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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Advances in organic solar cells: Materials, progress, challenges and amelioration for sustainable future

Sustainable Energy Technologies and Assessments, Год журнала: 2024, Номер 63, С. 103632 - 103632

Опубликована: Фев. 14, 2024

Язык: Английский

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An Efficient and Stable Inverted Structure Organic Solar Cell Using ZnO Modified by 2D ZrSe₂ as a Composite Electron Transport Layer

Advanced Functional Materials, Год журнала: 2024, Номер 34(37)

Опубликована: Апрель 10, 2024

Abstract As an electron transport layer (ETL) widely used in organic solar cells (OSCs), ZnO has problems with energy level mismatch the active and excessive defects on surface, which can reduce efficiency of OSCs. Here, ZnO/ZrSe 2 composite is fabricated by modifying 2D ZrSe . The XPS first‐principles calculation (FPC) show that obtains electrons from forms interfacial dipoles toward layer, decreases work function ZnO, thus reducing interface barrier favoring collection At same time, after modification, oxygen vacancy density surface decreases, improving conductivity ZnO. More importantly, femtosecond transient absorption (Fs‐TA) shows selectively traps holes prevents entering thereby probability recombination. Finally, as a novel ETL OSCs PBDB‐T: ITIC, PM6:Y6 PM6: L8‐BO layers, obtaining 12.09%, 16.34%, 18.24% efficiency, respectively. This study provides method for modification further investigates role nanosheets modification.

Язык: Английский

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High-Efficiency Ternary Polymer Solar Cells with a Gradient-Blended Structure Fabricated by Sequential Deposition

ACS Applied Materials & Interfaces, Год журнала: 2024, Номер 16(12), С. 15121 - 15132

Опубликована: Март 19, 2024

Acquiring the ideal blend morphology of active layer to optimize charge separation and collection is a constant goal polymer solar cells (PSCs). In this paper, ternary strategy sequential deposition process were combined make sufficient use spectrum, energy-level structure, regulate vertical phase morphology, ultimately enhance power conversion efficiency (PCE) stability PSCs. Specifically, donor acceptor illustrated gradient-blended distribution in deposition-processed films, thus resulting facilitated carrier characteristics devices. Consequently, PSCs based on D18-Cl/Y6:ZY-4Cl have achieved device over 18% with synergetic improvement open-circuit voltage (VOC), short-circuit current density (JSC), fill factor (FF). Therefore, work reveals facile approach fabricating improved performance stability.

Язык: Английский

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How can we improve the stability of organic solar cells from materials design to device engineering?

Aggregate, Год журнала: 2024, Номер 5(5)

Опубликована: Апрель 22, 2024

Abstract Among a promising photovoltaic technology for solar energy conversion, organic cells (OSCs) have been paid much attention, of which the power conversion efficiencies (PCEs) rapidly surpassed over 20%, approaching threshold potential applications. However, device stability OSCs including storage stability, photostability and thermal remains to be an enormous challenge when faced with practical The major causes instability are rooted in poor inherent properties light‐harvesting materials, metastable morphology, interfacial reactions highly sensitive external stresses. To get rid these flaws, comprehensive review is provided about recent strategies methods improving from active layers, engineering encapsulation techniques high‐performance OSC devices. In end, prospectives next stage development devices satisfactory long‐term afforded community.

Язык: Английский

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Sensitive SWIR Organic Photodetectors with Spectral Response Reaching 1.5 µm

Advanced Materials, Год журнала: 2024, Номер 36(41)

Опубликована: Авг. 17, 2024

Abstract The performance of organic photodetectors (OPDs) sensitive to the short‐wavelength infrared (SWIR) light lags behind commercial indium gallium arsenide (InGaAs) primarily due scarcity semiconductors with efficient photoelectric responses exceeding 1.3 µm. Limited by Energy‐gap law, ultralow‐bandgap usually suffer from severe non‐radiative transitions, resulting in low external quantum efficiency (EQE). Herein, a difluoro‐substituted quinoid terminal group (QC‐2F) exceptionally strong electron‐negativity is developed for constructing new non‐fullerene acceptor (NFA), Y‐QC4F an ultralow bandgap 0.83 eV. This subtle structural modification significantly enhances intermolecular packing order and density, enabling absorption onset up 1.5 µm while suppressing non‐radiation recombination films. SWIR OPDs based on achieve impressive detectivity ( D *) over 10 11 Jones 0.4 under 0 V bias, maximum 1.68 × 12 at 1.16 Furthermore, demonstrate competitive high‐quality imaging even 1.4 irradiation.

Язык: Английский

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Recent development in solid additives enables high-performance organic solar cells

EnergyChem, Год журнала: 2024, Номер 6(4), С. 100129 - 100129

Опубликована: Июнь 15, 2024

Язык: Английский

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In‐Situ Removable Solid Additive Optimizing Active Layer and Cathode Interlayer of Organic Solar Cells

Advanced Energy Materials, Год журнала: 2024, Номер 14(40)

Опубликована: Июль 21, 2024

Abstract In situ removable (ISR) solid additive can employ cold sublimation process to optimize active layer morphology for organic solar cells (OSCs), thus remaining unique potential. Herein, a feasible guideline is proposed discover new ISR 1‐bromo‐4‐chlorobenzene (CBB), whose removing time ( T R ) between those of reported additives 1,4‐dichlorobenzene (DCB) and 1‐chloro‐4‐iodobenzene (CIB). The CBB with moderate beneficial affording the optimal achieving highest power conversion efficiency (PCE) 18.58% D18:L8‐BO binary layer, as supported by most efficient exciton splitting, fastest transfer, balanced carrier transports. Due ability, DCB, CBB, CIB are further aggregation PDINN cathode interlayer. Particularly, CBB‐ CIB‐treated interlayers afforded based OSCs excellent PCEs 19.38% 19.26%, along remarkable fill factors 80.98% 81.37%, respectively. suppress non‐radiative recombination devices, resulting in higher open‐circuit voltage. This work not only provides an effective approach flourish but also expands application OSCs.

Язык: Английский

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Small molecule donor third component incorporating thieno[3,2-b]thiophene unit enables 19.18% efficiency ternary organic solar cells with improved operational stability

Nano Energy, Год журнала: 2024, Номер 125, С. 109542 - 109542

Опубликована: Март 24, 2024

Язык: Английский

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