Impact of Linking‐Site on Photovoltaic Performance of Giant Molecular Acceptors Containing N‐Type Linker

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 11, 2025

Abstract Connecting small molecule acceptors through conjugated or nonconjugated linker to form giant molecular (GMAs) represents a strategic approach enhancing the morphological stability of organic solar cells (OSCs). In this study, we employed benzothiadiazole (BT) as typical n ‐type design and synthesize two GMAs linking‐site isomerization: i‐BT‐DY o‐BT‐DY. Compared i‐BT‐DY, o‐BT‐DY exhibits enhanced crystallinity more favorable face‐on orientation but lower electron mobility. This can be well explained by theoretical calculations, demonstrates delocalized LUMO distribution significantly stronger intramolecular super‐exchange coupling (43.7 meV versus 22.2 for o‐BT‐DY). Additionally, also red‐shifted absorption. Combining these attributes, PM6: blend achieved an impressive power conversion efficiency (PCE) 18.86%. The PCE further increased 19.49% in ternary blend. As expected, OSCs based on both exhibit exceptional long‐term photostability (T85% >1000 hours). work deepens our understanding how linkers at different linking sites influence performance GMAs, concluding that interaction, rather than intermolecular, are primary factor affecting charge transport acceptors. it highlights potential components OSCs.

Язык: Английский

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Photovoltaic performances and morphological adjustment of A-π-D'AD-π-A electron-acceptors with twisted backbone

Journal of Molecular Structure, Год журнала: 2025, Номер unknown, С. 142252 - 142252

Опубликована: Март 1, 2025

Язык: Английский

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Rational halogenation on aromatic-core of tethered small molecule acceptors for high-performance polymer solar cells

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 162657 - 162657

Опубликована: Апрель 1, 2025

Язык: Английский

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Highly Planar Tetramer Acceptor Constructed by Vinyl Linkage Enables Organic Solar Cells with Outstanding Efficiency

Chemistry of Materials, Год журнала: 2025, Номер unknown

Опубликована: Апрель 28, 2025

Язык: Английский

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O, S, and N Bridged Atoms Screening on 2D Conjugated Central Units of High‐Performance Acceptors

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Май 6, 2025

Abstract Almost all of central cores in high‐performance acceptors are limited to the electron‐withdrawing diimide structure currently, which constrains further acceptor structural innovation greatly. Herein, oxygen (O), sulfur (S), and nitrogen (N) atoms adopted bridge 2D conjugated cores, yielding three platforms CH─O, CH─S, CH─N that differ by only two atoms. Because characteristic atomic outer electron configuration hybrid orbital orientation, O‐, S‐, N‐bridged display quite different conformations electronic properties, namely, dibenzodioxin (planar, non‐aromatic), thianthrene (puckered, non‐aromatic) phenazine aromatic), respectively. A systematic investigation discloses how core, especially its p‐π overlap between lone pair on O/S/N coterminous benzene planes, affect intrinsic photoelectronic properties for first time. Finally, CH─N‐based binary device affords highest fill factor 83.13% organic photovoltaics along with a first‐class efficiency 20.23%. By evaluating strictly controlled molecular comprehensively, work reveals potential uniqueness determining excellent photovoltaic outcomes acceptors.

Язык: Английский

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Organic solar cells: beyond 20%

Science China Materials, Год журнала: 2025, Номер unknown

Опубликована: Апрель 30, 2025

Язык: Английский

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Non‐Halogenated Solvent Processed Ternary All‐Polymer Solar Cell with PCE of 18.55% Enabled by Two Compatible Polymer Acceptors^†

Chinese Journal of Chemistry, Год журнала: 2025, Номер unknown

Опубликована: Май 29, 2025

Comprehensive Summary Herein, a theory‐guided ternary construction case on boosting power conversion efficiency (PCE) for all‐polymer solar cell (all‐PSC) is reported, where guest acceptor's characteristics include high miscibility with host polymer acceptor, significantly larger optical bandgap, and improved luminescence. Consequently, only 10 wt% PFFO‐Th (third component) addition, the PCE of binary control promoted to 18.55% from 16.69%, 11.1% relative increase, demonstrating great effectiveness this strategy. Besides, realized at state‐of‐the‐art level all‐PSCs processed by ortho ‐xylene, widely acknowledged green non‐ halogenated solvent field. This study shares new thought designing high‐performance photovoltaic devices reduced energy losses favorable charge dynamics, which would nourish future development all‐PSCs, even other organic electronics.

Язык: Английский

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Mesogenic Unit based Low Melting Point Solid Additive for Efficient and Stable Organic Solar Cells

Journal of Materials Chemistry C, Год журнала: 2024, Номер 13(5), С. 2183 - 2189

Опубликована: Дек. 3, 2024

In this work, a novel low melting temperature solid additive CB8-Br was designed and synthesized through simple reliable method, superior PCE of 18.12% with excellent device stability obtained in CB8-Br-processed devices.

Язык: Английский

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