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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Effect of the Number of Phenylcarbazole Units Adorned to the Silicon Atom for High Triplet Energy with High Charge Mobility

Molecules, Journal Year: 2025, Volume and Issue: 30(3), P. 454 - 454

Published: Jan. 21, 2025

Increasing the number of phenylcarbazole (PC) units attached to silicon atom in organic solid-state thin films led a remarkable enhancement charge mobility. Specifically, mobility values exhibited an increase from 1.32 × 10−4 cm2/Vs for 3PCBP 4.39 10–4 2MCBP, ultimately reaching 1.16 10–3 MCBP. Notably, these enhancements were achieved while maintaining high triplet energy 3.01 eV. DFT calculations on spin density distribution provided insights into nature improved preserving energy. The accuracy was validated by comparing results with experimental data photoemission spectroscopy (PES). Mobility measurements, as contemplated DFT, allowed comprehensive understanding factors influencing enhanced keeping constant. This study suggested that intramolecular transfers played crucial role reducing reorganization energy, showing inverse dependence PCs. Consequently, it inferred manipulation PC could effectively optimize transfer mechanisms, offering promising avenue tailoring electronic properties.

Language: Английский

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Deuteration solid additive strategy for high-performance and thermally robust organic solar cells

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 162655 - 162655

Published: April 1, 2025

Language: Английский

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Tetradentate Platinum(II) Complex with a 6/5/7 Metallocycle

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

Published: Jan. 15, 2025

Tetradentate Pt(II) complexes are promising phosphorescent materials for photocatalysts and solar cells, especially as robust emitters sensitizers in organic light-emitting diodes (OLEDs). In this work, we report a tetradentate complex, PtZL7, which utilizes conjugately linked ligand of phenylquinoline/benzimidazole/phenoxy anion to form novel 6/5/7 metallocycle. To the best our knowledge, PtZL7 is rare example complex containing fused The molecular geometry photophysical excited-state properties were systematically investigated through experimental theoretical studies. has highly distorted limits intermolecular interactions. exhibited red region emission with peak wavelengths at 617 607 nm fwhm values 125 115 room temperature (RT) toluene poly(methyl methacrylate) (PMMA) film, respectively, high quantum efficiency 62% PMMA film. According time-dependent density functional theory (TD-DFT) NTO analyses, there mixed 3MLCT 3ILCT transition T1 state RT, responsible broader spectra.

Language: Английский

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