Predicting power conversion efficiency of binary organic solar cells based on Y6 acceptor by machine learning

Journal of Energy Chemistry, Год журнала: 2023, Номер 82, С. 139 - 147

Опубликована: Апрель 1, 2023

Язык: Английский

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All-small-molecule efficient ternary organic solar cells employing a coumarin donor and two fullerene-free acceptors

Journal of Materials Chemistry C, Год журнала: 2023, Номер 11(5), С. 1919 - 1926

Опубликована: Янв. 1, 2023

A ternary organic solar cell composed of two fullerene-free acceptors and a coumarin donor attained appropriate nano-scale phase separation, achieving PCE 15.54%.

Язык: Английский

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A new BODIPY dimer containing carbazole group as a small molecule donor for ternary organic solar cells with the PCE up to 14.97%

Dyes and Pigments, Год журнала: 2023, Номер 215, С. 111297 - 111297

Опубликована: Апрель 10, 2023

Язык: Английский

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Achieving High‐Efficiency in Binary Organic Solar Cells by the Structural Fine‐Tuning of Coumarin‐Based Donor

Solar RRL, Год журнала: 2023, Номер 7(10)

Опубликована: Март 2, 2023

The choice of molecular material plays a crucial role in improving the performance organic solar cells. Herein, two coumarin‐based small molecules are designed and synthesized which π‐system is extended by introduction double bonds. differed attachment central acceptor units. replacement carbonyl group C3 dicyanomethylene unit C3–CN red‐shift absorption, reduced energy gap, stabilized highest occupied orbital lowest unoccupied levels. When blended with complementary absorbing all‐fused F13, binary devices using donor delivered power conversion efficiency (PCE) 11.09%. In contrast, C3–CN:F13‐based device displayed an impressive PCE 14.84% due to obvious increase all open circuit voltage, short current density, fill factor values. inclusion CN backbone induces tighter intermolecular packing, beneficial for charge transport properties. study demonstrates that subtle modification conjugation length tuning level proper could be promising way improve device's performance.

Язык: Английский

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An Asymmetric Coumarin‐Anthracene Conjugate as Efficient Fullerene‐Free Acceptor for Organic Solar Cells

Angewandte Chemie International Edition, Год журнала: 2024, Номер unknown

Опубликована: Май 13, 2024

Asymmetric wide-band gap fullerene-free acceptors (FFAs) play a crucial role in organic solar cells (OSCs). Here, we designed and synthesized simple asymmetric coumarin-anthracene conjugate named CA-CN with optical band of 2.1 eV single-step condensation reaction. Single crystal X-ray structure analysis confirms various multiple intermolecular non-covalent interactions. The molecular orbital energy levels estimated from cyclic voltammetry were found to be suitable for its use as an acceptor OSCs. Binary OSCs fabricated using PTB7-Th the donor achieve power conversion efficiency (PCE) 11.13 %. We further demonstrate that insertion 20 wt % third component ternary : DICTF host material achieved impressive PCE 14.91 %, improvement ~43 compared binary device (10.38 %). Importantly, blend enhances absorption coverage 400 800 nm improves morphology active layer. findings highlight efficacy design approach FFAs, which paves way developing high-efficiency at low cost.

Язык: Английский

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Efficient All-Small-Molecule Organic Solar Cells Based on an Asymmetric Coumarin-Anthracene Donor

ACS Applied Energy Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 12, 2025

Язык: Английский

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Tetracyanobutadiene- and dicyanoquinodimethane-functionalized D′-A-(π)-D-(π)-A-D′ type indacenodithiophene small-molecule chromophores: Synthesis, optoelectronic properties and photovoltaic response

Journal of Photochemistry and Photobiology A Chemistry, Год журнала: 2025, Номер unknown, С. 116376 - 116376

Опубликована: Март 1, 2025

Язык: Английский

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Diketopyrrolopyrrole-Coumarin Conjugates for Efficient Binary Organic Solar Cells

ACS Applied Energy Materials, Год журнала: 2023, Номер 6(17), С. 8857 - 8866

Опубликована: Авг. 18, 2023

Two coumarin (Cou)-functionalized DPP derivatives, DPP-Cou and Cou-DPP-Cou, have been designed, synthesized, characterized. The extension of the molecular backbone by an additional derivative in symmetrical Cou-DPP-Cou extends absorption to ∼750 nm (Egopt = 1.67 eV) compared ∼700 1.78 for asymmetric DPP-Cou. Thermogravimetric analysis showed higher thermal stability conjugates one. Both materials complementary spectra well-matched Frontier orbital energy levels with low band gap fullerene-free acceptor Y7 used as a donor organic solar cells. After optimization using solvent vapor annealing treatment, cells based on DPP-Cou:Y7 Cou-DPP-Cou:Y7 attained overall power conversion efficiencies (PCE) 9.63 13.48%, respectively. improved PCE is mainly due appropriate morphology faster charge extraction lower recombination.

Язык: Английский

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Molecular Screening of Different π-Linker-Based Organic Dyes for Optoelectronic Applications: Quantum Chemical Study

Journal of Electronic Materials, Год журнала: 2023, Номер 52(6), С. 3774 - 3785

Опубликована: Март 25, 2023

Язык: Английский

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Correlation of Functional Coumarin Dye Structure with Molecular Packing and Organic Solar Cells Performance

Solar RRL, Год журнала: 2023, Номер 7(21)

Опубликована: Авг. 28, 2023

Nowadays, ternary organic solar cells (OSCs) based on all‐small molecules have the convenient strategy toward high‐performance and stable devices. Herein, two coumarin‐based dyes C4 C4–CN are designed synthesized with a simple synthetic route. The display different intra‐ intermolecular interactions in solid state originating from acceptor substitution, as revealed by single‐crystal structure analysis. introduction of dicyanomethylene group plays synergistic role molecular packing orientation state, thus fostering elongation exciton lifetime improved charge transport photoactive layer. optimized C4–CN:AQ x –3‐based binary OSCs show power conversion efficiency (PCE) 15.07%, which is appreciably higher than C4:AQ OSC (11.39%) due to appropriate energy‐level alignment, balanced transport, favorable phase separation, lower recombination. Furthermore, third component into –3 blend, shows an PCE 15.34%, linked enhanced crystallization, morphology, carrier mobility, suppressed recombination low energy loss.

Язык: Английский

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