Transparency and electrical properties of meshed metal films

Hautcoeur, Julien; Castel, Xavier; Colombel, Franck; Benzerga, Ratiba; Himdi, Mohamed; Legeay, G.; Motta-Cruz, Eduardo

doi:10.1016/j.tsf.2011.01.262

Cited by 74 publications

(56 citation statements)

References 14 publications

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“…The antenna layout dimensions are also indicated in Figure 1. The transparent antennas, namely UWB-1, UWB-2 and UWB-3, are fabricated from the AgGL material: a meshed metal bilayer [8]. This transparent and conductive coating is elaborated from a 6 µm-thick silver (Ag) film grown by RF sputtering on a 5 nm ultrathin adhesion titanium (Ti) underlayer.…”

Section: Ultra-wideband Antenna Designmentioning

confidence: 99%

“…A periodic array of square apertures is achieved in the metal bilayer by standard photolithographic wet etching process. More details are reported in [8].…”

Section: Ultra-wideband Antenna Designmentioning

confidence: 99%

“…This is due to a technological restriction of the AgGL coating during the elaboration step. Indeed the edges of the meshed patterns are not perfectly defined on the photomask used in photolithographic process [8]. As a result, the radioelectrical size of the antenna is altered of one pitch on each inner and outer side, as described in Figure 11.…”

Section: Optimization Of the Transparencymentioning

confidence: 99%

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Radiofrequency Performances of Transparent Ultra-Wideband Antennas

Hautcoeur¹,

Colombel²,

Castel³

et al. 2011

PIER C

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Abstract-In this paper, optically transparent ultra-wideband (UWB) monopole antennas in S-band and Cband are presented, compared and discussed. Three transparent UWB antennas elaborated from the AgGL (Silver Grid Layer) material with various levels of transparency (54.5%, 73.4% and 80.3%) and of sheet resistances 0.018 Ω/sq, 0.022 Ω/sq and 0.052 Ω/sq, respectively are tested. The radiofrequency measurements show performances very close to those of a light reflecting reference antenna made of a continuous silver/titanium bilayer (0.0026 Ω/sq sheet resistance). Conversely, the fourth transparent antenna, made of usual transparent conducting oxide/metal multilayer presents significant ohmic losses and weak radiofrequency performances. The gains of the UWB AgGL antennas are similar to that of the reference antenna (∼ 6 dBi max.). Whereas the gain of the transparent multilayer antenna always stays ∼ 2 dB lower than that of the reference. This work demonstrates the relevance of AgGL coating in the fabrication of transparent UWB antennas with high radiation efficiency.

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Section: Ultra-wideband Antenna Designmentioning

confidence: 99%

“…A periodic array of square apertures is achieved in the metal bilayer by standard photolithographic wet etching process. More details are reported in [8].…”

Section: Ultra-wideband Antenna Designmentioning

confidence: 99%

Section: Optimization Of the Transparencymentioning

confidence: 99%

See 1 more Smart Citation

Radiofrequency Performances of Transparent Ultra-Wideband Antennas

Hautcoeur¹,

Colombel²,

Castel³

et al. 2011

PIER C

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“…It is based on micrometric mesh metal films printed on glass substrates. 14 Metal layers exhibit low sheet resistance (and low ohmic loss as a result) and apertures inside the metal layers give the needed and constant optical transparency in the visible light spectrum (no interference fringes). Metal thickness adjustment prevents any skin depth effect at the operating frequency without affecting the optical transparency level.…”

mentioning

confidence: 99%

“…Metal thickness adjustment prevents any skin depth effect at the operating frequency without affecting the optical transparency level. 14 Optically transparent passive antennas have already been developed from such a material at various frequencies, [15][16][17][18] thereby demonstrating the full relevance of this new technology. Now the main challenge consists in making such transparent antennas active, i.e.…”

mentioning

confidence: 99%

Mesh parameters influence on transparent and active antennas performance at microwaves

et al. 2017

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Highly Conductive and Transparent PEDOT:PSS Films with a Fluorosurfactant for Stretchable and Flexible Transparent Electrodes

Vosgueritchian

Lipomi

Bao

2011

Adv Funct Materials

1,081

946

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Highly conductive and transparent poly-(3,4-ethylenedioxythiophene):poly(styrenesulfonic acid) (PEDOT:PSS) films, incorporating a fluorosurfactant as an additive, have been prepared for stretchable and transparent electrodes. The fluorosurfactant-treated PEDOT:PSS films show a 35% improvement in sheet resistance (R s ) compared to untreated films. In addition, the fluorosurfactant renders PEDOT:PSS solutions amenable for deposition on hydrophobic surfaces, including pre-deposited, annealed films of PEDOT:PSS (enabling the deposition of thick, highly conductive, multilayer films) and stretchable poly(dimethylsiloxane) (PDMS) substrates (enabling stretchable electronics). Four-layer PEDOT:PSS films have an R s of 46 Ω per square with 82% transmittance (at 550 nm). These films, deposited on a pre-strained PDMS substrate and buckled, are shown to be reversibly stretchable, with no change to R s , during the course of over 5000 cycles of 0 to 10% strain. Using the multilayer PEDOT:PSS films as anodes, indium tin oxide (ITO)-free organic photovoltaics are prepared and shown to have power conversion efficiencies comparable to that of devices with ITO as the anode. These results show that these highly conductive PEDOT:PSS films can not only be used as transparent electrodes in

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Transparency and electrical properties of meshed metal films

Cited by 74 publications

References 14 publications

Radiofrequency Performances of Transparent Ultra-Wideband Antennas

Radiofrequency Performances of Transparent Ultra-Wideband Antennas

Mesh parameters influence on transparent and active antennas performance at microwaves

Highly Conductive and Transparent PEDOT:PSS Films with a Fluorosurfactant for Stretchable and Flexible Transparent Electrodes

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