Impact of Electrostatic Interaction on Vertical Morphology and Energy Loss in Efficient Pseudo‐Planar Heterojunction Organic Solar Cells

Advanced Materials, Год журнала: 2024, Номер 36(18)

Опубликована: Янв. 27, 2024

Abstract Although a suitable vertical phase separation (VPS) morphology is essential for improving charge transport efficiency, reducing recombination, and ultimately boosting the efficiency of organic solar cells (OSCs), there lack theoretical guidance on how to achieve ideal morphology. Herein, relationship between molecular structure VPS pseudo‐planar heterojunction (PPHJ) OSCs established by using surface electrostatic potential (ESP) as bridge. The morphological evolution mechanism revealed studying four binary systems with vary difference (∆ESP) donors (Ds) acceptors (As). findings manifest that ∆ESP increases, active layer more likely form well‐mixed phase, while smaller favors Interestingly, it also observed larger leads enhanced miscibility Ds As, resulting in higher non‐radiative energy losses (ΔE 3 ). Based these discoveries, ternary PPHJ device meticulously designed an appropriate obtain better lower ΔE , impressive 19.09% achieved. This work demonstrates optimizing ΔESP, not only formation can be controlled, but reduced, paving way further boost OSC performance.

Язык: Английский

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Understanding photochemical degradation mechanisms in photoactive layer materials for organic solar cells

Chemical Society Reviews, Год журнала: 2024, Номер 53(14), С. 7426 - 7454

Опубликована: Янв. 1, 2024

Over the past decades, field of organic solar cells (OSCs) has witnessed a significant evolution in materials chemistry, which resulted remarkable enhancement device performance, achieving efficiencies over 19%. The photoactive layer OSCs play crucial role light absorption, charge generation, transport and stability. To facilitate scale-up OSCs, it is imperative to address photostability these electron acceptor donor materials, as their photochemical degradation process remains challenge during photo-to-electric conversion. In this review, we present an overview development emphasizing aspects chemical stability behavior that are linked OSCs. Throughout each section, highlight pathways for link degradation. We also discuss existing interdisciplinary challenges obstacles impede photostable materials. Finally, offer insights into strategies aimed at enhancing future directions developing photo-active layers, facilitating commercialization

Язык: Английский

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Computational analysis of MOF-functionalized polymeric membranes for wastewater treatment and applications

Journal of Molecular Liquids, Год журнала: 2024, Номер 405, С. 125013 - 125013

Опубликована: Май 15, 2024

Язык: Английский

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Achieving 19.72% Efficiency in Ternary Organic Solar Cells through Electrostatic Potential‐Driven Morphology Control

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Окт. 9, 2024

Abstract The ternary strategy has proven effective in enhancing the performance of organic solar cells (OSCs), yet identifying optimal third component remains a challenge due to lack theoretical frameworks for predicting its impact based on molecular structure. This study addresses this by proposing quantitative parameters derived from surface electrostatic potential (ESP) as criteria selecting components. asymmetric acceptor BTP‐OS, which exhibits lower total average ESP and larger polarization index relative host acceptor, is introduced into PM6:L8‐BO system. incorporation led weakened ESP‐induced intermolecular interactions reduce miscibility with donor polymer, resulting an optimized multi‐scale morphology blend. Consequently, device achieved efficiency 19.72%, one highest values PM6:L8‐BO‐based devices, enhanced exciton dissociation charge collection, energy disorder, minimized non‐radiative losses. Comparable improvements are also verified PM6:BTP‐eC9 D18:N3 systems, demonstrating broad applicability proposed approach. not only provides practical principle components but establishes broader framework optimizing OSCs, potentially advancing development more efficient OSCs across diverse material systems.

Язык: Английский

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Thickness Insensitive UV Blocking Layer Meliorating Carrier Extraction and Deep Trap towards Stable Organic Solar Cells

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 17, 2025

Abstract The photostability of organic solar cells (OSCs) is extremely crucial to their commercial application. Herein, double‐layered anode interface layer (DL‐AIL) with ultraviolet (UV) absorber BP2 constructed by layer‐by‐layer processing simultaneously improve power‐conversion efficiencies (PCEs) and OSCs. DL‐AIL exhibits good UV absorbance photon utilization due the effective Förster energy transfer from polymer donor. High electric conductivity, optimal work function, improved surface roughness can be obtained as well. based devices also achieve higher PCEs excellent thickness insensitivity, attributed remarkable increase on conductivity reduced transport resistance. More intriguingly, even under irradiation in air xenon lamp band, an extrapolated T 80 lifetime device 85 nm thick reach 1306 h, which approximately 54 times that PEDOT:PSS device. Furthermore, degradation mechanism OSCs different AIL revealed transient charge extraction, capacitance‐voltage capacitance‐frequency. incorporation delivers carrier density constrained deep trap aged devices. Consequently, this new finding demonstrates strategy promote efficiency long‐term stability

Язык: Английский

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“Double‐Gene” Small Molecule as Guest Component Promotes the Efficiency of Organic Solar Cells Beyond 19.5%

Angewandte Chemie International Edition, Год журнала: 2025, Номер unknown

Опубликована: Янв. 3, 2025

Abstract Introduction of a guest component into the active layer is simple yet effective approach to enhance performance organic solar cells (OSCs). Despite various components successfully employed in OSCs, efficient require deliberate design and ingenious inspiration, which still remains big challenge for developing high OSCs. In this work, we propose concept “structural gene” engineering create new “double‐gene” small molecule (L‐DBDD) by simply combining structures both donor PM6 acceptor L8‐BO. L‐DBDD inherit features acceptor, naturally acts as bridge between donor/acceptor (D/A) interfaces strengthen D/A interactions compatibility. Incorporation can facilitate rapid charge dissociation simultaneously optimize molecular packing transport. Consequently, ternary OSC based on : L8‐BO blend achieves top power conversion efficiency (PCE) 19.51 %, significantly suppressing binary control device (PCE=18.52 %). These results demonstrate that combination provides meaningful guideline component‐assisted highly

Язык: Английский

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Preparation of Dual-Asymmetric Acceptors via Selenium Substitution Combined with Terminal Group Optimization Strategy for High Efficiency Organic Solar Cells

Journal of the American Chemical Society, Год журнала: 2025, Номер unknown

Опубликована: Фев. 25, 2025

Improving both the open-circuit voltage (VOC) and short-circuit current density (JSC) through development of photovoltaic materials to achieve high power conversion efficiency (PCE) is critical a significant challenge for organic solar cells (OSCs). Here, we designed novel dual-asymmetric acceptors A-SSe-TCF A-SSe-LSF by simultaneously asymmetrically regulating backbone terminal groups investigated their synergistic effects on performance in comparison with monoasymmetric acceptor A-SSe-4F. The exhibit broader spectral absorption larger half-molecule dipole moment differences, which favored enhancement JSC reduction energy loss (Eloss). Among binary blends, PM6:A-SSe-TCF exhibits superior phase separation, vertical distribution morphology, more ordered π-π stacking compared PM6:A-SSe-LSF PM6:A-SSe-4F. As result, OSCs based achieved higher PCE 18.53% VOC due suppressed nonradiative recombination enhanced charge extraction capabilities. Furthermore, incorporating as third component, PM6:L8-BO:A-SSe-TCF-based device achieves champion 19.73% without account decrement Eloss. strategy provides new insights into molecular design improvement OSCs.

Язык: Английский

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Enhancing Ultraviolet Stability and Performance of Wide Bandgap Perovskite Solar Cells Through Ultraviolet Light‐Absorbing Passivator

Small Methods, Год журнала: 2024, Номер unknown

Опубликована: Март 19, 2024

Abstract Ultraviolet light (UV) has caused tremendous damage to perovskite solar cells (PSCs), degrading the and shortening their lifetime. Defects act as non‐radiative recombination sites, accelerate degradation process, reduce efficiency of device weaken stability cell. In this work, realize efficient stable p–i–n wide bandgap under UV, a synergetic strategy utilizing UV light‐absorbing passivator, (Trifluoroacetyl) benzotriazole (TFABI), enhance photostability regulate defect passivation is proposed. By using TFABI, absorption layer suppressed, spectral response enhanced Pb vacancy defects are passivated. As result, target achieves an 21.54%, exhibiting excellent long‐term 365 nm irradiation. After 60 h irradiation, it retains 85% its initial value (60 mW cm −2 , RH 25–30%, 25 °C).

Язык: Английский

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Ionized Phenanthroline Derivatives Suppressing Interface Chemical Interactions with Active Layer for High‐efficiency Organic Solar Cells with Exceptional Device Stability

Advanced Materials, Год журнала: 2024, Номер unknown

Опубликована: Окт. 17, 2024

The contact interface between the charge transport interlayer and active layer is crucial for non-fullerene organic solar cells (NF OSCs) to achieve high efficiency long-term stability. In this study, two novel phenanthroline (Phen) derivatives, tbp-Phen tbp-PhenBr, are developed as efficient cathode interfacial materials (CIMs). larger steric hindrance substituents ionization of nitrogen atoms on Phen framework jointly enable tbp-PhenBr CIM with a stable film morphology immensely suppress detrimental chemical interactions NF layer. Consequently, tbp-PhenBr-based OSC achieves higher (PCE = 16.34%) than bathocuproine (BCP)-based control device 13.70%) using PM6:Y6 More importantly, maintains 80% its initial (T

Язык: Английский

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Advances in Organic Photovoltaic Cells: Fine‐Tuning of the Photovoltaic Processes

Solar RRL, Год журнала: 2024, Номер 8(7)

Опубликована: Фев. 24, 2024

This work highlights recent advancements in how the structures and chemical makeups of active layer materials affect photovoltaic processes performance terms power conversion efficiency stability. It further sheds light on optimization organic cell (OPV) relationship between these conditions OPVs performance. The use different substituents same donor or acceptor material has optimal conditions. Furthermore, it is shown that addition third components concentration points. review also suggests a possible way to improve stability OPV through modification layer. To date, some studies showed incorporation component leads over 97% after more than 1000 h.

Язык: Английский

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