gene” engineering create new “double‐gene” small molecule (L‐DBDD) by simply combining structures both donor PM6 acceptor L8‐BO. L‐DBDD inherit features acceptor, naturally acts as bridge between donor/acceptor (D/A) interfaces strengthen D/A interactions compatibility. Incorporation can facilitate rapid charge dissociation simultaneously optimize molecular packing transport. Consequently, ternary OSC based on : L8‐BO blend achieves top power conversion efficiency (PCE) 19.51 %, significantly suppressing binary control device (PCE=18.52 %). These results demonstrate that combination provides meaningful guideline component‐assisted highly

Language: Английский

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19.5% Efficiency organic solar cells enabled by a direct C–H arylation-derived wide-bandgap small-molecule guest donor

Energy & Environmental Science, Journal Year: 2024, Volume and Issue: 17(20), P. 7803 - 7815

Published: Jan. 1, 2024

A tin-free asymmetric small-molecule guest donor ( o PhFO) with a wide bandgap allows PM6: PhFO:BTP-ec9 ternary OSCs to reach champion efficiency of 19.5% by optimizing blend morphology and vertical phase separation as well reducing energy loss.

Language: Английский

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Electron-Transporting Polymer with Perfluoroalkyl Spacer Enables Efficient and Stable Non-Fullerene Organic Solar Cells

Macromolecules, Journal Year: 2024, Volume and Issue: 57(17), P. 8374 - 8382

Published: Aug. 29, 2024

To achieve efficient and stable organic solar cells (OSCs), interfacial dipole suitable wettability are prerequisites for interlayer materials, in addition to the aligned energy level high conductivity. However, these have been rarely realized simultaneously electron-transporting layer (ETL) materials date. Herein, an polymer, PPDIN-C6-F, by integrating perylene diimide (PDI) segment fluorinated alkyl spacer (C6F12) was synthesized via a cost-effective quaternization polymerization reaction. Compared control PPDIN-C6-H, with C6H12 spacer, PPDIN-C6-F shows exceptional capabilities film formation, self-doping, electrical When used as ETL OSCs, decreased barrier minimized defects can be obtained. Consequently, demonstrated superior device performance, delivering remarkable power conversion efficiency (PCE) up 18.68% PM6:L8-BO-based OSCs. Notably, OSCs based on display excellent storage thermal stability 91% 79% of initial PCEs maintained after aged 1000 600 h, respectively, which decayed 84% 59% those PPDIN-C6-H ETL. Furthermore, its versatility is highlighted various photoactive layers, PCE 19.20% provided ternary PM6:SD-EDOT:L8-BO system.

Language: Английский

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CF₃-Functionalized Side Chains in Nonfullerene Acceptors Promote Electrostatic Interactions for Highly Efficient Organic Solar Cells

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 18, 2024

The advent of next-generation nonfullerene acceptors (NFAs) has propelled major advances in organic solar cells (OSCs). Here we report an NFA design incorporating CF

Language: Английский

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