Incorporation of Self‐Assembled Monolayer with Polyaniline Backbone as Hole‐Transporting Layer for Organic Solar Cells

Macromolecular Rapid Communications, Journal Year: 2025, Volume and Issue: unknown

Published: March 3, 2025

Abstract In addition to the heterojunction layer, interfacial layers also determine performance of organic solar cells (OSCs) owing their great role in promoting charge extraction. Herein, study explores use rarely reported polyaniline (PANI)‐derived polymers as self‐assembled hole‐transporting layer (HTL) OSCs. It is observed that tailoring either spacer groups or polymerization sites can greatly affect material aggregation and thus OSC performance. Specifically, polymer with phenyl (36‐Ph‐PANI) largely outperforms alkyl linkers, which ascribed enhanced aspect ratio dipole moment former molecule contributes substrate coverage hole Moreover, linking PANI carbazole at 2,7‐sites much inferior than 3,6‐positions, attributing higher mobility latter induced by formation radical cation. The combined merits 36‐Ph‐PANI, including high transmittance, appropriate doping, efficient extraction, enable a decent efficiency 15.08% This work provides subtle strategy for developing self‐assemble into monolayers, paving way more stable

Language: Английский

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Vacuum Processability of Self-Assembled Monolayers and Their Chemical Interaction with Perovskite Interfaces

Energies, Journal Year: 2025, Volume and Issue: 18(7), P. 1782 - 1782

Published: April 2, 2025

Self-assembled monolayers (SAMs) have gained significant attention as an interfacial engineering strategy for perovskite solar cells (PSCs) due to their efficient charge transport ability and work function tunability. While solution-based methods such dip-coating spin-coating are widely used SAM deposition, challenges non-uniform coverage, solvent contamination, limited control over molecular orientation hinder scalability reproducibility. In contrast, vacuum deposition techniques, including thermal evaporation, overcome these limitations by enabling the formation of highly uniform materials with precise thickness arrangement. Importantly, chemical interactions between layers, coordination bonding Pb2+ ions, play important role in passivating surface defects, modulating energy levels, promoting crystallization. These not only enhance wettability but also improve overall quality stability films. This review highlights advantages vacuum-deposited SAMs, strong layers improving properties critical scalable applications.

Language: Английский

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Optimized Self‐Assembled Monolayer Coverage using Molybdenum Trioxide‐Modified Indium Tin Oxide for High‐Performance Organic Solar Cells

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

Published: April 4, 2025

Abstract Self‐assembled monolayers (SAMs) have recently emerged as promising candidates for interfacial materials in organic photovoltaics (OPVs). However, the quality and integrity of SAM growth are significantly influenced by surface morphology indium tin oxide (ITO) substrates, which can compromise performance reproducibility OPVs. To achieve controlled high‐quality SAMs assembly, this study presents an effective strategy to eliminate sensitivity polycrystalline ITO depositing amorphous molybdenum trioxide (MoO 3 ) thin layer on top. The application MoO homogenize roughness circumvent issues related preferential grain orientation distinct boundaries associated with ITO. This results a more uniform denser coverage compared direct bare Consequently, resulting OPVs based PM6/BTP‐eC9 system exhibit outstanding power conversion efficiency 19.9% (certified at 19.3%), primarily due reduced defects optimized active morphology. More importantly, introduction between enhances long‐term stability devices those solely SAMs. progress highlights importance refining microstructure facilitate favorable formation subsequently construct high‐performance

Language: Английский

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Decoding the Role of Molecular Orientation in Conjugated Self‐Assembled Monolayers for High‐Performance Binary Organic Photovoltaics Approaching 20% Efficiency

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

Published: April 10, 2025

Abstract Molecular orientation stands as the quintessential hallmark of conjugated self‐assembled monolayers (SAMs), which have recently catalyzed noteworthy advancements in organic photovoltaics (OPVs). Nevertheless, an unambiguous understanding these directional arrangements and their impact on optoelectronic properties remains elusive. To address this issue, herein three SAMs with representative orientations, i.e., edge‐on (BCZ‐1), tilt‐on (4PACz) face‐on (BCZ‐2) are meticulously designed. These orientations been rigorously validated by sum frequency generation vibrational spectroscopy first‐principles calculations. Remarkably, unequivocal correlation between molecular device performance is discerned. Particularly, oriented BCZ‐1 exhibits largest dipole moment normal to electrode, accompanied a dense uniform coverage. features collectively contribute its strongest work function increment for ultra‐fast hole extraction minimum interfacial carrier recombination. As result, champion power conversion efficiency 19.93% achieved devices based D18:L8‐BO active layer, representing one highest values reported binary bulk heterojunction OPVs. Besides, shows great potential practical applications due superior up‐scalability enhanced shelf‐stability. Overall, offers in‐depth insights into behaviors SAMs, opening new avenues unlock

Language: Английский

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