Natural Dextran as an Efficient Interfacial Passivator for ZnO‐Based Electron‐Transport Layers in Inverted Organic Solar Cells

Advanced Energy Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 12, 2025

Abstract Compared to conventional organic solar cells (OSCs) with acidic PEDOT:PSS as the hole transport layer (HTL), inverted OSCs (i‐OSCs) zinc oxide (ZnO) electron (ETL) display significant advantages in terms of high stability. However, an obvious limitation i‐OSCs is that sol‐gel processed ZnO layers possess detrimental defects at interface, which hinders improvement its photovoltaic performance. To address this problem, a natural, and green dextran (Dex) used efficient interfacial passivator modify layer, thereby achieving enhanced device performance i‐OSCs. The introduction Dex efficiently suppresses recombination loss, resulting higher power conversion efficiencies (PCEs). Interestingly, Dex‐passivated exhibits broad applications ETL for different types i‐OSCs, including fullerene, non‐fullerene, all‐polymer OSCs, D18:Y6 system gives highest PCE 18.32%. This one values reported binary Moreover, application significantly improves stability, T 80 lifetimes based on PM6:Y6, D18:Y6, PM6:PY‐IT exceed 1500 h. These results imply excellent ZnO‐based high‐efficiency stable

Language: Английский

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Suppressed Degradation Process of Green‐Solvent Based Organic Solar Cells Through ZnO Modification With Sulfhydryl Derivatives

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 29, 2024

Abstract The interface of organic solar cells plays a crucial role in device performance and stability. Several investigations demonstrated that the will affect morphology microstructure active layer, which is important for performance. Here, several mercaptan derivatives are explored green‐solvent based (PBDB‐TF‐T1: BTP‐4F‐12) as effective stabilization modifiers on ZnO. Operando grazing‐incidence wide/small‐angle X‐ray scattering (GIWAXS/GISAXS) provides deep understanding degradation process during operation. driven by compression molecule stacking well decrease donor crystallinity, besides known decomposition acceptor at interface. Solar cell comprises three stages, where an unexpected component from appears second stage, simultaneously with shapely shrinking micro‐structure. Furthermore, modifier pentaerythritol tetrakis(3‐mercapto‐propionate) (PETMP) stabilizes crystallinity suppresses acceptor, thus improving modification effect caused interaction between Zn S sulfhydryl groups derivatives. Thus, studies changes layer extend knowledge ex situ characterizations, broadening mechanisms.

Language: Английский

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Decreased Hysteresis Benefited from Enhanced Lattice Oxygen and Promoted Band Alignment with Electron Transport Layer Modification in Perovskite Solar Cells

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 8, 2025

SnO2 electron transport layer (ETL) morphology plays a vital role in carrier transportation and the properties of perovskite solar cells (PSCs). However, uneven pore surface would inevitably lead to high interface defects, hysteresis, poor performance. In this work, we use molecular modifier 4-guanidinobenzoic acid methanesulfonate (GAMSA) build bridge on buried SnO2/perovskite. XPS results demonstrate that ratio lattice oxygen (OL)/adsorbed (OV) increased from 1.35 2.34 after GAMSA modification, thus, Sn4+ O vacancy defects were effectively reduced. Meanwhile, conduction band minimum ETL enhanced −4.33 eV −4.07 eV, which obviously facilitated transport. As result, optimal device exhibits an efficiency 22.42%, is much higher than control one 20.13%, with greatly decreased hysteresis index 14.35% 3.27%. Notably, optimized target demonstrated excellent long-term stability, maintaining initial 87% 2000 h storage N2 atmosphere dark at room temperature. This work paves new method modification improve restrain for performance PSCs.

Language: Английский

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Interface Engineering with BPhen:Cs₂CO₃ for High‐Performance and Stable Inverted Nonfullerene Organic Solar Cells

Solar RRL, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 19, 2025

The widely used ZnO electron transport layer in inverted nonfullerene organic solar cells (nf‐OSCs) offers advantages such as excellent mobility and optical transparency. However, challenges arise from surface defects solution‐processed ZnO, where oxygen‐containing can penetrate the photoactive layer, leading to photocatalytic reactions with acceptors under UV light, thereby compromising device stability. Another challenge is that most recent high‐efficiency nf‐OSCs employ conventional structures, while structures exhibit comparatively lower performance. To develop stable high‐performance nf‐OSCs, interface modification essential mitigate issues enhance relatively power conversion efficiency (PCE). overcome these limitations, we introduce bathophenanthroline (BPhen) doped Cs 2 CO 3 . BPhen:Cs creates suitable energy levels, enhancing reducing charge recombination. This approach significantly improves current density fill factor, resulting a notable enhancement PCE of pristine devices 15.54% 17.09% PM6:Y6 nf‐OSCs. Furthermore, ZnO/BPhen:Cs stability, retaining ~83% their initial even after 1000 h without encapsulation, showcasing superior stability compared ZnO‐based devices.

Language: Английский

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Hybrid SnO2/g-C3N4 Layers with Plasma-Induced Modifications for Enhanced Charge Transport in Perovskite Solar Cells

Journal of Materials Chemistry A, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Plasma was used to transform the randomly sized & oriented graphitic carbon nitride (GCN) nanosheet into size uniform, functionalized GCN nanoparticles which as an effective defect passivating agent for ETL in perovskite solar cells.

Language: Английский

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Optimization and Enhancement Optoelectronic Performances of NiO and CuO Nanoparticles Incorporated Organic Photovoltaic Devices

Journal of Inorganic and Organometallic Polymers and Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 27, 2025

Language: Английский

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MAS NMR Studies on the Formation and Catalytic Activity of Oxygen Vacancy on the ZnO {100} Surface

The Journal of Physical Chemistry C, Journal Year: 2025, Volume and Issue: unknown

Published: April 22, 2025

Language: Английский

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High-Performance Polymer Solar Cells Based on Blue-Light-Emitting Polyfluorene Derivative-Doped Systems

Energy & Fuels, Journal Year: 2025, Volume and Issue: unknown

Published: March 17, 2025

Language: Английский

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Borax-Assisted Ball Milling Produces High-Yield Tin Selenide Quantum Dots for Efficient Perovskite Solar Cell Applications

ACS Sustainable Chemistry & Engineering, Journal Year: 2025, Volume and Issue: unknown

Published: March 20, 2025

Language: Английский

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Porphyrin‐Modified SnO₂ Electron Transport Layer for Efficient and Stable Inverted Organic Solar Cells

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 4, 2025

Abstract Compared with conventional devices, inverted organic solar cells (OSCs) generally exhibit superior stability, the electron transport layer (ETL) and interface engineering playing key roles in enhancing both efficiency stability. In this study, tetra‐phenyl porphyrin (TPP), a free base porphyrin, is utilized to modify commercially available tin oxide (SnO₂) nanoparticles, thus creating high‐performance ETL for OSCs. First‐principles calculations characterizations reveal that TPP interacts effectively SnO₂ surface, reduces work function, passivates surface defects, improves conductivity of SnO₂. power conversion (PCE, 15.37%) control PM6:Y6‐based hybrid enables an improved PCE 17.72%. Furthermore, ternary device PM6:L8‐BO:BTP‐eC9 achieves 19.51% (Certificated efficiency: 19.13%, record OSCs). This study presents promising strategy developing highly efficient stable cells.

Language: Английский

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