Durability study of transparent and flexible nanolayer barrier for photovoltaic devices

Rossi, Gabriella; Altavilla, Claudia; Scarfato, Paola; Ciambelli, Paolo; Incarnato, Loredana

doi:10.1016/j.polymdegradstab.2014.12.022

Cited by 10 publications

(4 citation statements)

References 26 publications

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“…In particular, it was designed to obtain a good graphene transfer without altering the PET film (short transfer time, etchant concentration, etc.). PET was chosen as a flexible substrate for its many advantages: − it is one of the most largely used polymers at an industrial scale, it has excellent optical and mechanical properties, it is lightweight, and it has a reasonable cost. The graphene film, synthesized by cold wall CVD, thanks to good continuity and quality works as a transparent barrier on a PET film to be applied with a double function: window electrode and a barrier even for flexible solar cells.…”

Section: Introductionmentioning

confidence: 99%

Cold Wall Chemical Vapor Deposition Graphene-Based Conductive Tunable Film Barrier

Sarno

Rossi

Cirillo

et al. 2018

Ind. Eng. Chem. Res.

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In this paper, we report on a continuous, flexible, and transparent graphene film obtained by cold wall chemical vapor deposition (CVD) on Cu foil. The good continuity of the graphene film, obtained in optimized conditions (e.g., pretreatment to increase copper grain size, Ar flow during synthesis to control Cu sublimation) was successfully transferred on a PET substrate to be applied with a double function of window electrode and barrier film. PET film after a single layer graphene deposition showed good performance: a sheet resistance of 0.6 kΩ/sq, a low reduction of transmittance in comparison with the bare polymer (only ∼3% in a large range), an increment of 95% for the oxygen barrier properties, and a very low water vapor transmission rate (WVTR) (∼96% reduction respect to PET substrate). This shows that graphene film may be an important alternative to conventional transparent electrode materials. We also speculate on the possibility to modulate polymer permeability at the nanoscale just applying a controlled-nanoporosity graphene layer.

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Section: Introductionmentioning

confidence: 99%

Cold Wall Chemical Vapor Deposition Graphene-Based Conductive Tunable Film Barrier

Sarno

Rossi

Cirillo

et al. 2018

Ind. Eng. Chem. Res.

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“…Rossi et al . described the chemisorption of self‐assembled monolayers of perfluoroalkylsilanes on commercial barrier foils consisting of PET‐SiOx (12 µm) and ETFE‐SiOx (100 µm) . Different types of environmental degradation factors were simulated, including acid rains and damp heat.…”

Section: Durability Of Pv Systems and The Role Of Polymersmentioning

confidence: 99%

Polymeric materials for long‐term durability of photovoltaic systems

Griffini

Turri

2015

J of Applied Polymer Sci

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Photovoltaic (PV) technology has evolved rapidly in the past few decades and now encompasses a large variety of materials and device structures. A key aspect to be taken into account in any PV technology is the operational durability of the systems in outdoor conditions. Clearly, loss of performance during operation represents a significant drawback and limitation in the commercialization of this technology. In this context, the large compositional flexibility of polymeric materials as well as their proven easy processability may be of great help in imparting improved durability to PV systems. In this review, a summary on the state of the art and most recent developments in the field of polymeric materials for improved long-term durability of PV devices is presented, with particular emphasis on the use of polymers as encapsulation materials and protective coatings in the field of both PV and lightconcentration systems.

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“…The hydrophobic nanocoating, which significantly improved the barrier properties of the substrate towards both liquid and gas atmospheric agents (oxygen), also showed a good stability and chemical resistance when applied on both PETSiOx and ETFESiOx substrates (Rossi et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Effect of time and of precursor molecule on the deposition of hydrophobic nanolayers on ethyelene tetrafluoroethylene–silicon oxide substrates

2016

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A method was developed for generating transparent and hydrophobic nanolayers chemisorbed onto flexible substrates of ethylene tetrafluoroethylene-silicon oxide (ETFE-SiOx). In particular, the effect of the deposition time and of the precursor molecule on the nanocoating process was analyzed with the aim of pursuing an optimization of the above method in an industrial application perspective. It was found that precursor molecule of triethoxysilane allowed to obtain better hydrophobic properties on the SiOx surface in shorter times compared to trichlorosilane, reaching the 92 % of final contact angle (CA) value of 106°after only 1 h of deposition. The optical properties and surface morphology were also assessed in function of time, revealing that an initial transparency reduction is followed by a subsequent transmittance increase during the self assembly of fluoroalkylsilanes on the SiOx surface, coherently with the surface roughness analysis data. Encouraging results were also obtained in terms of oleophobic properties improvement of the nanocoated surfaces.

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Durability study of transparent and flexible nanolayer barrier for photovoltaic devices

Cited by 10 publications

References 26 publications

Cold Wall Chemical Vapor Deposition Graphene-Based Conductive Tunable Film Barrier

Cold Wall Chemical Vapor Deposition Graphene-Based Conductive Tunable Film Barrier

Polymeric materials for long‐term durability of photovoltaic systems

Effect of time and of precursor molecule on the deposition of hydrophobic nanolayers on ethyelene tetrafluoroethylene–silicon oxide substrates

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