Cyano-functionalized pyrazine: an electron-deficient unit as a solid additive enables binary organic solar cells with 19.67% efficiency

Energy & Environmental Science, Год журнала: 2024, Номер 17(10), С. 3365 - 3374

Опубликована: Янв. 1, 2024

A strong electron-deficient unit CNPz as a solid additive was developed in PTQ10/ m -BTP-PhC6 binary organic solar cells. high PCE of 19.67% achieved with significant increase the J SC and FF (81.8%).

Язык: Английский

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Isomerization Engineering of Solid Additives Enables Highly Efficient Organic Solar Cells via Manipulating Molecular Stacking and Aggregation of Active Layer

Advanced Materials, Год журнала: 2024, Номер 36(33)

Опубликована: Июнь 20, 2024

Morphology control is crucial in achieving high-performance organic solar cells (OSCs) and remains a major challenge the field of OSC. Solid additive an effective strategy to fine-tune morphology, however, mechanism underlying isomeric solid additives on blend morphology OSC performance still vague urgently requires further investigation. Herein, two based pyridazine or pyrimidine as core units, M1 M2, are designed synthesized explore working OSCs. The smaller steric hindrance larger dipole moment facilitate better π-π stacking aggregation M1-based active layer. M1-treated all-small-molecule OSCs (ASM OSCs) obtain impressive efficiency 17.57%, ranking among highest values for binary ASM OSCs, with 16.70% M2-treated counterparts. Moreover, it imperative investigate whether isomerization engineering works state-of-the-art polymer D18-Cl:PM6:L8-BO-based devices achieve exceptional 19.70% (certified 19.34%), work provides deep insights into design clarifies potential optimizing device through additives.

Язык: Английский

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Recent Progress of Solution‐Processed Thickness‐Insensitive Cathode Interlayers for High‐Performance Organic Solar Cells

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 5, 2025

Abstract Organic solar cells (OSCs) have shown great applications potential in flexible/wearable electronics, indoor photovoltaics and so on. The efficiencies of single‐junction OSCs exceeded 19%, making the commercialization brighter. Large‐area printing fabrication is a key way to OSCs, solution‐processed thickness‐insensitive cathode interlayers (CILs) are urgently needed for large‐area fabrication. High electron mobility interfacial materials (CIMs) critical enable CILs. N‐type self‐doped characteristics can endow organic CIMs with high mobility. Different type n‐type show different applicability conventional inverted OSCs. External dopants further increase hybrid blends. Particularly, ZnO doped dyes achieve superior photoconductivity This review focuses on CILs high‐performance In small molecules polymers, external n‐doped blends as summarized. small‐molecular electrolytes polyelectrolytes, PEI‐/PEIE‐based (including organic‐organic ZnO‐organic) summarized relationships between particular functions chemical structures highlighted. Finally, summary outlook provided.

Язык: Английский

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19.36% Efficiency Organic Solar Cells Based on Low‐Cost Terpolymer Donors with Simple Molecular Structures

Advanced Functional Materials, Год журнала: 2024, Номер 34(44)

Опубликована: Май 19, 2024

Abstract Low cost and high performance are key elements for the industrialization of organic solar cells (OSCs). In view this, developing highly‐efficient photovoltaic molecules with simple chemical structure is one most effective countermeasures. Herein, three simple‐structure terpolymers PTQ12‐5, PTQ12‐10, PTQ12‐15 designed synthesized, by embedding difluoro‐substituted bithiophene (2T‐2F) unit into backbone low‐cost high‐efficiency polymer PTQ10. The synthesis contains only two‐step synthetic routes over 85% yields from cheap raw compounds, thus exhibiting distinctly characteristic. Remarkably, PTQ12‐5 shows significantly higher absorbance coefficient hole mobility than Consequently, PTQ12‐5‐based OSCs more efficient exciton dissociation charge transfer, suppressed carrier recombination, tighter molecular π‐π stacking, faster balanced transport, demonstrates a improved efficiency 18.77% that PTQ10‐based device (18.03%). Moreover, an outstanding 19.36% achieved in ternary further modulating energy level alignment blending features photoactive molecules, which highest based on polymers to date. This work has significant implications guiding design high‐performance materials.

Язык: Английский

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Conjugated π-Extension of Small Molecular Nonfullerene Acceptor for Efficient Ternary Organic Solar Cells with an Efficiency of 19.10%

Energy & Fuels, Год журнала: 2025, Номер unknown

Опубликована: Фев. 14, 2025

In this study, we have successfully incorporated a small molecular acceptor, Y-LC, with conjugated π-extension as secondary acceptor in the PM6:BTP-eC9-based organic photovoltaics. The performance of device was significantly promoted from 18.45% binary system PM6:BTP-eC9 to over 19% ternary minimal Y-LC loading. This enhancement can be attributed alloy-like structures acceptors and optimized active layer morphology, which leads improved hole electron mobilities, thereby suppressing charge recombination, finally resulting higher photocurrent solar cells. Furthermore, complementary absorption is observed PM6 BTP-eC9, broaden spectrum photoactive enable more photons sunlight absorbed. Additionally, facilitates efficient transfer donor by forming cascade energy levels between BTP-eC9. These advantages collectively contribute superior obtained work also highlights that adoption nonfullerene suitable π-extensions minor additive photovoltaics powerful approach for achieving state-of-the-art

Язык: Английский

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Designer Conjugation-Break Spacer That Boosts Charge Transport in Semiconducting Terpolymers

Macromolecules, Год журнала: 2024, Номер 57(12), С. 5902 - 5914

Опубликована: Июнь 5, 2024

Conjugated polymers (CPs) are pivotal for high-mobility applications, typically avoiding nonconjugated units due to their perceived negative impact on charge transport. Contrary this belief, our study introduces a unit, DKPDO, which when employed as conjugation-break spacer (CBS), significantly enhances DKPDO was obtained center-modified isoindigo variant featuring strongly electron-withdrawing amide groups that diminish the electron density and foster multiple hydrogen-bonding interactions. This results in enhanced deficiency reinforced coplanarity relative isoindigo. incorporated into polymer backbone, comprising bithiophene, create series of terpolymers with varied molar ratios, allowing systematic evaluation solubilities, interchain interactions, crystallinities, energy levels. Notably, incorporating universal improvement hole mobilities operational stabilities over DKPDO-free counterpart. Remarkably, terpolymer containing 2.5% achieves high mobility 4.12 cm2 V–1 s–1, approximately 6-fold higher than parent CP among highest CPs based center-inserted units. The not only, first time, realizes transport enhancement CBS backbones but also sets precedent strategic use developing high-performing CPs.

Язык: Английский

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Enhanced charge collection of AgNWs-based top electrode to realize high-performance, all-solution processed organic solar cells

Science China Chemistry, Год журнала: 2024, Номер 67(10), С. 3347 - 3356

Опубликована: Авг. 13, 2024

Язык: Английский

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Organic solar cells with D18 or derivatives offer efficiency over 19%

Journal of Semiconductors, Год журнала: 2024, Номер 45(5), С. 050201 - 050201

Опубликована: Май 1, 2024

Язык: Английский

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N-type small molecule electrolyte cathode interface layer with thickness insensitivity for organic solar cells

Nano Energy, Год журнала: 2024, Номер 128, С. 109890 - 109890

Опубликована: Июнь 14, 2024

Язык: Английский

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Multiscale computational analysis of the effect of end group modification on PM6:BTP-x OSCs performance

Journal of Materials Chemistry C, Год журнала: 2024, Номер 12(34), С. 13311 - 13324

Опубликована: Янв. 1, 2024

Theoretical computational simulation are used to analyse the molecular stacking characteristics of PM6:BTP- x OSCs and role end group modifications.

Язык: Английский

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