Vapor deposition of poly(hexafluorobutyl acrylate) nanocoating for encapsulation of organic solar cells

Yurtdaş, Semih; Tozlu, Cem; Karaman, Mustafa

doi:10.1016/j.porgcoat.2023.107443

Cited by 7 publications

(3 citation statements)

References 25 publications

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“…Moreover, research also found that the polymers with low‐polarity functional groups, like poly(methyl methacrylate) (PMMA), polystyrene (PS), poly(methyl vinyl ether) (PMVE), and poly(vinyl methyl ketone) (PVMK), could avoid p‐type doping to result in better device stability. In recent research, the in situ synthesized poly(hexafluorobutyl acrylate) (PHFBA, Figure 16) nanocoating [ 184 ] is a promising encapsulant to prevent water and oxygen penetration into OSCs, which could be deposited by initiated chemical vapor deposition (i‐CVD).…”

Section: Encapsulationsmentioning

confidence: 99%

Improving the Stability of Organic Solar Cells: From Materials to Devices

Li,

Liu,

Lin

et al. 2023

Solar RRL

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Organic solar cells (OSCs) are a promising emerging photovoltaic technology for solar energy conversion. Recently, the power conversion efficiencies (PCEs) of the OSCs have been improved to get closer to their Schottky–Queisser limit. However, the operational stability of OSCs remains as a major challenge ahead of their deployment for practical applications. The main causes of OSC instability stem from the poor intrinsic stability of materials, meta‐stable morphology of the multi‐component active layer, unstable interfaces, and sensitivity to moisture and oxygen. To address these issues, it is necessary to have a comprehensive and in‐depth understanding of the OSC fundamentals and develop an integrated solution to overcome them. Herein, we summarize the state‐of‐art strategies used to improve the stability of OSCs from the aspects of material design, device processing, and encapsulation techniques, in hope of delivering comprehensive and rational solutions. In the end, the prospects toward the future development of efficient and stable OSCs are provided.This article is protected by copyright. All rights reserved.

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Section: Encapsulationsmentioning

confidence: 99%

Improving the Stability of Organic Solar Cells: From Materials to Devices

Li,

Liu,

Lin

et al. 2023

Solar RRL

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“…The stability of the iCVD fluoropolymer must also be considered. [ 77 ] Recent examples include the encapsulation of organic solar cells with p(PFBA), [ 78 ] the protection of interdigitated electrodes with polytetrafluoroethylene, [ 79 ] the formation of liquid‐repellent surfaces conformally over microstructures with p(PFDA), [ 80 ] and the conformal encapsulation of fibers in military fabrics to repel liquid warfare agents using p(PFOA‐co‐EGDMA). [ 81 ]…”

Section: Device Passivation and Encapsulationmentioning

confidence: 99%

Designing Organic and Hybrid Surfaces and Devices with Initiated Chemical Vapor Deposition (iCVD)

Gleason

2023

Advanced Materials

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The initiated Chemical Vapor Deposition (iCVD) technique is an all‐dry method for designing organic and hybrid polymers. Unlike methods utilizing liquids or line‐of‐sight arrival, iCVD provides conformal surface modification over intricate geometries. Uniform, high‐purity, and pinhole‐free iCVD films can be grown with thicknesses ranging from > 15 μm to < 5 nm. The mild conditions permit damage‐free growth directly on to flexible substrates, 2D materials, and liquids. Novel iCVD polymer morphologies include nanostructured surfaces, nanoporosity, and shaped particles. The well‐established fundamentals of iCVD facilitate the systematic design and optimization of polymers and copolymers. The functional groups provide fine tuning of surface energy, surface charge, and responsive behavior. Further reactions of the functional groups in the polymers can yield either surface modification, compositional gradients through the layer thickness, or complete chemical conversion of the bulk film. The iCVD polymers have been integrated into multilayer device structures as desired for applications in sensing, electronics, optics, electrochemical energy storage, and biotechnology. For these devices, hybrids offer higher values of refractive index and dielectric constant. Multivinyl monomers typically produce ultrasmooth and pinhole‐free and mechanically deformable layers and robust interfaces which are especially promising for electronic skins and wearable optoelectronics.This article is protected by copyright. All rights reserved

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“…iCVD is a solvent-free and low-temperature vapor deposition strategy which is suitable to functionalize fragile surfaces with thin polymeric coatings at high levels of functional group retention. − In iCVD, the chemical activation of the precursor vapors is achieved by using thin heated wires suspended a few centimeters above the substrate surface. The usage of initiator during iCVD provides depositions at low substrate temperatures. − In iCVD, due to the lack of a solvent which would be needed in a classical wet coating strategy, there is no restriction on the compatibility between the surface and the solvent. − Hence, a highly hydrophobic material can be placed on a highly hydrophilic material like GO without any restrictions, which otherwise is impossible to do using wet approaches due to the wetting restrictions. Within the scope of this study, spherical particles were placed on top of the GO surface during the iCVD coating, which allowed patterning the surfaces with hydrophilic domains.…”

Section: Introductionmentioning

confidence: 99%

Environmentally Friendly and All-Dry Hydrophobic Patterning of Graphene Oxide for Fog Harvesting

Yılmaz,

Gürsoy,

Karaman

2024

ACS Omega

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This study examines the fog-harvesting ability of graphene oxide surfaces patterned by hydrophobic domains. The samples were prepared from graphene deposited using low pressure chemical vapor deposition, which was later plasma oxidized to obtain hydrophilic graphene oxide (GO) surfaces. Hydrophobic domains on GO surfaces were formed by initiated CVD (iCVD) of a low-surface-energy poly(perfluorodecyl alkylate) (PPFDA) polymer. Hence, patterned surfaces with hydrophobic/hydrophilic contrast were produced with ease in an all-dry manner. The structures of the as-deposited graphene and PPFDA films were characterized using Raman and Fourier transform infrared spectrophotometer analyses, respectively. The fog harvesting performance of the samples was measured using the fog generated by a nebulizer, in which the average diameter of the fog droplets is comparable to meteorological fog. According to the fog harvesting experiment results, 100 cm 2 of the as-patterned surface can collect fog up to 2.5 L in 10 h in a foggy environment. Hence, hydrophilic/hydrophobic patterned surfaces in this study can be considered as promising fog harvesting materials. Both CVD techniques used in the production of hydrophilic/hydrophobic patterned surfaces can be easily applied to the production of large-scale materials.

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Vapor deposition of poly(hexafluorobutyl acrylate) nanocoating for encapsulation of organic solar cells

Cited by 7 publications

References 25 publications

Improving the Stability of Organic Solar Cells: From Materials to Devices

Improving the Stability of Organic Solar Cells: From Materials to Devices

Designing Organic and Hybrid Surfaces and Devices with Initiated Chemical Vapor Deposition (iCVD)

Environmentally Friendly and All-Dry Hydrophobic Patterning of Graphene Oxide for Fog Harvesting

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